From 43d44975b1f49df640916cca5f6a0b138696da3c Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Wed, 13 Feb 2019 19:11:37 +0100
Subject: Remove WebExtension support from the platform.

- Conditional code
- WE APIs
- WE toolkit theming
---
 .../webextensions/test/mochitest/.eslintrc.js      |   35 -
 .../webextensions/test/mochitest/chrome.ini        |   35 -
 .../webextensions/test/mochitest/chrome_head.js    |   12 -
 .../test/mochitest/file_WebNavigation_page1.html   |   12 -
 .../test/mochitest/file_WebNavigation_page2.html   |    7 -
 .../test/mochitest/file_WebNavigation_page3.html   |    9 -
 .../test/mochitest/file_WebRequest_page3.html      |   11 -
 .../webextensions/test/mochitest/file_csp.html     |   14 -
 .../test/mochitest/file_csp.html^headers^          |    1 -
 .../test/mochitest/file_ext_test_api_injection.js  |   12 -
 .../test/mochitest/file_image_bad.png              |  Bin 5401 -> 0 bytes
 .../test/mochitest/file_image_good.png             |  Bin 580 -> 0 bytes
 .../test/mochitest/file_image_redirect.png         |  Bin 5401 -> 0 bytes
 .../webextensions/test/mochitest/file_mixed.html   |   13 -
 .../test/mochitest/file_permission_xhr.html        |   55 -
 .../test/mochitest/file_privilege_escalation.html  |   13 -
 .../webextensions/test/mochitest/file_sample.html  |   12 -
 .../test/mochitest/file_script_bad.js              |    3 -
 .../test/mochitest/file_script_good.js             |    3 -
 .../test/mochitest/file_script_redirect.js         |    4 -
 .../test/mochitest/file_script_xhr.js              |    5 -
 .../test/mochitest/file_style_bad.css              |    3 -
 .../test/mochitest/file_style_good.css             |    3 -
 .../test/mochitest/file_style_redirect.css         |    3 -
 .../test/mochitest/file_teardown_test.js           |   24 -
 .../file_webNavigation_clientRedirect.html         |    9 -
 ...e_webNavigation_clientRedirect_httpHeaders.html |    8 -
 ...gation_clientRedirect_httpHeaders.html^headers^ |    1 -
 .../file_webNavigation_frameClientRedirect.html    |   12 -
 .../file_webNavigation_frameRedirect.html          |   12 -
 .../file_webNavigation_manualSubframe.html         |   12 -
 .../file_webNavigation_manualSubframe_page1.html   |    8 -
 .../file_webNavigation_manualSubframe_page2.html   |    7 -
 .../test/mochitest/file_with_about_blank.html      |   10 -
 .../webextensions/test/mochitest/head.js           |   13 -
 .../webextensions/test/mochitest/head_cookies.js   |  167 ---
 .../test/mochitest/head_webrequest.js              |  331 -----
 .../webextensions/test/mochitest/mochitest.ini     |  115 --
 .../webextensions/test/mochitest/redirection.sjs   |    4 -
 .../test/mochitest/return_headers.sjs              |   20 -
 .../test_chrome_ext_background_debug_global.html   |  166 ---
 .../mochitest/test_chrome_ext_background_page.html |   84 --
 ...ext_contentscript_unrecognizedprop_warning.html |   80 --
 .../test_chrome_ext_downloads_saveAs.html          |   68 -
 .../test_chrome_ext_eventpage_warning.html         |  106 --
 .../mochitest/test_chrome_ext_hybrid_addons.html   |  141 --
 .../test/mochitest/test_chrome_ext_idle.html       |   64 -
 .../test_chrome_ext_shutdown_cleanup.html          |   50 -
 .../mochitest/test_chrome_ext_storage_cleanup.html |  164 ---
 .../test_chrome_ext_trustworthy_origin.html        |   53 -
 ...est_chrome_ext_webnavigation_resolved_urls.html |   83 --
 ...st_chrome_ext_webrequest_background_events.html |   96 --
 .../test_chrome_native_messaging_paths.html        |   61 -
 .../test/mochitest/test_clipboard.html             |  140 --
 .../test/mochitest/test_ext_all_apis.js            |  160 ---
 .../test_ext_background_api_injection.html         |   46 -
 .../test/mochitest/test_ext_background_canvas.html |   47 -
 .../test_ext_background_generated_url.html         |   47 -
 .../mochitest/test_ext_background_teardown.html    |   76 --
 .../test_ext_content_security_policy.html          |  162 ---
 .../test/mochitest/test_ext_contentscript.html     |  116 --
 .../test_ext_contentscript_about_blank.html        |  117 --
 .../test_ext_contentscript_api_injection.html      |   88 --
 .../test_ext_contentscript_async_loading.html      |   54 -
 .../mochitest/test_ext_contentscript_context.html  |   81 --
 .../test_ext_contentscript_create_iframe.html      |  165 ---
 .../test/mochitest/test_ext_contentscript_css.html |   48 -
 .../test_ext_contentscript_devtools_metadata.html  |   81 --
 .../test_ext_contentscript_exporthelpers.html      |   95 --
 .../test_ext_contentscript_incognito.html          |   89 --
 .../test_ext_contentscript_permission.html         |   59 -
 .../mochitest/test_ext_contentscript_teardown.html |   96 --
 .../test/mochitest/test_ext_cookies.html           |  234 ----
 .../mochitest/test_ext_cookies_containers.html     |   93 --
 .../test/mochitest/test_ext_cookies_expiry.html    |   72 -
 .../test_ext_cookies_permissions_bad.html          |  112 --
 .../test_ext_cookies_permissions_good.html         |   86 --
 .../mochitest/test_ext_exclude_include_globs.html  |   92 --
 .../mochitest/test_ext_external_messaging.html     |  111 --
 .../test/mochitest/test_ext_generate.html          |   49 -
 .../test/mochitest/test_ext_geturl.html            |   72 -
 .../test/mochitest/test_ext_i18n.html              |  432 ------
 .../test/mochitest/test_ext_i18n_css.html          |  116 --
 .../test_ext_inIncognitoContext_window.html        |   49 -
 .../test/mochitest/test_ext_jsversion.html         |   86 --
 .../test/mochitest/test_ext_listener_proxies.html  |   63 -
 .../test/mochitest/test_ext_notifications.html     |  224 ---
 .../test/mochitest/test_ext_permission_xhr.html    |  119 --
 .../test/mochitest/test_ext_runtime_connect.html   |   83 --
 .../test/mochitest/test_ext_runtime_connect2.html  |  103 --
 .../mochitest/test_ext_runtime_connect_twoway.html |  127 --
 .../mochitest/test_ext_runtime_disconnect.html     |   78 --
 .../test/mochitest/test_ext_runtime_id.html        |   61 -
 .../test/mochitest/test_ext_sandbox_var.html       |   60 -
 .../test/mochitest/test_ext_schema.html            |   73 -
 .../test_ext_sendmessage_doublereply.html          |  101 --
 .../test_ext_sendmessage_no_receiver.html          |   83 --
 .../test/mochitest/test_ext_sendmessage_reply.html |   79 --
 .../mochitest/test_ext_sendmessage_reply2.html     |  181 ---
 .../test/mochitest/test_ext_storage_content.html   |  330 -----
 .../test/mochitest/test_ext_storage_tab.html       |  118 --
 .../mochitest/test_ext_subframes_privileges.html   |  202 ---
 .../test/mochitest/test_ext_tab_teardown.html      |  150 --
 .../test/mochitest/test_ext_test.html              |  191 ---
 .../test/mochitest/test_ext_unload_frame.html      |  170 ---
 .../test_ext_web_accessible_resources.html         |  353 -----
 .../test/mochitest/test_ext_webnavigation.html     |  559 --------
 .../mochitest/test_ext_webnavigation_filters.html  |  308 -----
 .../test_ext_webrequest_background_events.html     |  116 --
 .../test/mochitest/test_ext_webrequest_basic.html  |  327 -----
 .../mochitest/test_ext_webrequest_suspend.html     |  216 ---
 .../test/mochitest/test_ext_webrequest_upload.html |  199 ---
 .../mochitest/test_ext_window_postMessage.html     |  105 --
 .../test/mochitest/test_ext_xhr_capabilities.html  |   86 --
 .../test/mochitest/webrequest_chromeworker.js      |    8 -
 .../test/mochitest/webrequest_test.jsm             |   22 -
 .../test/mochitest/webrequest_worker.js            |    3 -
 .../webextensions/test/xpcshell/.eslintrc.js       |    9 -
 .../test/xpcshell/data/file_download.html          |   12 -
 .../test/xpcshell/data/file_download.txt           |    1 -
 .../components/webextensions/test/xpcshell/head.js |  111 --
 .../test/xpcshell/head_native_messaging.js         |  131 --
 .../webextensions/test/xpcshell/head_sync.js       |   67 -
 .../test/xpcshell/native_messaging.ini             |   13 -
 .../test/xpcshell/test_csp_custom_policies.js      |   38 -
 .../test/xpcshell/test_csp_validator.js            |   85 --
 .../webextensions/test/xpcshell/test_ext_alarms.js |  210 ---
 .../test/xpcshell/test_ext_alarms_does_not_fire.js |   33 -
 .../test/xpcshell/test_ext_alarms_periodic.js      |   44 -
 .../test/xpcshell/test_ext_alarms_replaces.js      |   44 -
 .../test/xpcshell/test_ext_api_permissions.js      |   64 -
 .../test/xpcshell/test_ext_apimanager.js           |   91 --
 .../test_ext_background_generated_load_events.js   |   23 -
 .../test_ext_background_generated_reload.js        |   24 -
 .../xpcshell/test_ext_background_global_history.js |   22 -
 .../test_ext_background_private_browsing.js        |   40 -
 .../test_ext_background_runtime_connect_params.js  |   72 -
 .../xpcshell/test_ext_background_sub_windows.js    |   45 -
 .../test_ext_background_window_properties.js       |   34 -
 .../test/xpcshell/test_ext_contexts.js             |  190 ---
 .../test/xpcshell/test_ext_downloads.js            |   76 --
 .../test/xpcshell/test_ext_downloads_download.js   |  354 -----
 .../test/xpcshell/test_ext_downloads_misc.js       |  862 ------------
 .../test/xpcshell/test_ext_downloads_search.js     |  402 ------
 .../test/xpcshell/test_ext_experiments.js          |  175 ---
 .../test/xpcshell/test_ext_extension.js            |   55 -
 .../webextensions/test/xpcshell/test_ext_idle.js   |  202 ---
 .../test/xpcshell/test_ext_json_parser.js          |   37 -
 .../xpcshell/test_ext_legacy_extension_context.js  |  168 ---
 .../test_ext_legacy_extension_embedding.js         |  188 ---
 .../test/xpcshell/test_ext_localStorage.js         |   50 -
 .../test/xpcshell/test_ext_management.js           |   20 -
 .../xpcshell/test_ext_management_uninstall_self.js |  135 --
 .../test_ext_manifest_content_security_policy.js   |   30 -
 .../test/xpcshell/test_ext_manifest_incognito.js   |   27 -
 .../test_ext_manifest_minimum_chrome_version.js    |   13 -
 .../test/xpcshell/test_ext_native_messaging.js     |  514 -------
 .../xpcshell/test_ext_native_messaging_perf.js     |  128 --
 .../test_ext_native_messaging_unresponsive.js      |   82 --
 .../xpcshell/test_ext_onmessage_removelistener.js  |   30 -
 .../test_ext_runtime_connect_no_receiver.js        |   23 -
 .../xpcshell/test_ext_runtime_getBrowserInfo.js    |   26 -
 .../xpcshell/test_ext_runtime_getPlatformInfo.js   |   25 -
 .../test_ext_runtime_onInstalled_and_onStartup.js  |  337 -----
 .../test/xpcshell/test_ext_runtime_sendMessage.js  |   79 --
 .../test_ext_runtime_sendMessage_errors.js         |   59 -
 .../test_ext_runtime_sendMessage_no_receiver.js    |   54 -
 .../xpcshell/test_ext_runtime_sendMessage_self.js  |   51 -
 .../test/xpcshell/test_ext_schemas.js              | 1427 --------------------
 .../xpcshell/test_ext_schemas_allowed_contexts.js  |  147 --
 .../xpcshell/test_ext_schemas_api_injection.js     |  102 --
 .../test/xpcshell/test_ext_schemas_async.js        |  232 ----
 .../webextensions/test/xpcshell/test_ext_simple.js |   69 -
 .../test/xpcshell/test_ext_storage.js              |  334 -----
 .../test/xpcshell/test_ext_topSites.js             |   85 --
 .../test/xpcshell/test_getAPILevelForWindow.js     |   55 -
 .../test/xpcshell/test_locale_converter.js         |  133 --
 .../test/xpcshell/test_locale_data.js              |  130 --
 .../test/xpcshell/test_native_messaging.js         |  302 -----
 .../webextensions/test/xpcshell/xpcshell.ini       |   69 -
 180 files changed, 19193 deletions(-)
 delete mode 100644 toolkit/components/webextensions/test/mochitest/.eslintrc.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/chrome.ini
 delete mode 100644 toolkit/components/webextensions/test/mochitest/chrome_head.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_WebNavigation_page1.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_WebNavigation_page2.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_WebNavigation_page3.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_WebRequest_page3.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_csp.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_csp.html^headers^
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_ext_test_api_injection.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_image_bad.png
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_image_good.png
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_image_redirect.png
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_mixed.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_permission_xhr.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_privilege_escalation.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_sample.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_script_bad.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_script_good.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_script_redirect.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_script_xhr.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_style_bad.css
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_style_good.css
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_style_redirect.css
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_teardown_test.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html^headers^
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_frameClientRedirect.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_frameRedirect.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page1.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page2.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/file_with_about_blank.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/head.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/head_cookies.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/head_webrequest.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/mochitest.ini
 delete mode 100644 toolkit/components/webextensions/test/mochitest/redirection.sjs
 delete mode 100644 toolkit/components/webextensions/test/mochitest/return_headers.sjs
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_debug_global.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_page.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_contentscript_unrecognizedprop_warning.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_downloads_saveAs.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_eventpage_warning.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_hybrid_addons.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_idle.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_shutdown_cleanup.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_storage_cleanup.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_trustworthy_origin.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_webnavigation_resolved_urls.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_ext_webrequest_background_events.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_chrome_native_messaging_paths.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_clipboard.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_background_api_injection.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_background_canvas.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_background_generated_url.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_background_teardown.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_content_security_policy.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_about_blank.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_api_injection.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_async_loading.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_context.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_create_iframe.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_css.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_devtools_metadata.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_exporthelpers.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_incognito.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_permission.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_contentscript_teardown.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_cookies.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_cookies_containers.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_cookies_expiry.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_bad.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_good.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_exclude_include_globs.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_generate.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_geturl.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_i18n.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_i18n_css.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_inIncognitoContext_window.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_jsversion.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_listener_proxies.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_notifications.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_permission_xhr.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect2.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect_twoway.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_runtime_disconnect.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_runtime_id.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_sandbox_var.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_schema.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_doublereply.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_no_receiver.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_storage_content.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_storage_tab.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_subframes_privileges.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_tab_teardown.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_test.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_unload_frame.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_web_accessible_resources.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_webnavigation.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_webnavigation_filters.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_webrequest_background_events.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_webrequest_basic.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_webrequest_suspend.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_webrequest_upload.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_window_postMessage.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/test_ext_xhr_capabilities.html
 delete mode 100644 toolkit/components/webextensions/test/mochitest/webrequest_chromeworker.js
 delete mode 100644 toolkit/components/webextensions/test/mochitest/webrequest_test.jsm
 delete mode 100644 toolkit/components/webextensions/test/mochitest/webrequest_worker.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/.eslintrc.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/data/file_download.html
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/data/file_download.txt
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/head.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/head_native_messaging.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/head_sync.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/native_messaging.ini
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_csp_custom_policies.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_csp_validator.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_alarms.js
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 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_alarms_periodic.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_alarms_replaces.js
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 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_reload.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_background_global_history.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_background_runtime_connect_params.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_background_sub_windows.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_background_window_properties.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_contexts.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_downloads.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_downloads_download.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_downloads_misc.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_downloads_search.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_experiments.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_extension.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_idle.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_json_parser.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_context.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_embedding.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_localStorage.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_management.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_management_uninstall_self.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_manifest_content_security_policy.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_manifest_incognito.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_manifest_minimum_chrome_version.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_perf.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_unresponsive.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_onmessage_removelistener.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_runtime_connect_no_receiver.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getBrowserInfo.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getPlatformInfo.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_runtime_onInstalled_and_onStartup.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage.js
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 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_ext_topSites.js
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 delete mode 100644 toolkit/components/webextensions/test/xpcshell/test_native_messaging.js
 delete mode 100644 toolkit/components/webextensions/test/xpcshell/xpcshell.ini

(limited to 'toolkit/components/webextensions/test')

diff --git a/toolkit/components/webextensions/test/mochitest/.eslintrc.js b/toolkit/components/webextensions/test/mochitest/.eslintrc.js
deleted file mode 100644
index 53938410b..000000000
--- a/toolkit/components/webextensions/test/mochitest/.eslintrc.js
+++ /dev/null
@@ -1,35 +0,0 @@
-"use strict";
-
-module.exports = { // eslint-disable-line no-undef
-  "extends": "../../../../../testing/mochitest/mochitest.eslintrc.js",
-
-  "env": {
-    "webextensions": true,
-  },
-
-  "globals": {
-    "ChromeWorker": false,
-    "onmessage": true,
-    "sendAsyncMessage": false,
-
-    "waitForLoad": true,
-    "promiseConsoleOutput": true,
-
-    "ExtensionTestUtils": false,
-    "NetUtil": true,
-    "webrequest_test": false,
-    "XPCOMUtils": true,
-
-    // head_webrequest.js symbols
-    "addStylesheet": true,
-    "addLink": true,
-    "addImage": true,
-    "addScript": true,
-    "addFrame": true,
-    "makeExtension": false,
-  },
-
-  "rules": {
-    "no-shadow": 0,
-  },
-};
diff --git a/toolkit/components/webextensions/test/mochitest/chrome.ini b/toolkit/components/webextensions/test/mochitest/chrome.ini
deleted file mode 100644
index 26585cad7..000000000
--- a/toolkit/components/webextensions/test/mochitest/chrome.ini
+++ /dev/null
@@ -1,35 +0,0 @@
-[DEFAULT]
-support-files =
-  chrome_head.js
-  head.js
-  head_cookies.js
-  file_sample.html
-  webrequest_chromeworker.js
-  webrequest_test.jsm
-tags = webextensions
-
-[test_chrome_ext_background_debug_global.html]
-skip-if = (os == 'android') # android doesn't have devtools
-[test_chrome_ext_background_page.html]
-skip-if = (toolkit == 'android') # android doesn't have devtools
-[test_chrome_ext_eventpage_warning.html]
-[test_chrome_ext_contentscript_unrecognizedprop_warning.html]
-skip-if = (os == 'android') # browser.tabs is undefined. Bug 1258975 on android.
-[test_chrome_ext_hybrid_addons.html]
-[test_chrome_ext_trustworthy_origin.html]
-[test_chrome_ext_webnavigation_resolved_urls.html]
-skip-if = (os == 'android') # browser.tabs is undefined. Bug 1258975 on android.
-[test_chrome_ext_shutdown_cleanup.html]
-[test_chrome_native_messaging_paths.html]
-skip-if = os != "mac" && os != "linux"
-[test_ext_cookies_expiry.html]
-[test_ext_cookies_permissions_bad.html]
-[test_ext_cookies_permissions_good.html]
-[test_ext_cookies_containers.html]
-[test_ext_jsversion.html]
-[test_ext_schema.html]
-[test_chrome_ext_storage_cleanup.html]
-[test_chrome_ext_idle.html]
-[test_chrome_ext_downloads_saveAs.html]
-[test_chrome_ext_webrequest_background_events.html]
-skip-if = os == 'android' # webrequest api unsupported (bug 1258975).
diff --git a/toolkit/components/webextensions/test/mochitest/chrome_head.js b/toolkit/components/webextensions/test/mochitest/chrome_head.js
deleted file mode 100644
index da2f53a02..000000000
--- a/toolkit/components/webextensions/test/mochitest/chrome_head.js
+++ /dev/null
@@ -1,12 +0,0 @@
-"use strict";
-
-const {
-  classes: Cc,
-  interfaces: Ci,
-  utils: Cu,
-  results: Cr,
-} = Components;
-
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/NetUtil.jsm");
-
diff --git a/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page1.html b/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page1.html
deleted file mode 100644
index 663ebc611..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page1.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<body>
-
-<iframe src="file_WebNavigation_page2.html" width="200" height="200"></iframe>
-
-<form>
-</form>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page2.html b/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page2.html
deleted file mode 100644
index cc1acc83d..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page2.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<body>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page3.html b/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page3.html
deleted file mode 100644
index a0a26a2e9..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_WebNavigation_page3.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<body>
-
-<a id="elt" href="file_WebNavigation_page3.html#ref">click me</a>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_WebRequest_page3.html b/toolkit/components/webextensions/test/mochitest/file_WebRequest_page3.html
deleted file mode 100644
index 5807dd439..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_WebRequest_page3.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-<script>
-"use strict";
-window.close();
-</script>
-</head>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_csp.html b/toolkit/components/webextensions/test/mochitest/file_csp.html
deleted file mode 100644
index 206e44390..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_csp.html
+++ /dev/null
@@ -1,14 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-</head>
-<body>
-
-<div id="test">Sample text</div>
-<img id="bad-image" src="http://example.org/tests/toolkit/components/extensions/test/mochitest/file_image_bad.png" />
-<script id="bad-script" type="text/javascript" src="http://example.org/tests/toolkit/components/extensions/test/mochitest/file_script_bad.js"></script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_csp.html^headers^ b/toolkit/components/webextensions/test/mochitest/file_csp.html^headers^
deleted file mode 100644
index 4c6fa3c26..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_csp.html^headers^
+++ /dev/null
@@ -1 +0,0 @@
-Content-Security-Policy: default-src 'self'
diff --git a/toolkit/components/webextensions/test/mochitest/file_ext_test_api_injection.js b/toolkit/components/webextensions/test/mochitest/file_ext_test_api_injection.js
deleted file mode 100644
index 06dfae65e..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_ext_test_api_injection.js
+++ /dev/null
@@ -1,12 +0,0 @@
-"use strict";
-
-var {interfaces: Ci} = Components;
-
-Components.utils.import("resource://gre/modules/Services.jsm");
-
-Services.console.registerListener(function listener(message) {
-  if (/WebExt Privilege Escalation/.test(message.message)) {
-    Services.console.unregisterListener(listener);
-    sendAsyncMessage("console-message", {message: message.message});
-  }
-});
diff --git a/toolkit/components/webextensions/test/mochitest/file_image_bad.png b/toolkit/components/webextensions/test/mochitest/file_image_bad.png
deleted file mode 100644
index 4c3be5084..000000000
Binary files a/toolkit/components/webextensions/test/mochitest/file_image_bad.png and /dev/null differ
diff --git a/toolkit/components/webextensions/test/mochitest/file_image_good.png b/toolkit/components/webextensions/test/mochitest/file_image_good.png
deleted file mode 100644
index 769c63634..000000000
Binary files a/toolkit/components/webextensions/test/mochitest/file_image_good.png and /dev/null differ
diff --git a/toolkit/components/webextensions/test/mochitest/file_image_redirect.png b/toolkit/components/webextensions/test/mochitest/file_image_redirect.png
deleted file mode 100644
index 4c3be5084..000000000
Binary files a/toolkit/components/webextensions/test/mochitest/file_image_redirect.png and /dev/null differ
diff --git a/toolkit/components/webextensions/test/mochitest/file_mixed.html b/toolkit/components/webextensions/test/mochitest/file_mixed.html
deleted file mode 100644
index f3c7dda58..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_mixed.html
+++ /dev/null
@@ -1,13 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-</head>
-<body>
-
-<div id="test">Sample text</div>
-<img id="bad-image" src="http://example.com/tests/toolkit/components/extensions/test/mochitest/file_image_bad.png" />
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_permission_xhr.html b/toolkit/components/webextensions/test/mochitest/file_permission_xhr.html
deleted file mode 100644
index 22a55f90d..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_permission_xhr.html
+++ /dev/null
@@ -1,55 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-</head>
-<body>
-
-<script>
-"use strict";
-
-/* globals privilegedFetch, privilegedXHR */
-/* eslint-disable mozilla/balanced-listeners */
-
-addEventListener("message", function rcv(event) {
-  removeEventListener("message", rcv, false);
-
-  function assertTrue(condition, description) {
-    postMessage({msg: "assertTrue", condition, description}, "*");
-  }
-
-  function passListener() {
-    assertTrue(true, "Content XHR has no elevated privileges");
-    postMessage({"msg": "finish"}, "*");
-  }
-
-  function failListener() {
-    assertTrue(false, "Content XHR has no elevated privileges");
-    postMessage({"msg": "finish"}, "*");
-  }
-
-  try {
-    new privilegedXHR();
-    assertTrue(false, "Content should not have access to privileged XHR constructor");
-  } catch (e) {
-    assertTrue(/Permission denied to access object/.test(e), "Content should not have access to privileged XHR constructor");
-  }
-
-  try {
-    new privilegedFetch();
-    assertTrue(false, "Content should not have access to privileged fetch() constructor");
-  } catch (e) {
-    assertTrue(/Permission denied to access object/.test(e), "Content should not have access to privileged fetch() constructor");
-  }
-
-  let req = new XMLHttpRequest();
-  req.addEventListener("load", failListener);
-  req.addEventListener("error", passListener);
-  req.open("GET", "http://example.org/example.txt");
-  req.send();
-}, false);
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_privilege_escalation.html b/toolkit/components/webextensions/test/mochitest/file_privilege_escalation.html
deleted file mode 100644
index 258f7058d..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_privilege_escalation.html
+++ /dev/null
@@ -1,13 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-</head>
-<body>
-  <script type="text/javascript">
-    "use strict";
-    throw new Error(`WebExt Privilege Escalation: typeof(browser) = ${typeof(browser)}`);
-  </script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_sample.html b/toolkit/components/webextensions/test/mochitest/file_sample.html
deleted file mode 100644
index a20e49a1f..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_sample.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-</head>
-<body>
-
-<div id="test">Sample text</div>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_script_bad.js b/toolkit/components/webextensions/test/mochitest/file_script_bad.js
deleted file mode 100644
index c425122c7..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_script_bad.js
+++ /dev/null
@@ -1,3 +0,0 @@
-"use strict";
-
-window.failure = true;
diff --git a/toolkit/components/webextensions/test/mochitest/file_script_good.js b/toolkit/components/webextensions/test/mochitest/file_script_good.js
deleted file mode 100644
index 1848edf68..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_script_good.js
+++ /dev/null
@@ -1,3 +0,0 @@
-"use strict";
-
-window.success = window.success ? window.success + 1 : 1;
diff --git a/toolkit/components/webextensions/test/mochitest/file_script_redirect.js b/toolkit/components/webextensions/test/mochitest/file_script_redirect.js
deleted file mode 100644
index c89a196c2..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_script_redirect.js
+++ /dev/null
@@ -1,4 +0,0 @@
-"use strict";
-
-window.failure = true;
-
diff --git a/toolkit/components/webextensions/test/mochitest/file_script_xhr.js b/toolkit/components/webextensions/test/mochitest/file_script_xhr.js
deleted file mode 100644
index 07f80eb2e..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_script_xhr.js
+++ /dev/null
@@ -1,5 +0,0 @@
-"use strict";
-
-var request = new XMLHttpRequest();
-request.open("get", "http://mochi.test:8888/tests/toolkit/components/extensions/test/mochitest/xhr_resource", false);
-request.send();
diff --git a/toolkit/components/webextensions/test/mochitest/file_style_bad.css b/toolkit/components/webextensions/test/mochitest/file_style_bad.css
deleted file mode 100644
index 8dbc8dc7a..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_style_bad.css
+++ /dev/null
@@ -1,3 +0,0 @@
-#test {
-  color: green !important;
-}
diff --git a/toolkit/components/webextensions/test/mochitest/file_style_good.css b/toolkit/components/webextensions/test/mochitest/file_style_good.css
deleted file mode 100644
index 46f9774b5..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_style_good.css
+++ /dev/null
@@ -1,3 +0,0 @@
-#test {
-  color: red;
-}
diff --git a/toolkit/components/webextensions/test/mochitest/file_style_redirect.css b/toolkit/components/webextensions/test/mochitest/file_style_redirect.css
deleted file mode 100644
index 8dbc8dc7a..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_style_redirect.css
+++ /dev/null
@@ -1,3 +0,0 @@
-#test {
-  color: green !important;
-}
diff --git a/toolkit/components/webextensions/test/mochitest/file_teardown_test.js b/toolkit/components/webextensions/test/mochitest/file_teardown_test.js
deleted file mode 100644
index 7246012ad..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_teardown_test.js
+++ /dev/null
@@ -1,24 +0,0 @@
-"use strict";
-
-/* globals addMessageListener */
-let {Management} = Components.utils.import("resource://gre/modules/Extension.jsm", {});
-let events = [];
-function record(type, extensionContext) {
-  let eventType = type == "proxy-context-load" ? "load" : "unload";
-  let url = extensionContext.uri.spec;
-  let extensionId = extensionContext.extension.id;
-  events.push({eventType, url, extensionId});
-}
-
-Management.on("proxy-context-load", record);
-Management.on("proxy-context-unload", record);
-addMessageListener("cleanup", () => {
-  Management.off("proxy-context-load", record);
-  Management.off("proxy-context-unload", record);
-});
-
-addMessageListener("get-context-events", extensionId => {
-  sendAsyncMessage("context-events", events);
-  events = [];
-});
-sendAsyncMessage("chromescript-startup");
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect.html
deleted file mode 100644
index cba3043f7..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-  <head>
-    <meta http-equiv="refresh" content="1;dummy_page.html">
-  </head>
-  <body>
-  </body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html
deleted file mode 100644
index c5b436979..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-  <head>
-  </head>
-  <body>
-  </body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html^headers^ b/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html^headers^
deleted file mode 100644
index 574a392a1..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_clientRedirect_httpHeaders.html^headers^
+++ /dev/null
@@ -1 +0,0 @@
-Refresh: 1;url=dummy_page.html
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_frameClientRedirect.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_frameClientRedirect.html
deleted file mode 100644
index d360bcbb1..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_frameClientRedirect.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<body>
-
-<iframe src="file_webNavigation_clientRedirect.html" width="200" height="200"></iframe>
-
-<form>
-</form>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_frameRedirect.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_frameRedirect.html
deleted file mode 100644
index 06dbd4374..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_frameRedirect.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<body>
-
-<iframe src="redirection.sjs" width="200" height="200"></iframe>
-
-<form>
-</form>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe.html
deleted file mode 100644
index 307990714..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<body>
-
-<iframe src="file_webNavigation_manualSubframe_page1.html" width="200" height="200"></iframe>
-
-<form>
-</form>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page1.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page1.html
deleted file mode 100644
index 55bb7aa6a..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page1.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<!DOCTYPE html>
-
-<html>
-  <body>
-    <h1>page1</h1>
-    <a href="file_webNavigation_manualSubframe_page2.html">page2</a>
-  </body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page2.html b/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page2.html
deleted file mode 100644
index 8f589f8bb..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_webNavigation_manualSubframe_page2.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<!DOCTYPE html>
-
-<html>
-  <body>
-    <h1>page2</h1>
-  </body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/file_with_about_blank.html b/toolkit/components/webextensions/test/mochitest/file_with_about_blank.html
deleted file mode 100644
index af51c2e52..000000000
--- a/toolkit/components/webextensions/test/mochitest/file_with_about_blank.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<!doctype html>
-<html>
-<head>
-  <meta charset="utf-8">
-</head>
-<body>
-  <iframe id="a_b" src="about:blank"></iframe>
-  <iframe srcdoc="galactica actual" src="adama"></iframe>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/head.js b/toolkit/components/webextensions/test/mochitest/head.js
deleted file mode 100644
index 1b1a29472..000000000
--- a/toolkit/components/webextensions/test/mochitest/head.js
+++ /dev/null
@@ -1,13 +0,0 @@
-"use strict";
-
-/* exported waitForLoad */
-
-function waitForLoad(win) {
-  return new Promise(resolve => {
-    win.addEventListener("load", function listener() {
-      win.removeEventListener("load", listener, true);
-      resolve();
-    }, true);
-  });
-}
-
diff --git a/toolkit/components/webextensions/test/mochitest/head_cookies.js b/toolkit/components/webextensions/test/mochitest/head_cookies.js
deleted file mode 100644
index 9f6966551..000000000
--- a/toolkit/components/webextensions/test/mochitest/head_cookies.js
+++ /dev/null
@@ -1,167 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-/* exported testCookies */
-
-function* testCookies(options) {
-  // Changing the options object is a bit of a hack, but it allows us to easily
-  // pass an expiration date to the background script.
-  options.expiry = Date.now() / 1000 + 3600;
-
-  async function background(backgroundOptions) {
-    // Ask the parent scope to change some cookies we may or may not have
-    // permission for.
-    let awaitChanges = new Promise(resolve => {
-      browser.test.onMessage.addListener(msg => {
-        browser.test.assertEq("cookies-changed", msg, "browser.test.onMessage");
-        resolve();
-      });
-    });
-
-    let changed = [];
-    browser.cookies.onChanged.addListener(event => {
-      changed.push(`${event.cookie.name}:${event.cause}`);
-    });
-    browser.test.sendMessage("change-cookies");
-
-
-    // Try to access some cookies in various ways.
-    let {url, domain, secure} = backgroundOptions;
-
-    let failures = 0;
-    let tallyFailure = error => {
-      failures++;
-    };
-
-    try {
-      await awaitChanges;
-
-      let cookie = await browser.cookies.get({url, name: "foo"});
-      browser.test.assertEq(backgroundOptions.shouldPass, cookie != null, "should pass == get cookie");
-
-      let cookies = await browser.cookies.getAll({domain});
-      if (backgroundOptions.shouldPass) {
-        browser.test.assertEq(2, cookies.length, "expected number of cookies");
-      } else {
-        browser.test.assertEq(0, cookies.length, "expected number of cookies");
-      }
-
-      await Promise.all([
-        browser.cookies.set({url, domain, secure, name: "foo", "value": "baz", expirationDate: backgroundOptions.expiry}).catch(tallyFailure),
-        browser.cookies.set({url, domain, secure, name: "bar", "value": "quux", expirationDate: backgroundOptions.expiry}).catch(tallyFailure),
-        browser.cookies.remove({url, name: "deleted"}),
-      ]);
-
-      if (backgroundOptions.shouldPass) {
-        // The order of eviction events isn't guaranteed, so just check that
-        // it's there somewhere.
-        let evicted = changed.indexOf("evicted:evicted");
-        if (evicted < 0) {
-          browser.test.fail("got no eviction event");
-        } else {
-          browser.test.succeed("got eviction event");
-          changed.splice(evicted, 1);
-        }
-
-        browser.test.assertEq("x:explicit,x:overwrite,x:explicit,x:explicit,foo:overwrite,foo:explicit,bar:explicit,deleted:explicit",
-                              changed.join(","), "expected changes");
-      } else {
-        browser.test.assertEq("", changed.join(","), "expected no changes");
-      }
-
-      if (!(backgroundOptions.shouldPass || backgroundOptions.shouldWrite)) {
-        browser.test.assertEq(2, failures, "Expected failures");
-      } else {
-        browser.test.assertEq(0, failures, "Expected no failures");
-      }
-
-      browser.test.notifyPass("cookie-permissions");
-    } catch (error) {
-      browser.test.fail(`Error: ${error} :: ${error.stack}`);
-      browser.test.notifyFail("cookie-permissions");
-    }
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "permissions": options.permissions,
-    },
-
-    background: `(${background})(${JSON.stringify(options)})`,
-  });
-
-
-  let cookieSvc = SpecialPowers.Services.cookies;
-
-  let domain = options.domain.replace(/^\.?/, ".");
-
-  // This will be evicted after we add a fourth cookie.
-  cookieSvc.add(domain, "/", "evicted", "bar", options.secure, false, false, options.expiry);
-  // This will be modified by the background script.
-  cookieSvc.add(domain, "/", "foo", "bar", options.secure, false, false, options.expiry);
-  // This will be deleted by the background script.
-  cookieSvc.add(domain, "/", "deleted", "bar", options.secure, false, false, options.expiry);
-
-
-  yield extension.startup();
-
-  yield extension.awaitMessage("change-cookies");
-  cookieSvc.add(domain, "/", "x", "y", options.secure, false, false, options.expiry);
-  cookieSvc.add(domain, "/", "x", "z", options.secure, false, false, options.expiry);
-  cookieSvc.remove(domain, "x", "/", false, {});
-  extension.sendMessage("cookies-changed");
-
-  yield extension.awaitFinish("cookie-permissions");
-  yield extension.unload();
-
-
-  function getCookies(host) {
-    let cookies = [];
-    let enum_ = cookieSvc.getCookiesFromHost(host, {});
-    while (enum_.hasMoreElements()) {
-      cookies.push(enum_.getNext().QueryInterface(SpecialPowers.Ci.nsICookie2));
-    }
-    return cookies.sort((a, b) => String.localeCompare(a.name, b.name));
-  }
-
-  let cookies = getCookies(options.domain);
-  info(`Cookies: ${cookies.map(c => `${c.name}=${c.value}`)}`);
-
-  if (options.shouldPass) {
-    is(cookies.length, 2, "expected two cookies for host");
-
-    is(cookies[0].name, "bar", "correct cookie name");
-    is(cookies[0].value, "quux", "correct cookie value");
-
-    is(cookies[1].name, "foo", "correct cookie name");
-    is(cookies[1].value, "baz", "correct cookie value");
-  } else if (options.shouldWrite) {
-    // Note: |shouldWrite| applies only when |shouldPass| is false.
-    // This is necessary because, unfortunately, websites (and therefore web
-    // extensions) are allowed to write some cookies which they're not allowed
-    // to read.
-    is(cookies.length, 3, "expected three cookies for host");
-
-    is(cookies[0].name, "bar", "correct cookie name");
-    is(cookies[0].value, "quux", "correct cookie value");
-
-    is(cookies[1].name, "deleted", "correct cookie name");
-
-    is(cookies[2].name, "foo", "correct cookie name");
-    is(cookies[2].value, "baz", "correct cookie value");
-  } else {
-    is(cookies.length, 2, "expected two cookies for host");
-
-    is(cookies[0].name, "deleted", "correct second cookie name");
-
-    is(cookies[1].name, "foo", "correct cookie name");
-    is(cookies[1].value, "bar", "correct cookie value");
-  }
-
-  for (let cookie of cookies) {
-    cookieSvc.remove(cookie.host, cookie.name, "/", false, {});
-  }
-  // Make sure we don't silently poison subsequent tests if something goes wrong.
-  is(getCookies(options.domain).length, 0, "cookies cleared");
-}
diff --git a/toolkit/components/webextensions/test/mochitest/head_webrequest.js b/toolkit/components/webextensions/test/mochitest/head_webrequest.js
deleted file mode 100644
index 96924e505..000000000
--- a/toolkit/components/webextensions/test/mochitest/head_webrequest.js
+++ /dev/null
@@ -1,331 +0,0 @@
-"use strict";
-
-let commonEvents = {
-  "onBeforeRequest":     [{urls: ["<all_urls>"]}, ["blocking"]],
-  "onBeforeSendHeaders": [{urls: ["<all_urls>"]}, ["blocking", "requestHeaders"]],
-  "onSendHeaders":       [{urls: ["<all_urls>"]}, ["requestHeaders"]],
-  "onBeforeRedirect":    [{urls: ["<all_urls>"]}],
-  "onHeadersReceived":   [{urls: ["<all_urls>"]}, ["blocking", "responseHeaders"]],
-  "onResponseStarted":   [{urls: ["<all_urls>"]}],
-  "onCompleted":         [{urls: ["<all_urls>"]}, ["responseHeaders"]],
-  "onErrorOccurred":     [{urls: ["<all_urls>"]}],
-};
-
-function background(events) {
-  let expect;
-  let ignore;
-  let defaultOrigin;
-
-  browser.test.onMessage.addListener((msg, expected) => {
-    if (msg !== "set-expected") {
-      return;
-    }
-    expect = expected.expect;
-    defaultOrigin = expected.origin;
-    ignore = expected.ignore;
-    let promises = [];
-    // Initialize some stuff we'll need in the tests.
-    for (let entry of Object.values(expect)) {
-      // a place for the test infrastructure to store some state.
-      entry.test = {};
-      // Each entry in expected gets a Promise that will be resolved in the
-      // last event for that entry.  This will either be onCompleted, or the
-      // last entry if an events list was provided.
-      promises.push(new Promise(resolve => { entry.test.resolve = resolve; }));
-      // If events was left undefined, we're expecting all normal events we're
-      // listening for, exclude onBeforeRedirect and onErrorOccurred
-      if (entry.events === undefined) {
-        entry.events = Object.keys(events).filter(name => name != "onErrorOccurred" && name != "onBeforeRedirect");
-      }
-      if (entry.optional_events === undefined) {
-        entry.optional_events = [];
-      }
-    }
-    // When every expected entry has finished our test is done.
-    Promise.all(promises).then(() => {
-      browser.test.sendMessage("done");
-    });
-    browser.test.sendMessage("continue");
-  });
-
-  // Retrieve the per-file/test expected values.
-  function getExpected(details) {
-    let url = new URL(details.url);
-    let filename;
-    if (url.protocol == "data:") {
-      // pathname is everything after protocol.
-      filename = url.pathname;
-    } else {
-      filename = url.pathname.split("/").pop();
-    }
-    if (ignore && ignore.includes(filename)) {
-      return;
-    }
-    let expected = expect[filename];
-    if (!expected) {
-      browser.test.fail(`unexpected request ${filename}`);
-      return;
-    }
-    // Save filename for redirect verification.
-    expected.test.filename = filename;
-    return expected;
-  }
-
-  // Process any test header modifications that can happen in request or response phases.
-  // If a test includes headers, it needs a complete header object, no undefined
-  // objects even if empty:
-  // request: {
-  //   add: {"HeaderName": "value",},
-  //   modify: {"HeaderName": "value",},
-  //   remove: ["HeaderName",],
-  // },
-  // response: {
-  //   add: {"HeaderName": "value",},
-  //   modify: {"HeaderName": "value",},
-  //   remove: ["HeaderName",],
-  // },
-  function processHeaders(phase, expected, details) {
-    // This should only happen once per phase [request|response].
-    browser.test.assertFalse(!!expected.test[phase], `First processing of headers for ${phase}`);
-    expected.test[phase] = true;
-
-    let headers = details[`${phase}Headers`];
-    browser.test.assertTrue(Array.isArray(headers), `${phase}Headers array present`);
-
-    let {add, modify, remove} = expected.headers[phase];
-
-    for (let name in add) {
-      browser.test.assertTrue(!headers.find(h => h.name === name), `header ${name} to be added not present yet in ${phase}Headers`);
-      let header = {name: name};
-      if (name.endsWith("-binary")) {
-        header.binaryValue = Array.from(add[name], c => c.charCodeAt(0));
-      } else {
-        header.value = add[name];
-      }
-      headers.push(header);
-    }
-
-    let modifiedAny = false;
-    for (let header of headers) {
-      if (header.name.toLowerCase() in modify) {
-        header.value = modify[header.name.toLowerCase()];
-        modifiedAny = true;
-      }
-    }
-    browser.test.assertTrue(modifiedAny, `at least one ${phase}Headers element to modify`);
-
-    let deletedAny = false;
-    for (let j = headers.length; j-- > 0;) {
-      if (remove.includes(headers[j].name.toLowerCase())) {
-        headers.splice(j, 1);
-        deletedAny = true;
-      }
-    }
-    browser.test.assertTrue(deletedAny, `at least one ${phase}Headers element to delete`);
-
-    return headers;
-  }
-
-  // phase is request or response.
-  function checkHeaders(phase, expected, details) {
-    if (!/^https?:/.test(details.url)) {
-      return;
-    }
-
-    let headers = details[`${phase}Headers`];
-    browser.test.assertTrue(Array.isArray(headers), `valid ${phase}Headers array`);
-
-    let {add, modify, remove} = expected.headers[phase];
-    for (let name in add) {
-      let value = headers.find(h => h.name.toLowerCase() === name.toLowerCase()).value;
-      browser.test.assertEq(value, add[name], `header ${name} correctly injected in ${phase}Headers`);
-    }
-
-    for (let name in modify) {
-      let value = headers.find(h => h.name.toLowerCase() === name.toLowerCase()).value;
-      browser.test.assertEq(value, modify[name], `header ${name} matches modified value`);
-    }
-
-    for (let name of remove) {
-      let found = headers.find(h => h.name.toLowerCase() === name.toLowerCase());
-      browser.test.assertFalse(!!found, `deleted header ${name} still found in ${phase}Headers`);
-    }
-  }
-
-  function getListener(name) {
-    return details => {
-      let result = {};
-      browser.test.log(`${name} ${details.requestId} ${details.url}`);
-      let expected = getExpected(details);
-      if (!expected) {
-        return result;
-      }
-      let expectedEvent = expected.events[0] == name;
-      if (expectedEvent) {
-        expected.events.shift();
-      } else {
-        expectedEvent = expected.optional_events[0] == name;
-        if (expectedEvent) {
-          expected.optional_events.shift();
-        }
-      }
-      browser.test.assertTrue(expectedEvent, `received ${name}`);
-      browser.test.assertEq(expected.type, details.type, "resource type is correct");
-      browser.test.assertEq(expected.origin || defaultOrigin, details.originUrl, "origin is correct");
-
-      if (name == "onBeforeRequest") {
-        // Save some values to test request consistency in later events.
-        browser.test.assertTrue(details.tabId !== undefined, `tabId ${details.tabId}`);
-        browser.test.assertTrue(details.requestId !== undefined, `requestId ${details.requestId}`);
-        // Validate requestId if it's already set, this happens with redirects.
-        if (expected.test.requestId !== undefined) {
-          browser.test.assertEq("string", typeof expected.test.requestId, `requestid ${expected.test.requestId} is string`);
-          browser.test.assertEq("string", typeof details.requestId, `requestid ${details.requestId} is string`);
-          browser.test.assertEq("number", typeof parseInt(details.requestId, 10), "parsed requestid is number");
-          browser.test.assertNotEq(expected.test.requestId, details.requestId,
-                                  `last requestId ${expected.test.requestId} different from this one ${details.requestId}`);
-        } else {
-          // Save any values we want to validate in later events.
-          expected.test.requestId = details.requestId;
-          expected.test.tabId = details.tabId;
-        }
-        // Tests we don't need to do every event.
-        browser.test.assertTrue(details.type.toUpperCase() in browser.webRequest.ResourceType, `valid resource type ${details.type}`);
-        if (details.type == "main_frame") {
-          browser.test.assertEq(0, details.frameId, "frameId is zero when type is main_frame bug 1329299");
-        }
-      } else {
-        // On events after onBeforeRequest, check the previous values.
-        browser.test.assertEq(expected.test.requestId, details.requestId, "correct requestId");
-        browser.test.assertEq(expected.test.tabId, details.tabId, "correct tabId");
-      }
-      if (name == "onBeforeSendHeaders") {
-        if (expected.headers && expected.headers.request) {
-          result.requestHeaders = processHeaders("request", expected, details);
-        }
-        if (expected.redirect) {
-          browser.test.log(`${name} redirect request`);
-          result.redirectUrl = details.url.replace(expected.test.filename, expected.redirect);
-        }
-      }
-      if (name == "onSendHeaders") {
-        if (expected.headers && expected.headers.request) {
-          checkHeaders("request", expected, details);
-        }
-      }
-      if (name == "onHeadersReceived") {
-        browser.test.assertEq(expected.status || 200, details.statusCode,
-                              `expected HTTP status received for ${details.url}`);
-        if (expected.headers && expected.headers.response) {
-          result.responseHeaders = processHeaders("response", expected, details);
-        }
-      }
-      if (name == "onCompleted") {
-        // If we have already completed a GET request for this url,
-        // and it was found, we expect for the response to come fromCache.
-        // expected.cached may be undefined, force boolean.
-        let expectCached = !!expected.cached && details.method === "GET" && details.statusCode != 404;
-        browser.test.assertEq(expectCached, details.fromCache, "fromCache is correct");
-        // We can only tell IPs for non-cached HTTP requests.
-        if (!details.fromCache && /^https?:/.test(details.url)) {
-          browser.test.assertEq("127.0.0.1", details.ip, `correct ip for ${details.url}`);
-        }
-        if (expected.headers && expected.headers.response) {
-          checkHeaders("response", expected, details);
-        }
-      }
-
-      if (expected.cancel && expected.cancel == name) {
-        browser.test.log(`${name} cancel request`);
-        browser.test.sendMessage("cancelled");
-        result.cancel = true;
-      }
-      // If we've used up all the events for this test, resolve the promise.
-      // If something wrong happens and more events come through, there will be
-      // failures.
-      if (expected.events.length <= 0) {
-        expected.test.resolve();
-      }
-      return result;
-    };
-  }
-
-  for (let [name, args] of Object.entries(events)) {
-    browser.test.log(`adding listener for ${name}`);
-    try {
-      browser.webRequest[name].addListener(getListener(name), ...args);
-    } catch (e) {
-      browser.test.assertTrue(/\brequestBody\b/.test(e.message),
-                              "Request body is unsupported");
-
-      // RequestBody is disabled in release builds.
-      if (!/\brequestBody\b/.test(e.message)) {
-        throw e;
-      }
-
-      args.splice(args.indexOf("requestBody"), 1);
-      browser.webRequest[name].addListener(getListener(name), ...args);
-    }
-  }
-}
-
-/* exported makeExtension */
-
-function makeExtension(events = commonEvents) {
-  return ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "webRequestBlocking",
-        "<all_urls>",
-      ],
-    },
-    background: `(${background})(${JSON.stringify(events)})`,
-  });
-}
-
-/* exported addStylesheet */
-
-function addStylesheet(file) {
-  let link = document.createElement("link");
-  link.setAttribute("rel", "stylesheet");
-  link.setAttribute("href", file);
-  document.body.appendChild(link);
-}
-
-/* exported addLink */
-
-function addLink(file) {
-  let a = document.createElement("a");
-  a.setAttribute("href", file);
-  a.setAttribute("target", "_blank");
-  document.body.appendChild(a);
-  return a;
-}
-
-/* exported addImage */
-
-function addImage(file) {
-  let img = document.createElement("img");
-  img.setAttribute("src", file);
-  document.body.appendChild(img);
-}
-
-/* exported addScript */
-
-function addScript(file) {
-  let script = document.createElement("script");
-  script.setAttribute("type", "text/javascript");
-  script.setAttribute("src", file);
-  document.getElementsByTagName("head").item(0).appendChild(script);
-}
-
-/* exported addFrame */
-
-function addFrame(file) {
-  let frame = document.createElement("iframe");
-  frame.setAttribute("width", "200");
-  frame.setAttribute("height", "200");
-  frame.setAttribute("src", file);
-  document.body.appendChild(frame);
-}
diff --git a/toolkit/components/webextensions/test/mochitest/mochitest.ini b/toolkit/components/webextensions/test/mochitest/mochitest.ini
deleted file mode 100644
index 1f61060ad..000000000
--- a/toolkit/components/webextensions/test/mochitest/mochitest.ini
+++ /dev/null
@@ -1,115 +0,0 @@
-[DEFAULT]
-support-files =
-  head.js
-  file_mixed.html
-  head_webrequest.js
-  file_csp.html
-  file_csp.html^headers^
-  file_WebRequest_page3.html
-  file_webNavigation_clientRedirect.html
-  file_webNavigation_clientRedirect_httpHeaders.html
-  file_webNavigation_clientRedirect_httpHeaders.html^headers^
-  file_webNavigation_frameClientRedirect.html
-  file_webNavigation_frameRedirect.html
-  file_webNavigation_manualSubframe.html
-  file_webNavigation_manualSubframe_page1.html
-  file_webNavigation_manualSubframe_page2.html
-  file_WebNavigation_page1.html
-  file_WebNavigation_page2.html
-  file_WebNavigation_page3.html
-  file_with_about_blank.html
-  file_image_good.png
-  file_image_bad.png
-  file_image_redirect.png
-  file_style_good.css
-  file_style_bad.css
-  file_style_redirect.css
-  file_script_good.js
-  file_script_bad.js
-  file_script_redirect.js
-  file_script_xhr.js
-  file_sample.html
-  redirection.sjs
-  file_privilege_escalation.html
-  file_ext_test_api_injection.js
-  file_permission_xhr.html
-  file_teardown_test.js
-  return_headers.sjs
-  webrequest_worker.js
-tags = webextensions
-
-[test_clipboard.html]
-# skip-if = # disabled test case with_permission_allow_copy, see inline comment.
-[test_ext_inIncognitoContext_window.html]
-skip-if = os == 'android' # Android does not currently support windows.
-[test_ext_geturl.html]
-[test_ext_background_canvas.html]
-[test_ext_content_security_policy.html]
-[test_ext_contentscript.html]
-[test_ext_contentscript_api_injection.html]
-[test_ext_contentscript_async_loading.html]
-[test_ext_contentscript_context.html]
-[test_ext_contentscript_create_iframe.html]
-[test_ext_contentscript_devtools_metadata.html]
-[test_ext_contentscript_exporthelpers.html]
-[test_ext_contentscript_css.html]
-[test_ext_contentscript_about_blank.html]
-[test_ext_contentscript_permission.html]
-skip-if = os == 'android' # Android does not support tabs API. Bug 1260250
-[test_ext_contentscript_teardown.html]
-skip-if = (os == 'android') # Android does not support tabs API. Bug 1260250
-[test_ext_exclude_include_globs.html]
-[test_ext_external_messaging.html]
-[test_ext_i18n_css.html]
-[test_ext_generate.html]
-[test_ext_notifications.html]
-[test_ext_permission_xhr.html]
-[test_ext_runtime_connect.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_runtime_connect_twoway.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_runtime_connect2.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_runtime_disconnect.html]
-[test_ext_runtime_id.html]
-[test_ext_sandbox_var.html]
-[test_ext_sendmessage_reply.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_sendmessage_reply2.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_sendmessage_doublereply.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_sendmessage_no_receiver.html]
-[test_ext_storage_content.html]
-[test_ext_storage_tab.html]
-skip-if = os == 'android' # Android does not currently support tabs.
-[test_ext_test.html]
-[test_ext_cookies.html]
-skip-if = os == 'android' # Bug 1258975 on android.
-[test_ext_background_api_injection.html]
-[test_ext_background_generated_url.html]
-[test_ext_background_teardown.html]
-[test_ext_tab_teardown.html]
-skip-if = (os == 'android') # Android does not support tabs API. Bug 1260250
-[test_ext_unload_frame.html]
-[test_ext_i18n.html]
-skip-if = (os == 'android') # Bug 1258975 on android.
-[test_ext_listener_proxies.html]
-[test_ext_web_accessible_resources.html]
-skip-if = (os == 'android') # Bug 1258975 on android.
-[test_ext_webrequest_background_events.html]
-skip-if = os == 'android' # webrequest api unsupported (bug 1258975).
-[test_ext_webrequest_basic.html]
-skip-if = os == 'android' # webrequest api unsupported (bug 1258975).
-[test_ext_webrequest_suspend.html]
-skip-if = os == 'android' # webrequest api unsupported (bug 1258975).
-[test_ext_webrequest_upload.html]
-skip-if = release_or_beta || os == 'android' # webrequest api unsupported (bug 1258975).
-[test_ext_webnavigation.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_webnavigation_filters.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_window_postMessage.html]
-[test_ext_subframes_privileges.html]
-skip-if = os == 'android' # port.sender.tab is undefined on Android (bug 1258975).
-[test_ext_xhr_capabilities.html]
diff --git a/toolkit/components/webextensions/test/mochitest/redirection.sjs b/toolkit/components/webextensions/test/mochitest/redirection.sjs
deleted file mode 100644
index 370ecd213..000000000
--- a/toolkit/components/webextensions/test/mochitest/redirection.sjs
+++ /dev/null
@@ -1,4 +0,0 @@
-function handleRequest(aRequest, aResponse) {
-  aResponse.setStatusLine(aRequest.httpVersion, 302);
-  aResponse.setHeader("Location", "./dummy_page.html");
-}
diff --git a/toolkit/components/webextensions/test/mochitest/return_headers.sjs b/toolkit/components/webextensions/test/mochitest/return_headers.sjs
deleted file mode 100644
index 54e2e5fb4..000000000
--- a/toolkit/components/webextensions/test/mochitest/return_headers.sjs
+++ /dev/null
@@ -1,20 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set ft=javascript sts=2 sw=2 et tw=80: */
-"use strict";
-
-/* exported handleRequest */
-
-function handleRequest(request, response) {
-  response.setHeader("Content-Type", "text/plain", false);
-
-  let headers = {};
-  // Why on earth is this a nsISimpleEnumerator...
-  let enumerator = request.headers;
-  while (enumerator.hasMoreElements()) {
-    let header = enumerator.getNext().data;
-    headers[header.toLowerCase()] = request.getHeader(header);
-  }
-
-  response.write(JSON.stringify(headers));
-}
-
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_debug_global.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_debug_global.html
deleted file mode 100644
index 0edf5ea86..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_debug_global.html
+++ /dev/null
@@ -1,166 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-Cu.import("resource://devtools/client/framework/ToolboxProcess.jsm");
-Cu.import("resource://gre/modules/AddonManager.jsm");
-
-const {
-  XPIProvider,
-} = Components.utils.import("resource://gre/modules/addons/XPIProvider.jsm");
-
-/**
- * This test is asserting that ext-backgroundPage.js successfully sets its
- * debug global in the AddonWrapper provided by XPIProvider.jsm
- *
- * It does _not_ test any functionality in devtools and does not guarantee
- * debugging is actually working correctly end-to-end.
- */
-
-function background() {
-  window.testThing = "test!";
-  browser.test.notifyPass("background script ran");
-}
-
-const ID = "debug@tests.mozilla.org";
-let extensionData = {
-  useAddonManager: "temporary",
-  background,
-  manifest: {
-    applications: {gecko: {id: ID}},
-  },
-};
-
-add_task(function* () {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitFinish("background script ran");
-
-  yield new Promise(function(resolve) {
-    window.BrowserToolboxProcess.emit("connectionchange", "opened", {
-      setAddonOptions(id, options) {
-        if (id === ID) {
-          let context = Cu.waiveXrays(options.global);
-          ok(context.chrome, "global context has a chrome object");
-          ok(context.browser, "global context has a browser object");
-          is("test!", context.testThing, "global context is the background script context");
-          resolve();
-        }
-      },
-    });
-  });
-
-  let addon = yield new Promise((resolve, reject) => {
-    AddonManager.getAddonByID(ID, addon => addon ? resolve(addon) : reject());
-  });
-
-  ok(addon, `Got the addon wrapper for ${addon.id}`);
-
-  function waitForDebugGlobalChanges(times, initialAddonInstanceID) {
-    return new Promise((resolve) => {
-      AddonManager.addAddonListener({
-        count: 0,
-        notNullGlobalsCount: 0,
-        undefinedPrivateWrappersCount: 0,
-        lastAddonInstanceID: initialAddonInstanceID,
-        onPropertyChanged(newAddon, changedPropNames) {
-          if (newAddon.id != addon.id ||
-              !changedPropNames.includes("debugGlobal")) {
-            return;
-          }
-
-          ok(!(newAddon.setDebugGlobal) && !(newAddon.getDebugGlobal),
-             "The addon wrapper should not be a PrivateWrapper");
-
-          let activeAddon = XPIProvider.activeAddons.get(addon.id);
-
-          let addonInstanceID;
-
-          if (!activeAddon) {
-            // The addon has been disable, the preferred global should be null
-            addonInstanceID = this.lastAddonInstanceID;
-            delete this.lastAddonInstanceID;
-          } else {
-            addonInstanceID = activeAddon.instanceID;
-            this.lastAddonInstanceID = addonInstanceID;
-          }
-
-          ok(addonInstanceID, `Got the addon instanceID for ${addon.id}`);
-
-          AddonManager.getAddonByInstanceID(addonInstanceID).then((privateWrapper) => {
-            this.count += 1;
-
-            if (!privateWrapper) {
-              // The addon has been uninstalled
-              this.undefinedPrivateWrappersCount += 1;
-            } else {
-              ok((privateWrapper.getDebugGlobal), "Got the addon PrivateWrapper");
-
-              if (privateWrapper.getDebugGlobal()) {
-                this.notNullGlobalsCount += 1;
-              }
-            }
-
-            if (this.count == times) {
-              AddonManager.removeAddonListener(this);
-              resolve({
-                counters: {
-                  count: this.count,
-                  notNullGlobalsCount: this.notNullGlobalsCount,
-                  undefinedPrivateWrappersCount: this.undefinedPrivateWrappersCount,
-                },
-                lastAddonInstanceID: this.lastAddonInstanceID,
-              });
-            }
-          });
-        },
-      });
-    });
-  }
-
-  // two calls expected, one for the shutdown and one for the startup
-  // of the background page.
-  let waitForDebugGlobalChangesOnReload = waitForDebugGlobalChanges(2);
-
-  info("Addon reload...");
-  yield addon.reload();
-
-  info("Addon completed startup after reload");
-
-  let {
-    counters: reloadCounters,
-    lastAddonInstanceID,
-  } = yield waitForDebugGlobalChangesOnReload;
-
-  isDeeply(reloadCounters, {count: 2, notNullGlobalsCount: 1, undefinedPrivateWrappersCount: 0},
-           "Got the expected number of onPropertyChanged calls on reload");
-
-  // one more call expected for the shutdown.
-  let waitForDebugGlobalChangesOnShutdown = waitForDebugGlobalChanges(1, lastAddonInstanceID);
-
-  info("extension unloading...");
-  yield extension.unload();
-  info("extension unloaded");
-
-  let {counters: unloadCounters} = yield waitForDebugGlobalChangesOnShutdown;
-
-  isDeeply(unloadCounters, {count: 1, notNullGlobalsCount: 0, undefinedPrivateWrappersCount: 1},
-           "Got the expected number of onPropertyChanged calls on shutdown");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_page.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_page.html
deleted file mode 100644
index 471c5339d..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_background_page.html
+++ /dev/null
@@ -1,84 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-Cu.import("resource://testing-common/TestUtils.jsm");
-
-/* eslint-disable mozilla/balanced-listeners */
-
-add_task(function* testAlertNotShownInBackgroundWindow() {
-  ok(!Services.wm.getEnumerator("alert:alert").hasMoreElements(),
-     "Alerts should not be present at the start of the test.");
-
-  let consoleOpened = TestUtils.topicObserved("web-console-created");
-
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: function() {
-      browser.test.log("background script executed");
-
-      alert("I am an alert in the background.");
-
-      browser.test.notifyPass("alertCalled");
-    },
-  });
-
-  yield extension.startup();
-
-  info("startup complete loaded");
-
-  yield extension.awaitFinish("alertCalled");
-
-
-  let alertWindows = Services.wm.getEnumerator("alert:alert");
-  ok(!alertWindows.hasMoreElements(), "Should not show alert");
-
-
-  // Make sure the message we output to the console is seen.
-  // This message is in ext-backgroundPage.js
-  let events = Cc["@mozilla.org/consoleAPI-storage;1"]
-    .getService(Ci.nsIConsoleAPIStorage).getEvents();
-
-  // This is the warning that is output after the first `alert()` call is made.
-  let alertWarningEvent = events[events.length - 2];
-  is(alertWarningEvent.arguments[0], "alert() is not supported in background windows; please use console.log instead.");
-
-  // This is the actual alert text that should be present in the console
-  // instead of as an `alert`.
-  let alertEvent = events[events.length - 1];
-  is(alertEvent.arguments[0], "I am an alert in the background.");
-
-
-  // Wait for the browser console window to open.
-  yield consoleOpened;
-
-  let {require} = Cu.import("resource://devtools/shared/Loader.jsm", {});
-  require("devtools/client/framework/devtools-browser");
-  let {HUDService} = require("devtools/client/webconsole/hudservice");
-
-  // And then double check that we have an actual browser console.
-  let haveConsole = !!HUDService.getBrowserConsole();
-  ok(haveConsole, "Expected browser console to be open");
-
-  if (haveConsole) {
-    yield HUDService.toggleBrowserConsole();
-  }
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_contentscript_unrecognizedprop_warning.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_contentscript_unrecognizedprop_warning.html
deleted file mode 100644
index e08121a8f..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_contentscript_unrecognizedprop_warning.html
+++ /dev/null
@@ -1,80 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script unrecognized property on manifest</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-const BASE = "http://mochi.test:8888/chrome/toolkit/components/extensions/test/mochitest";
-
-add_task(function* test_contentscript() {
-  function background() {
-    browser.runtime.onMessage.addListener(async (msg) => {
-      if (msg == "loaded") {
-        // NOTE: we're removing the tab from here because doing a win.close()
-        // from the chrome test code is raising a "TypeError: can't access
-        // dead object" exception.
-        let tabs = await browser.tabs.query({active: true, currentWindow: true});
-        await browser.tabs.remove(tabs[0].id);
-
-        browser.test.notifyPass("content-script-loaded");
-      }
-    });
-  }
-
-  function contentScript() {
-    chrome.runtime.sendMessage("loaded");
-  }
-
-  let extensionData = {
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-          "run_at": "document_idle",
-          "unrecognized_property": "with-a-random-value",
-        },
-      ],
-    },
-    background,
-
-    files: {
-      "content_script.js": contentScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  SimpleTest.waitForExplicitFinish();
-  let waitForConsole = new Promise(resolve => {
-    SimpleTest.monitorConsole(resolve, [{
-      message: /Reading manifest: Error processing content_scripts.*.unrecognized_property: An unexpected property was found/,
-    }]);
-  });
-
-  yield extension.startup();
-
-  window.open(`${BASE}/file_sample.html`);
-
-  yield Promise.all([extension.awaitFinish("content-script-loaded")]);
-  info("test page loaded");
-
-  yield extension.unload();
-
-  SimpleTest.endMonitorConsole();
-  yield waitForConsole;
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_downloads_saveAs.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_downloads_saveAs.html
deleted file mode 100644
index c1aaae035..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_downloads_saveAs.html
+++ /dev/null
@@ -1,68 +0,0 @@
-<!doctype html>
-<html>
-<head>
-  <title>Test downloads.download() saveAs option</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_downloads_saveAs() {
-  function background() {
-    const url = URL.createObjectURL(new Blob(["file content"]));
-    browser.test.onMessage.addListener(async () => {
-      try {
-        let id = await browser.downloads.download({url, saveAs: true});
-        browser.downloads.onChanged.addListener(delta => {
-          if (delta.state.current === "complete") {
-            browser.test.sendMessage("done", {ok: true, id});
-          }
-        });
-      } catch ({message}) {
-        browser.test.sendMessage("done", {ok: false, message});
-      }
-    });
-    browser.test.sendMessage("ready");
-  }
-
-  const {MockFilePicker} = SpecialPowers;
-  const manifest = {background, manifest: {permissions: ["downloads"]}};
-  const extension = ExtensionTestUtils.loadExtension(manifest);
-
-  MockFilePicker.init(window);
-  MockFilePicker.useAnyFile();
-  const [file] = MockFilePicker.returnFiles;
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage("download");
-  let result = yield extension.awaitMessage("done");
-
-  ok(result.ok, "downloads.download() works with saveAs");
-  is(file.fileSize, 12, "downloaded file is the correct size");
-  file.remove(false);
-
-  // Test the user canceling the save dialog.
-  MockFilePicker.returnValue = MockFilePicker.returnCancel;
-
-  extension.sendMessage("download");
-  result = yield extension.awaitMessage("done");
-
-  ok(!result.ok, "download rejected if the user cancels the dialog");
-  is(result.message, "Download canceled by the user", "with the correct message");
-  ok(!file.exists(), "file was not downloaded");
-
-  yield extension.unload();
-  MockFilePicker.cleanup();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_eventpage_warning.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_eventpage_warning.html
deleted file mode 100644
index ecea8237e..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_eventpage_warning.html
+++ /dev/null
@@ -1,106 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for WebExtension EventPage Warning</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function createEventPageExtension(eventPage) {
-  function eventPageScript() {
-    browser.test.log("running event page as background script");
-    browser.test.sendMessage("running", 1);
-  }
-
-  return ExtensionTestUtils.loadExtension({
-    manifest: {
-      "background": eventPage,
-    },
-    files: {
-      "event-page-script.js": eventPageScript,
-      "event-page.html": `<html><head>
-        <meta charset="utf-8">
-        <script src="event-page-script.js"><\/script>
-      </head></html>`,
-    },
-  });
-}
-
-add_task(function* test_eventpages() {
-  // Used in other tests to prevent the monitorConsole to grip.
-  SimpleTest.waitForExplicitFinish();
-
-  let testCases = [
-    {
-      message: "testing event page running as a background page",
-      eventPage: {
-        "page": "event-page.html",
-        "persistent": false,
-      },
-    },
-    {
-      message: "testing event page scripts running as a background page",
-      eventPage: {
-        "scripts": ["event-page-script.js"],
-        "persistent": false,
-      },
-    },
-  ];
-
-  for (let {message, eventPage} of testCases) {
-    info(message);
-
-    // Wait for the expected logged warnings from the manifest validation.
-    let waitForConsole = new Promise(resolve => {
-      SimpleTest.monitorConsole(resolve, [{message: /Event pages are not currently supported./}]);
-    });
-
-    let extension = createEventPageExtension(eventPage);
-
-    info("load complete");
-    let [, x] = yield Promise.all([extension.startup(), extension.awaitMessage("running")]);
-    is(x, 1, "got correct value from extension");
-    info("test complete");
-    yield extension.unload();
-    info("extension unloaded successfully");
-
-    SimpleTest.endMonitorConsole();
-    yield waitForConsole;
-
-    waitForConsole = new Promise(resolve => {
-      SimpleTest.monitorConsole(resolve, [{
-        message: /Reading manifest: Error processing background.nonExistentProp: An unexpected property was found/,
-      }]);
-    });
-
-    info("testing additional unrecognized properties on background page");
-
-    extension = createEventPageExtension({
-      "scripts": ["event-page-script.js"],
-      "nonExistentProp": true,
-    });
-
-    info("load complete");
-    [, x] = yield Promise.all([extension.startup(), extension.awaitMessage("running")]);
-    is(x, 1, "got correct value from extension");
-    info("test complete");
-    yield extension.unload();
-    info("extension unloaded successfully");
-
-    SimpleTest.endMonitorConsole();
-    yield waitForConsole;
-  }
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_hybrid_addons.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_hybrid_addons.html
deleted file mode 100644
index a74c551f0..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_hybrid_addons.html
+++ /dev/null
@@ -1,141 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for hybrid addons: SDK or bootstrap.js + embedded WebExtension</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/**
- * This test contains additional tests that ensure that an SDK hybrid addon
- * which is using the new module loader can embed a webextension correctly:
- *
- * while the other tests related to the "Embedded WebExtension" are focused
- * on unit testing a specific component, these tests are testing that a complete
- * hybrid SDK addon works as expected.
- *
- * NOTE: this tests are also the only ones which tests an SDK hybrid addon that
- * uses the new module loader (the one actually used in production by real world
- * addons these days), while the Addon SDK "embedded-webextension" test addon
- * uses the old deprecated module loader (as all the other Addon SDK test addons).
- */
-
-function generateClassicExtensionFiles({id, files}) {
-  // The addon install.rdf file, as it would be generated by jpm from the addon
-  // package.json metadata.
-  files["install.rdf"] = `<?xml version="1.0" encoding="utf-8"?>
-    <RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-         xmlns:em="http://www.mozilla.org/2004/em-rdf#">
-      <Description about="urn:mozilla:install-manifest">
-        <em:id>${id}</em:id>
-        <em:type>2</em:type>
-        <em:bootstrap>true</em:bootstrap>
-        <em:hasEmbeddedWebExtension>true</em:hasEmbeddedWebExtension>
-        <em:unpack>false</em:unpack>
-        <em:version>0.1.0</em:version>
-        <em:name>Fake Hybrid Addon</em:name>
-        <em:description>A fake hybrid addon</em:description>
-
-        <!-- Firefox -->
-        <em:targetApplication>
-          <Description>
-            <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
-            <em:minVersion>51.0a1</em:minVersion>
-            <em:maxVersion>*</em:maxVersion>
-          </Description>
-        </em:targetApplication>
-
-        <!-- Fennec -->
-        <em:targetApplication>
-          <Description>
-            <em:id>{aa3c5121-dab2-40e2-81ca-7ea25febc110}</em:id>
-            <em:minVersion>51.0a1</em:minVersion>
-            <em:maxVersion>*</em:maxVersion>
-          </Description>
-        </em:targetApplication>
-      </Description>
-    </RDF>`;
-
-  // The addon package.json file.
-  files["package.json"] = `{
-    "id": "${id}",
-    "name": "hybrid-addon",
-    "version": "0.1.0",
-    "description": "A fake hybrid addon",
-    "main": "index.js",
-    "engines": {
-      "firefox": ">= 51.0a1",
-      "fennec": ">= 51.0a1"
-    },
-    "license": "MPL-2.0",
-    "hasEmbeddedWebExtension": true
-  }`;
-
-  // The bootstrap file that jpm bundle in any SDK addon built with it.
-  files["bootstrap.js"] = `
-    const { utils: Cu } = Components;
-    const rootURI = __SCRIPT_URI_SPEC__.replace("bootstrap.js", "");
-    const COMMONJS_URI = "resource://gre/modules/commonjs";
-    const { require } = Cu.import(COMMONJS_URI + "/toolkit/require.js", {});
-    const { Bootstrap } = require(COMMONJS_URI + "/sdk/addon/bootstrap.js");
-    var { startup, shutdown, install, uninstall } = new Bootstrap(rootURI);
-  `;
-
-  return files;
-}
-
-add_task(function* test_sdk_hybrid_addon_with_jpm_module_loader() {
-  function backgroundScript() {
-    browser.runtime.sendMessage("background message", (reply) => {
-      browser.test.assertEq("sdk received message: background message", reply,
-                            "Got the expected reply from the SDK context");
-      browser.test.notifyPass("sdk.webext-api.onmessage");
-    });
-  }
-
-  async function sdkMainScript() {
-    /* globals require */
-    const webext = require("sdk/webextension");
-    let {browser} = await webext.startup();
-    browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-      sendReply(`sdk received message: ${msg}`);
-    });
-  }
-
-  let id = "fake@sdk.hybrid.addon";
-  let extension = ExtensionTestUtils.loadExtension({
-    useAddonManager: "temporary",
-    files: generateClassicExtensionFiles({
-      id,
-      files: {
-        "index.js": sdkMainScript,
-        "webextension/manifest.json": {
-          name: "embedded webextension name",
-          manifest_version: 2,
-          version: "0.1.0",
-          background: {
-            scripts: ["bg.js"],
-          },
-        },
-        "webextension/bg.js": backgroundScript,
-      },
-    }),
-  }, id);
-
-  extension.startup();
-
-  yield extension.awaitFinish("sdk.webext-api.onmessage");
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_idle.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_idle.html
deleted file mode 100644
index 3c3063e67..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_idle.html
+++ /dev/null
@@ -1,64 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-const idleService = Cc["@mozilla.org/widget/idleservice;1"].getService(Ci.nsIIdleService);
-
-add_task(function* testWithRealIdleService() {
-  function background() {
-    browser.test.onMessage.addListener((msg, ...args) => {
-      let detectionInterval = args[0];
-      if (msg == "addListener") {
-        browser.idle.queryState(detectionInterval).then(status => {
-          browser.test.assertEq("active", status, "Idle status is active");
-        });
-        browser.idle.setDetectionInterval(detectionInterval);
-        browser.idle.onStateChanged.addListener(newState => {
-          browser.test.assertEq("idle", newState, "listener fired with the expected state");
-          browser.test.sendMessage("listenerFired");
-        });
-      } else if (msg == "checkState") {
-        browser.idle.queryState(detectionInterval).then(status => {
-          browser.test.assertEq("idle", status, "Idle status is idle");
-          browser.test.notifyPass("idle");
-        });
-      }
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  yield extension.startup();
-  let idleTime = idleService.idleTime;
-  let detectionInterval = Math.max(Math.ceil(idleTime / 1000) + 2, 15);
-  info(`idleTime: ${idleTime}, detectionInterval: ${detectionInterval}`);
-  extension.sendMessage("addListener", detectionInterval);
-  info("Listener added");
-  yield extension.awaitMessage("listenerFired");
-  info("Listener fired");
-  extension.sendMessage("checkState", detectionInterval);
-  yield extension.awaitFinish("idle");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_shutdown_cleanup.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_shutdown_cleanup.html
deleted file mode 100644
index e3098e6b1..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_shutdown_cleanup.html
+++ /dev/null
@@ -1,50 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
-
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://testing-common/TestUtils.jsm");
-
-const {GlobalManager} = Cu.import("resource://gre/modules/Extension.jsm");
-
-/* eslint-disable mozilla/balanced-listeners */
-
-add_task(function* testShutdownCleanup() {
-  is(GlobalManager.initialized, false,
-     "GlobalManager start as not initialized");
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: function() {
-      browser.test.notifyPass("background page loaded");
-    },
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("background page loaded");
-
-  is(GlobalManager.initialized, true,
-     "GlobalManager has been initialized once an extension is started");
-
-  yield extension.unload();
-
-  is(GlobalManager.initialized, false,
-     "GlobalManager has been uninitialized once all the webextensions have been stopped");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_storage_cleanup.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_storage_cleanup.html
deleted file mode 100644
index 010769500..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_storage_cleanup.html
+++ /dev/null
@@ -1,164 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-// Test that storage used by a webextension (through localStorage,
-// indexedDB, and browser.storage.local) gets cleaned up when the
-// extension is uninstalled.
-add_task(function* test_uninstall() {
-  function writeData() {
-    localStorage.setItem("hello", "world");
-
-    let idbPromise = new Promise((resolve, reject) => {
-      let req = indexedDB.open("test");
-      req.onerror = e => {
-        reject(new Error(`indexedDB open failed with ${e.errorCode}`));
-      };
-
-      req.onupgradeneeded = e => {
-        let db = e.target.result;
-        db.createObjectStore("store", {keyPath: "name"});
-      };
-
-      req.onsuccess = e => {
-        let db = e.target.result;
-        let transaction = db.transaction("store", "readwrite");
-        let addreq = transaction.objectStore("store")
-                                .add({name: "hello", value: "world"});
-        addreq.onerror = addreqError => {
-          reject(new Error(`add to indexedDB failed with ${addreqError.errorCode}`));
-        };
-        addreq.onsuccess = () => {
-          resolve();
-        };
-      };
-    });
-
-    let browserStoragePromise = browser.storage.local.set({hello: "world"});
-
-    Promise.all([idbPromise, browserStoragePromise]).then(() => {
-      browser.test.sendMessage("finished");
-    });
-  }
-
-  function readData() {
-    let matchLocalStorage = (localStorage.getItem("hello") == "world");
-
-    let idbPromise = new Promise((resolve, reject) => {
-      let req = indexedDB.open("test");
-      req.onerror = e => {
-        reject(new Error(`indexedDB open failed with ${e.errorCode}`));
-      };
-
-      req.onupgradeneeded = e => {
-        // no database, data is not present
-        resolve(false);
-      };
-
-      req.onsuccess = e => {
-        let db = e.target.result;
-        let transaction = db.transaction("store", "readwrite");
-        let addreq = transaction.objectStore("store").get("hello");
-        addreq.onerror = addreqError => {
-          reject(new Error(`read from indexedDB failed with ${addreqError.errorCode}`));
-        };
-        addreq.onsuccess = () => {
-          let match = (addreq.result.value == "world");
-          resolve(match);
-        };
-      };
-    });
-
-    let browserStoragePromise = browser.storage.local.get("hello").then(result => {
-      return (Object.keys(result).length == 1 && result.hello == "world");
-    });
-
-    Promise.all([idbPromise, browserStoragePromise])
-           .then(([matchIDB, matchBrowserStorage]) => {
-             let result = {matchLocalStorage, matchIDB, matchBrowserStorage};
-             browser.test.sendMessage("results", result);
-           });
-  }
-
-  const ID = "storage.cleanup@tests.mozilla.org";
-
-  // Use a test-only pref to leave the addonid->uuid mapping around after
-  // uninstall so that we can re-attach to the same storage.  Also set
-  // the pref to prevent cleaning up storage on uninstall so we can test
-  // that the "keep uuid" logic works correctly.  Do the storage flag in
-  // a separate prefEnv so we can pop it below, leaving the uuid flag set.
-  yield SpecialPowers.pushPrefEnv({
-    set: [["extensions.webextensions.keepUuidOnUninstall", true]],
-  });
-  yield SpecialPowers.pushPrefEnv({
-    set: [["extensions.webextensions.keepStorageOnUninstall", true]],
-  });
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: writeData,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["storage"],
-    },
-    useAddonManager: "temporary",
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("finished");
-  yield extension.unload();
-
-  // Check that we can still see data we wrote to storage but clear the
-  // "leave storage" flag so our storaged gets cleared on uninstall.
-  // This effectively tests the keepUuidOnUninstall logic, which ensures
-  // that when we read storage again and check that it is cleared, that
-  // it is actually a meaningful test!
-  yield SpecialPowers.popPrefEnv();
-  extension = ExtensionTestUtils.loadExtension({
-    background: readData,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["storage"],
-    },
-    useAddonManager: "temporary",
-  });
-
-  yield extension.startup();
-  let results = yield extension.awaitMessage("results");
-  is(results.matchLocalStorage, true, "localStorage data is still present");
-  is(results.matchIDB, true, "indexedDB data is still present");
-  is(results.matchBrowserStorage, true, "browser.storage.local data is still present");
-
-  yield extension.unload();
-
-  // Read again.  This time, our data should be gone.
-  extension = ExtensionTestUtils.loadExtension({
-    background: readData,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["storage"],
-    },
-    useAddonManager: "temporary",
-  });
-
-  yield extension.startup();
-  results = yield extension.awaitMessage("results");
-  is(results.matchLocalStorage, false, "localStorage data was cleared");
-  is(results.matchIDB, false, "indexedDB data was cleared");
-  is(results.matchBrowserStorage, false, "browser.storage.local data was cleared");
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_trustworthy_origin.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_trustworthy_origin.html
deleted file mode 100644
index 573c08806..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_trustworthy_origin.html
+++ /dev/null
@@ -1,53 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/**
- * This test is asserting that moz-extension: URLs are recognized as trustworthy local origins
- */
-
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-
-XPCOMUtils.defineLazyServiceGetter(this, "gContentSecurityManager",
-                                   "@mozilla.org/contentsecuritymanager;1",
-                                   "nsIContentSecurityManager");
-
-add_task(function* () {
-  function background() {
-    browser.test.sendMessage("ready", browser.runtime.getURL("/test.html"));
-  }
-
-  let extensionData = {
-    background,
-    files: {
-      "test.html": `<html><head></head><body></body></html>`,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let url = yield extension.awaitMessage("ready");
-
-  let uri = NetUtil.newURI(url);
-  let principal = Services.scriptSecurityManager.getCodebasePrincipal(uri);
-  is(gContentSecurityManager.isOriginPotentiallyTrustworthy(principal), true);
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_webnavigation_resolved_urls.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_webnavigation_resolved_urls.html
deleted file mode 100644
index 768eb31fd..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_webnavigation_resolved_urls.html
+++ /dev/null
@@ -1,83 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* webnav_unresolved_uri_on_expected_URI_scheme() {
-  function background() {
-    let checkURLs;
-
-    browser.webNavigation.onCompleted.addListener(async msg => {
-      if (checkURLs.length > 0) {
-        let expectedURL = checkURLs.shift();
-        browser.test.assertEq(expectedURL, msg.url, "Got the expected URL");
-        await browser.tabs.remove(msg.tabId);
-        browser.test.sendMessage("next");
-      }
-    });
-
-    browser.test.onMessage.addListener((name, urls) => {
-      if (name == "checkURLs") {
-        checkURLs = urls;
-      }
-    });
-
-    browser.test.sendMessage("ready", browser.runtime.getURL("/tab.html"));
-  }
-
-  let extensionData = {
-    manifest: {
-      permissions: [
-        "webNavigation",
-      ],
-    },
-    background,
-    files: {
-      "tab.html": `<!DOCTYPE html>
-        <html>
-          <head>
-           <meta charset="utf-8">
-          </head>
-        </html>
-      `,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  let checkURLs = [
-    "resource://gre/modules/Services.jsm",
-    "chrome://mochikit/content/tests/SimpleTest/SimpleTest.js",
-    "about:mozilla",
-  ];
-
-  let tabURL = yield extension.awaitMessage("ready");
-  checkURLs.push(tabURL);
-
-  extension.sendMessage("checkURLs", checkURLs);
-
-  for (let url of checkURLs) {
-    window.open(url);
-    yield extension.awaitMessage("next");
-  }
-
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_webrequest_background_events.html b/toolkit/components/webextensions/test/mochitest/test_chrome_ext_webrequest_background_events.html
deleted file mode 100644
index a13c4d475..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_ext_webrequest_background_events.html
+++ /dev/null
@@ -1,96 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-Cu.import(SimpleTest.getTestFileURL("webrequest_test.jsm"));
-let {testFetch, testXHR} = webrequest_test;
-
-// Here we test that any requests originating from a system principal are not
-// accessible through WebRequest.  text_ext_webrequest_background_events tests
-// non-system principal requests.
-
-let testExtension = {
-  manifest: {
-    permissions: [
-      "webRequest",
-      "<all_urls>",
-    ],
-  },
-  background() {
-    let eventNames = [
-      "onBeforeRequest",
-      "onBeforeSendHeaders",
-      "onSendHeaders",
-      "onHeadersReceived",
-      "onResponseStarted",
-      "onCompleted",
-    ];
-
-    function listener(name, details) {
-      // If we get anything, we failed.  Removing the system principal check
-      // in ext-webrequest triggers this failure.
-      browser.test.fail(`recieved ${name}`);
-    }
-
-    for (let name of eventNames) {
-      browser.webRequest[name].addListener(
-        listener.bind(null, name),
-        {urls: ["https://example.com/*"]}
-      );
-    }
-  },
-};
-
-add_task(function* test_webRequest_chromeworker_events() {
-  let extension = ExtensionTestUtils.loadExtension(testExtension);
-  yield extension.startup();
-  yield new Promise(resolve => {
-    let worker = new ChromeWorker("webrequest_chromeworker.js");
-    worker.onmessage = event => {
-      ok("chrome worker fetch finished");
-      resolve();
-    };
-    worker.postMessage("go");
-  });
-  yield extension.unload();
-});
-
-add_task(function* test_webRequest_chromepage_events() {
-  let extension = ExtensionTestUtils.loadExtension(testExtension);
-  yield extension.startup();
-  yield new Promise(resolve => {
-    fetch("https://example.com/example.txt").then(() => {
-      ok("test page loaded");
-      resolve();
-    });
-  });
-  yield extension.unload();
-});
-
-add_task(function* test_webRequest_jsm_events() {
-  let extension = ExtensionTestUtils.loadExtension(testExtension);
-  yield extension.startup();
-  yield testFetch("https://example.com/example.txt").then(() => {
-    ok("fetch page loaded");
-  });
-  yield testXHR("https://example.com/example.txt").then(() => {
-    ok("xhr page loaded");
-  });
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_chrome_native_messaging_paths.html b/toolkit/components/webextensions/test/mochitest/test_chrome_native_messaging_paths.html
deleted file mode 100644
index 29a148063..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_chrome_native_messaging_paths.html
+++ /dev/null
@@ -1,61 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" href="chrome://mochikit/contents/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/* global OS */
-
-Cu.import("resource://gre/modules/osfile.jsm");
-Cu.import("resource://gre/modules/AppConstants.jsm");
-
-// Test that the default paths searched for native host manifests
-// are the ones we expect.
-add_task(function* test_default_paths() {
-  let expectUser, expectGlobal;
-  switch (AppConstants.platform) {
-    case "macosx": {
-      expectUser = OS.Path.join(OS.Constants.Path.homeDir,
-                                "Library/Application Support/Mozilla/NativeMessagingHosts");
-      expectGlobal = "/Library/Application Support/Mozilla/NativeMessagingHosts";
-
-      break;
-    }
-
-    case "linux": {
-      expectUser = OS.Path.join(OS.Constants.Path.homeDir, ".mozilla/native-messaging-hosts");
-
-      const libdir = AppConstants.HAVE_USR_LIB64_DIR ? "lib64" : "lib";
-      expectGlobal = OS.Path.join("/usr", libdir, "mozilla/native-messaging-hosts");
-      break;
-    }
-
-    default:
-      // Fixed filesystem paths are only defined for MacOS and Linux,
-      // there's nothing to test on other platforms.
-      ok(false, `This test does not apply on ${AppConstants.platform}`);
-      break;
-  }
-
-  let userDir = Services.dirsvc.get("XREUserNativeMessaging", Ci.nsIFile).path;
-  is(userDir, expectUser, "user-specific native messaging directory is correct");
-
-  let globalDir = Services.dirsvc.get("XRESysNativeMessaging", Ci.nsIFile).path;
-  is(globalDir, expectGlobal, "system-wide native messaing directory is correct");
-});
-
-</script>
-
-</body>
-</html>
-
diff --git a/toolkit/components/webextensions/test/mochitest/test_clipboard.html b/toolkit/components/webextensions/test/mochitest/test_clipboard.html
deleted file mode 100644
index 900ee5f10..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_clipboard.html
+++ /dev/null
@@ -1,140 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>clipboard permission test</title>
-  <script src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script src="head.js"></script>
-  <link rel="stylesheet" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-function doCopy(txt) {
-  let field = document.createElement("textarea");
-  document.body.appendChild(field);
-  field.value = txt;
-  field.select();
-  return document.execCommand("copy");
-}
-
-add_task(function* no_permission_deny_copy() {
-  function backgroundScript() {
-    browser.test.assertEq(false, doCopy("whatever"),
-      "copy should be denied without permission");
-    browser.test.sendMessage("ready");
-  }
-  let extensionData = {
-    background: `${doCopy};(${backgroundScript})();`,
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitMessage("ready");
-
-  yield extension.unload();
-});
-
-/** Selecting text in a bg page is not possible, skip test until it's fixed.
-add_task(function* with_permission_allow_copy() {
-  function backgroundScript() {
-    browser.test.onMessage.addListener(txt => {
-      browser.test.assertEq(true, doCopy(txt),
-        "copy should be allowed with permission");
-    });
-    browser.test.sendMessage("ready");
-  }
-  let extensionData = {
-    background: `${doCopy};(${backgroundScript})();`,
-    manifest: {
-      permissions: [
-        "clipboardWrite",
-      ],
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  const DUMMY_STR = "dummy string to copy";
-  yield new Promise(resolve => {
-    SimpleTest.waitForClipboard(DUMMY_STR, () => {
-      extension.sendMessage(DUMMY_STR);
-    }, resolve, resolve);
-  });
-
-  yield extension.unload();
-}); */
-
-add_task(function* content_script_no_permission_deny_copy() {
-  function contentScript() {
-    browser.test.assertEq(false, doCopy("whatever"),
-      "copy should be denied without permission");
-    browser.test.sendMessage("ready");
-  }
-  let extensionData = {
-    manifest: {
-      content_scripts: [{
-        js: ["contentscript.js"],
-        matches: ["http://mochi.test/*/file_sample.html"],
-      }],
-    },
-    files: {
-      "contentscript.js": `${doCopy};(${contentScript})();`,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitMessage("ready");
-  win.close();
-
-  yield extension.unload();
-});
-
-add_task(function* content_script_with_permission_allow_copy() {
-  function contentScript() {
-    browser.test.onMessage.addListener(txt => {
-      browser.test.assertEq(true, doCopy(txt),
-        "copy should be allowed with permission");
-    });
-    browser.test.sendMessage("ready");
-  }
-  let extensionData = {
-    manifest: {
-      content_scripts: [{
-        js: ["contentscript.js"],
-        matches: ["http://mochi.test/*/file_sample.html"],
-      }],
-      permissions: [
-        "clipboardWrite",
-      ],
-    },
-    files: {
-      "contentscript.js": `${doCopy};(${contentScript})();`,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitMessage("ready");
-
-  const DUMMY_STR = "dummy string to copy in content script";
-  yield new Promise(resolve => {
-    SimpleTest.waitForClipboard(DUMMY_STR, () => {
-      extension.sendMessage(DUMMY_STR);
-    }, resolve, resolve);
-  });
-
-  win.close();
-
-  yield extension.unload();
-});
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js b/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js
deleted file mode 100644
index 25d04b36b..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js
+++ /dev/null
@@ -1,160 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-// Tests whether not too many APIs are visible by default.
-// This file is used by test_ext_all_apis.html in browser/ and mobile/android/,
-// which may modify the following variables to add or remove expected APIs.
-/* globals expectedContentApisTargetSpecific */
-/* globals expectedBackgroundApisTargetSpecific */
-
-// Generates a list of expectations.
-function generateExpectations(list) {
-  return list.reduce((allApis, path) => {
-    return allApis.concat(`browser.${path}`, `chrome.${path}`);
-  }, []).sort();
-}
-
-let expectedCommonApis = [
-  "extension.getURL",
-  "extension.inIncognitoContext",
-  "extension.lastError",
-  "i18n.detectLanguage",
-  "i18n.getAcceptLanguages",
-  "i18n.getMessage",
-  "i18n.getUILanguage",
-  "runtime.OnInstalledReason",
-  "runtime.OnRestartRequiredReason",
-  "runtime.PlatformArch",
-  "runtime.PlatformOs",
-  "runtime.RequestUpdateCheckStatus",
-  "runtime.getManifest",
-  "runtime.connect",
-  "runtime.getURL",
-  "runtime.id",
-  "runtime.lastError",
-  "runtime.onConnect",
-  "runtime.onMessage",
-  "runtime.sendMessage",
-  // If you want to add a new powerful test API, please see bug 1287233.
-  "test.assertEq",
-  "test.assertFalse",
-  "test.assertRejects",
-  "test.assertThrows",
-  "test.assertTrue",
-  "test.fail",
-  "test.log",
-  "test.notifyFail",
-  "test.notifyPass",
-  "test.onMessage",
-  "test.sendMessage",
-  "test.succeed",
-];
-
-let expectedContentApis = [
-  ...expectedCommonApis,
-  ...expectedContentApisTargetSpecific,
-];
-
-let expectedBackgroundApis = [
-  ...expectedCommonApis,
-  ...expectedBackgroundApisTargetSpecific,
-  "extension.ViewType",
-  "extension.getBackgroundPage",
-  "extension.getViews",
-  "extension.isAllowedFileSchemeAccess",
-  "extension.isAllowedIncognitoAccess",
-  // Note: extensionTypes is not visible in Chrome.
-  "extensionTypes.ImageFormat",
-  "extensionTypes.RunAt",
-  "management.ExtensionDisabledReason",
-  "management.ExtensionInstallType",
-  "management.ExtensionType",
-  "management.getSelf",
-  "management.uninstallSelf",
-  "runtime.getBackgroundPage",
-  "runtime.getBrowserInfo",
-  "runtime.getPlatformInfo",
-  "runtime.onConnectExternal",
-  "runtime.onInstalled",
-  "runtime.onMessageExternal",
-  "runtime.onStartup",
-  "runtime.onUpdateAvailable",
-  "runtime.openOptionsPage",
-  "runtime.reload",
-  "runtime.setUninstallURL",
-];
-
-function sendAllApis() {
-  function isEvent(key, val) {
-    if (!/^on[A-Z]/.test(key)) {
-      return false;
-    }
-    let eventKeys = [];
-    for (let prop in val) {
-      eventKeys.push(prop);
-    }
-    eventKeys = eventKeys.sort().join();
-    return eventKeys === "addListener,hasListener,removeListener";
-  }
-  function mayRecurse(key, val) {
-    if (Object.keys(val).filter(k => !/^[A-Z\-0-9_]+$/.test(k)).length === 0) {
-      // Don't recurse on constants and empty objects.
-      return false;
-    }
-    return !isEvent(key, val);
-  }
-
-  let results = [];
-  function diveDeeper(path, obj) {
-    for (let key in obj) {
-      let val = obj[key];
-      if (typeof val == "object" && val !== null && mayRecurse(key, val)) {
-        diveDeeper(`${path}.${key}`, val);
-      } else if (val !== undefined) {
-        results.push(`${path}.${key}`);
-      }
-    }
-  }
-  diveDeeper("browser", browser);
-  diveDeeper("chrome", chrome);
-  browser.test.sendMessage("allApis", results.sort());
-}
-
-add_task(function* test_enumerate_content_script_apis() {
-  let extensionData = {
-    manifest: {
-      content_scripts: [{
-        matches: ["http://mochi.test/*/file_sample.html"],
-        js: ["contentscript.js"],
-        run_at: "document_start",
-      }],
-    },
-    files: {
-      "contentscript.js": sendAllApis,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  let actualApis = yield extension.awaitMessage("allApis");
-  win.close();
-  let expectedApis = generateExpectations(expectedContentApis);
-  isDeeply(actualApis, expectedApis, "content script APIs");
-
-  yield extension.unload();
-});
-
-add_task(function* test_enumerate_background_script_apis() {
-  let extensionData = {
-    background: sendAllApis,
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  let actualApis = yield extension.awaitMessage("allApis");
-  let expectedApis = generateExpectations(expectedBackgroundApis);
-  isDeeply(actualApis, expectedApis, "background script APIs");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_background_api_injection.html b/toolkit/components/webextensions/test/mochitest/test_ext_background_api_injection.html
deleted file mode 100644
index f43a59f81..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_background_api_injection.html
+++ /dev/null
@@ -1,46 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for privilege escalation into content pages</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* testBackgroundWindow() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background: function() {
-      const BASE = "http://mochi.test:8888/tests/toolkit/components/extensions/test/mochitest";
-
-      browser.test.log("background script executed");
-      window.location = `${BASE}/file_privilege_escalation.html`;
-    },
-  });
-
-  let awaitConsole = new Promise(resolve => {
-    let chromeScript = SpecialPowers.loadChromeScript(
-      SimpleTest.getTestFileURL("file_ext_test_api_injection.js"));
-
-    chromeScript.addMessageListener("console-message", resolve);
-  });
-
-  yield extension.startup();
-
-  let message = yield awaitConsole;
-
-  ok(message.message.includes("WebExt Privilege Escalation: typeof(browser) = undefined"),
-     "Document does not have `browser` APIs.");
-
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_background_canvas.html b/toolkit/components/webextensions/test/mochitest/test_ext_background_canvas.html
deleted file mode 100644
index bff7190cb..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_background_canvas.html
+++ /dev/null
@@ -1,47 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for background page canvas rendering</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_background_canvas() {
-  function background() {
-    try {
-      let canvas = document.createElement("canvas");
-
-      let context = canvas.getContext("2d");
-
-      // This ensures that we have a working PresShell, and can successfully
-      // calculate font metrics.
-      context.font = "8pt fixed";
-
-      browser.test.notifyPass("background-canvas");
-    } catch (e) {
-      browser.test.fail(`Error: ${e} :: ${e.stack}`);
-      browser.test.notifyFail("background-canvas");
-    }
-  }
-
-  let extensionData = {
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-  yield extension.awaitFinish("background-canvas");
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_background_generated_url.html b/toolkit/components/webextensions/test/mochitest/test_ext_background_generated_url.html
deleted file mode 100644
index f4fcf3d34..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_background_generated_url.html
+++ /dev/null
@@ -1,47 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test _generated_background_page.html</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-add_task(function* test_url_of_generated_background_page() {
-  function backgroundScript() {
-    const EXPECTED_URL = browser.runtime.getURL("/_generated_background_page.html");
-    browser.test.assertEq(EXPECTED_URL, location.href);
-    browser.test.sendMessage("script done", EXPECTED_URL);
-  }
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      background: {
-        scripts: ["bg.js"],
-      },
-      web_accessible_resources: ["_generated_background_page.html"],
-    },
-    files: {
-      "bg.js": backgroundScript,
-    },
-  });
-
-  yield extension.startup();
-  const EXPECTED_URL = yield extension.awaitMessage("script done");
-
-  let win = window.open(EXPECTED_URL);
-  ok(win, "Should open new tab at URL: " + EXPECTED_URL);
-  yield extension.awaitMessage("script done");
-  win.close();
-
-  yield extension.unload();
-});
-
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_background_teardown.html b/toolkit/components/webextensions/test/mochitest/test_ext_background_teardown.html
deleted file mode 100644
index bb6b2e970..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_background_teardown.html
+++ /dev/null
@@ -1,76 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for background script teardown</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-add_task(function* test_background_reload_and_unload() {
-  function background() {
-    browser.test.onMessage.addListener(msg => {
-      browser.test.assertEq("reload-background", msg);
-      location.reload();
-    });
-    browser.test.sendMessage("background-url", location.href);
-  }
-
-  let chromeScript = SpecialPowers.loadChromeScript(
-      SimpleTest.getTestFileURL("file_teardown_test.js"));
-  yield chromeScript.promiseOneMessage("chromescript-startup");
-
-  let extensionData = {
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  function* getContextEvents() {
-    chromeScript.sendAsyncMessage("get-context-events");
-    let contextEvents = yield chromeScript.promiseOneMessage("context-events");
-    return contextEvents.filter(event => event.extensionId == extension.id);
-  }
-  yield extension.startup();
-  let backgroundUrl = yield extension.awaitMessage("background-url");
-
-  let contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 1,
-      "ExtensionContext state change after loading an extension");
-  is(contextEvents[0].eventType, "load");
-  is(contextEvents[0].url, backgroundUrl,
-      "The ExtensionContext should be the background page");
-
-  extension.sendMessage("reload-background");
-  yield extension.awaitMessage("background-url");
-
-  contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 2,
-      "ExtensionContext state changes after reloading the background page");
-  is(contextEvents[0].eventType, "unload",
-      "Unload ExtensionContext of background page");
-  is(contextEvents[0].url, backgroundUrl, "ExtensionContext URL = background");
-  is(contextEvents[1].eventType, "load",
-      "Create new ExtensionContext for background page");
-  is(contextEvents[1].url, backgroundUrl, "ExtensionContext URL = background");
-  yield extension.unload();
-
-  contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 1,
-      "ExtensionContext state change after unloading the extension");
-  is(contextEvents[0].eventType, "unload",
-      "Unload ExtensionContext for background page after extension unloads");
-  is(contextEvents[0].url, backgroundUrl, "ExtensionContext URL = background");
-
-  chromeScript.sendAsyncMessage("cleanup");
-  chromeScript.destroy();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_content_security_policy.html b/toolkit/components/webextensions/test/mochitest/test_ext_content_security_policy.html
deleted file mode 100644
index a36f29563..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_content_security_policy.html
+++ /dev/null
@@ -1,162 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension CSP test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/**
- * Tests that content security policies for an add-on are actually applied to *
- * documents that belong to it. This tests both the base policies and add-on
- * specific policies, and ensures that the parsed policies applied to the
- * document's principal match what was specified in the policy string.
- *
- * @param {object} [customCSP]
- */
-function* testPolicy(customCSP = null) {
-  let baseURL;
-
-  let baseCSP = {
-    "object-src": ["blob:", "filesystem:", "https://*", "moz-extension:", "'self'"],
-    "script-src": ["'unsafe-eval'", "'unsafe-inline'", "blob:", "filesystem:", "https://*", "moz-extension:", "'self'"],
-  };
-
-  let addonCSP = {
-    "object-src": ["'self'"],
-    "script-src": ["'self'"],
-  };
-
-  let content_security_policy = null;
-
-  if (customCSP) {
-    for (let key of Object.keys(customCSP)) {
-      addonCSP[key] = customCSP[key].split(/\s+/);
-    }
-
-    content_security_policy = Object.keys(customCSP)
-      .map(key => `${key} ${customCSP[key]}`)
-      .join("; ");
-  }
-
-
-  function filterSelf(sources) {
-    return sources.map(src => src == "'self'" ? baseURL : src);
-  }
-
-  function checkSource(name, policy, expected) {
-    is(JSON.stringify(policy[name].sort()),
-       JSON.stringify(filterSelf(expected[name]).sort()),
-       `Expected value for ${name}`);
-  }
-
-  function checkCSP(csp, location) {
-    let policies = csp["csp-policies"];
-
-    info(`Base policy for ${location}`);
-
-    is(policies[0]["report-only"], false, "Policy is not report-only");
-    checkSource("object-src", policies[0], baseCSP);
-    checkSource("script-src", policies[0], baseCSP);
-
-    info(`Add-on policy for ${location}`);
-
-    is(policies[1]["report-only"], false, "Policy is not report-only");
-    checkSource("object-src", policies[1], addonCSP);
-    checkSource("script-src", policies[1], addonCSP);
-  }
-
-
-  function getCSP(window) {
-    let {cspJSON} = SpecialPowers.Cu.getObjectPrincipal(window);
-    return JSON.parse(cspJSON);
-  }
-
-  function background(getCSPFn) {
-    browser.test.sendMessage("base-url", browser.extension.getURL("").replace(/\/$/, ""));
-
-    browser.test.sendMessage("background-csp", getCSPFn(window));
-  }
-
-  function tabScript(getCSPFn) {
-    browser.test.sendMessage("tab-csp", getCSPFn(window));
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${background})(${getCSP})`,
-
-    files: {
-      "tab.html": `<html><head><meta charset="utf-8">
-                   <script src="tab.js"></${"script"}></head></html>`,
-
-      "tab.js": `(${tabScript})(${getCSP})`,
-
-      "content.html": `<html><head><meta charset="utf-8"></head></html>`,
-    },
-
-    manifest: {
-      content_security_policy,
-
-      web_accessible_resources: ["content.html", "tab.html"],
-    },
-  });
-
-
-  info(`Testing CSP for policy: ${content_security_policy}`);
-
-  yield extension.startup();
-
-  baseURL = yield extension.awaitMessage("base-url");
-
-
-  let win1 = window.open(`${baseURL}/tab.html`);
-
-  let frame = document.createElement("iframe");
-  frame.src = `${baseURL}/content.html`;
-  document.body.appendChild(frame);
-
-  yield new Promise(resolve => {
-    frame.onload = resolve;
-  });
-
-
-  let backgroundCSP = yield extension.awaitMessage("background-csp");
-  checkCSP(backgroundCSP, "background page");
-
-  let tabCSP = yield extension.awaitMessage("tab-csp");
-  checkCSP(tabCSP, "tab page");
-
-  let contentCSP = getCSP(frame.contentWindow);
-  checkCSP(contentCSP, "content frame");
-
-
-  win1.close();
-  frame.remove();
-
-  yield extension.unload();
-}
-
-add_task(function* testCSP() {
-  yield testPolicy(null);
-
-  let hash = "'sha256-NjZhMDQ1YjQ1MjEwMmM1OWQ4NDBlYzA5N2Q1OWQ5NDY3ZTEzYTNmMzRmNjQ5NGU1MzlmZmQzMmMxYmIzNWYxOCAgLQo='";
-
-  yield testPolicy({
-    "object-src": "'self' https://*.example.com",
-    "script-src": `'self' https://*.example.com 'unsafe-eval' ${hash}`,
-  });
-
-  yield testPolicy({
-    "object-src": "'none'",
-    "script-src": `'self'`,
-  });
-});
-</script>
-</body>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript.html
deleted file mode 100644
index 39f1bfabd..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript.html
+++ /dev/null
@@ -1,116 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript() {
-  function background() {
-    browser.runtime.onMessage.addListener(([msg, expectedStates, readyState], sender) => {
-      if (msg == "chrome-namespace-ok") {
-        browser.test.sendMessage(msg);
-        return;
-      }
-
-      browser.test.assertEq("script-run", msg, "message type is correct");
-      browser.test.assertTrue(expectedStates.includes(readyState),
-                              `readyState "${readyState}" is one of [${expectedStates}]`);
-      browser.test.sendMessage("script-run-" + expectedStates[0]);
-    });
-  }
-
-  function contentScriptStart() {
-    browser.runtime.sendMessage(["script-run", ["loading"], document.readyState]);
-  }
-  function contentScriptEnd() {
-    browser.runtime.sendMessage(["script-run", ["interactive", "complete"], document.readyState]);
-  }
-  function contentScriptIdle() {
-    browser.runtime.sendMessage(["script-run", ["complete"], document.readyState]);
-  }
-
-  function contentScript() {
-    let manifest = browser.runtime.getManifest();
-    void manifest.applications.gecko.id;
-    chrome.runtime.sendMessage(["chrome-namespace-ok"]);
-  }
-
-  let extensionData = {
-    manifest: {
-      applications: {gecko: {id: "contentscript@tests.mozilla.org"}},
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script_start.js"],
-          "run_at": "document_start",
-        },
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script_end.js"],
-          "run_at": "document_end",
-        },
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script_idle.js"],
-          "run_at": "document_idle",
-        },
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-          "run_at": "document_idle",
-        },
-      ],
-    },
-    background,
-
-    files: {
-      "content_script_start.js": contentScriptStart,
-      "content_script_end.js": contentScriptEnd,
-      "content_script_idle.js": contentScriptIdle,
-      "content_script.js": contentScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  let loadingCount = 0;
-  let interactiveCount = 0;
-  let completeCount = 0;
-  extension.onMessage("script-run-loading", () => { loadingCount++; });
-  extension.onMessage("script-run-interactive", () => { interactiveCount++; });
-
-  let completePromise = new Promise(resolve => {
-    extension.onMessage("script-run-complete", () => { completeCount++; resolve(); });
-  });
-
-  let chromeNamespacePromise = extension.awaitMessage("chrome-namespace-ok");
-
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), completePromise, chromeNamespacePromise]);
-  info("test page loaded");
-
-  win.close();
-
-  is(loadingCount, 1, "document_start script ran exactly once");
-  is(interactiveCount, 1, "document_end script ran exactly once");
-  is(completeCount, 1, "document_idle script ran exactly once");
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_about_blank.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_about_blank.html
deleted file mode 100644
index 3766678e7..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_about_blank.html
+++ /dev/null
@@ -1,117 +0,0 @@
-<!doctype html>
-<html>
-<head>
-  <title>Test content script match_about_blank option</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript_about_blank() {
-  const manifest = {
-    content_scripts: [
-      {
-        match_about_blank: true,
-        matches: ["http://mochi.test/*/file_with_about_blank.html", "http://example.com/*"],
-        all_frames: true,
-        css: ["all.css"],
-        js: ["all.js"],
-      }, {
-        matches: ["http://mochi.test/*/file_with_about_blank.html"],
-        css: ["mochi_without.css"],
-        js: ["mochi_without.js"],
-        all_frames: true,
-      }, {
-        match_about_blank: true,
-        matches: ["http://mochi.test/*/file_with_about_blank.html"],
-        css: ["mochi_with.css"],
-        js: ["mochi_with.js"],
-        all_frames: true,
-      },
-    ],
-  };
-
-  const files = {
-    "all.js": function() {
-      browser.runtime.sendMessage("all");
-    },
-    "all.css": `
-      body { color: red; }
-    `,
-    "mochi_without.js": function() {
-      browser.runtime.sendMessage("mochi_without");
-    },
-    "mochi_without.css": `
-      body { background: yellow; }
-    `,
-    "mochi_with.js": function() {
-      browser.runtime.sendMessage("mochi_with");
-    },
-    "mochi_with.css": `
-      body { text-align: right; }
-    `,
-  };
-
-  function background() {
-    browser.runtime.onMessage.addListener((script, {url}) => {
-      const kind = url.startsWith("about:") ? url : "top";
-      browser.test.sendMessage("script", [script, kind, url]);
-      browser.test.sendMessage(`${script}:${kind}`);
-    });
-  }
-
-  const PATH = "tests/toolkit/components/extensions/test/mochitest/file_with_about_blank.html";
-  const extension = ExtensionTestUtils.loadExtension({manifest, files, background});
-  yield extension.startup();
-
-  let count = 0;
-  extension.onMessage("script", script => {
-    info(`script ran: ${script}`);
-    count++;
-  });
-
-  let win = window.open("http://example.com/" + PATH);
-  yield Promise.all([
-    extension.awaitMessage("all:top"),
-    extension.awaitMessage("all:about:blank"),
-    extension.awaitMessage("all:about:srcdoc"),
-  ]);
-  is(count, 3, "exactly 3 scripts ran");
-  win.close();
-
-  win = window.open("http://mochi.test:8888/" + PATH);
-  yield Promise.all([
-    extension.awaitMessage("all:top"),
-    extension.awaitMessage("all:about:blank"),
-    extension.awaitMessage("all:about:srcdoc"),
-    extension.awaitMessage("mochi_without:top"),
-    extension.awaitMessage("mochi_with:top"),
-    extension.awaitMessage("mochi_with:about:blank"),
-    extension.awaitMessage("mochi_with:about:srcdoc"),
-  ]);
-
-  let style = win.getComputedStyle(win.document.body);
-  is(style.color, "rgb(255, 0, 0)", "top window text color is red");
-  is(style.backgroundColor, "rgb(255, 255, 0)", "top window background is yellow");
-  is(style.textAlign, "right", "top window text is right-aligned");
-
-  let a_b = win.document.getElementById("a_b");
-  style = a_b.contentWindow.getComputedStyle(a_b.contentDocument.body);
-  is(style.color, "rgb(255, 0, 0)", "about:blank iframe text color is red");
-  is(style.backgroundColor, "transparent", "about:blank iframe background is transparent");
-  is(style.textAlign, "right", "about:blank text is right-aligned");
-
-  is(count, 10, "exactly 7 more scripts ran");
-  win.close();
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_api_injection.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_api_injection.html
deleted file mode 100644
index abf3d349f..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_api_injection.html
+++ /dev/null
@@ -1,88 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for privilege escalation into iframe with content script APIs</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<!-- WORKAROUND: this textarea hack is used to contain the html page source without escaping it -->
-<textarea id="test-asset">
-  <!DOCTYPE HTML>
-  <html>
-    <head>
-      <meta charset="utf-8">
-      <script type="text/javascript" src="./content_script_iframe.js">
-      </script>
-    </head>
-  </html>
-</textarea>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript_api_injection() {
-  function contentScript() {
-    let iframe = document.createElement("iframe");
-    iframe.setAttribute("src", browser.runtime.getURL("content_script_iframe.html"));
-    document.body.appendChild(iframe);
-  }
-
-  function contentScriptIframe() {
-    const BASE = "http://mochi.test:8888/tests/toolkit/components/extensions/test/mochitest";
-    window.location = `${BASE}/file_privilege_escalation.html`;
-  }
-
-  let extensionData = {
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-          "run_at": "document_idle",
-        },
-      ],
-      "web_accessible_resources": [
-        "content_script_iframe.html",
-      ],
-    },
-
-    files: {
-      "content_script.js": contentScript,
-      "content_script_iframe.js": contentScriptIframe,
-      "content_script_iframe.html": document.querySelector("#test-asset").textContent,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  let awaitConsole = new Promise(resolve => {
-    let chromeScript = SpecialPowers.loadChromeScript(
-      SimpleTest.getTestFileURL("file_ext_test_api_injection.js"));
-
-    chromeScript.addMessageListener("console-message", resolve);
-  });
-
-  yield extension.startup();
-  info("extension loaded");
-
-  let win = window.open("file_sample.html");
-
-  let message = yield awaitConsole;
-
-  ok(message.message.includes("WebExt Privilege Escalation: typeof(browser) = undefined"),
-     "Document does not have `browser` APIs.");
-
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_async_loading.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_async_loading.html
deleted file mode 100644
index d78f7ce02..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_async_loading.html
+++ /dev/null
@@ -1,54 +0,0 @@
-<!doctype html>
-<html>
-<head>
-  <title>Test content script async loading</title>
-  <script src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<script>
-"use strict";
-
-add_task(function* test_async_loading() {
-  const adder = `(function add(a = 1) { this.count += a; })();\n`;
-  const extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      content_scripts: [{
-        matches: ["https://example.org/"],
-        js: ["first.js", "second.js"],
-      }],
-    },
-    files: {
-      "first.js": `
-        this.count = 0;
-        ${adder.repeat(50000)};  // 2Mb
-        browser.test.assertEq(this.count, 50000, "A 50k line script");
-
-        this.order = (this.order || 0) + 1;
-        browser.test.sendMessage("first", this.order);
-      `,
-      "second.js": `
-        this.order = (this.order || 0) + 1;
-        browser.test.sendMessage("second", this.order);
-      `,
-    },
-  });
-
-  yield extension.startup();
-  const win = window.open("https://example.org/");
-
-  const [first, second] = yield Promise.all([
-    extension.awaitMessage("first"),
-    extension.awaitMessage("second"),
-  ]);
-
-  is(first, 1, "first.js finished execution first.");
-  is(second, 2, "second.js finished execution second.");
-
-  yield extension.unload();
-  win.close();
-});
-
-</script>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_context.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_context.html
deleted file mode 100644
index 97b1645dd..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_context.html
+++ /dev/null
@@ -1,81 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script contexts</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/* eslint-disable mozilla/balanced-listeners */
-
-add_task(function* test_contentscript_context() {
-  function contentScript() {
-    browser.test.sendMessage("content-script-ready");
-
-    window.addEventListener("pagehide", () => {
-      browser.test.sendMessage("content-script-hide");
-    }, true);
-    window.addEventListener("pageshow", () => {
-      browser.test.sendMessage("content-script-show");
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      content_scripts: [{
-        "matches": ["http://example.com/"],
-        "js": ["content_script.js"],
-        "run_at": "document_start",
-      }],
-    },
-
-    files: {
-      "content_script.js": contentScript,
-    },
-  });
-
-  yield extension.startup();
-
-  let win = window.open("http://example.com/");
-  yield extension.awaitMessage("content-script-ready");
-  yield extension.awaitMessage("content-script-show");
-
-  // Get the content script context and check that it points to the correct window.
-
-  let {DocumentManager} = SpecialPowers.Cu.import("resource://gre/modules/ExtensionContent.jsm", {});
-  let context = DocumentManager.getContentScriptContext(extension, win);
-  ok(context != null, "Got content script context");
-
-  is(SpecialPowers.unwrap(context.contentWindow), win, "Context's contentWindow property is correct");
-
-  // Navigate so that the content page is hidden in the bfcache.
-
-  win.location = "http://example.org/";
-  yield extension.awaitMessage("content-script-hide");
-
-  is(context.contentWindow, null, "Context's contentWindow property is null");
-
-  // Navigate back so the content page is resurrected from the bfcache.
-
-  SpecialPowers.wrap(win).history.back();
-  yield extension.awaitMessage("content-script-show");
-
-  is(SpecialPowers.unwrap(context.contentWindow), win, "Context's contentWindow property is correct");
-
-  win.close();
-
-  yield extension.awaitMessage("content-script-hide");
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_create_iframe.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_create_iframe.html
deleted file mode 100644
index 8aac3e213..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_create_iframe.html
+++ /dev/null
@@ -1,165 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<!-- WORKAROUND: this textarea hack is used to contain the html page source without escaping it -->
-<textarea id="test-asset">
-  <!DOCTYPE HTML>
-  <html>
-    <head>
-      <meta charset="utf-8">
-      <script type="text/javascript" src="content_script_iframe.js"></script>
-    </head>
-  </html>
-</textarea>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript_create_iframe() {
-  function background() {
-    browser.runtime.onMessage.addListener((msg, sender) => {
-      let {name, availableAPIs, manifest, testGetManifest} = msg;
-      let hasExtTabsAPI = availableAPIs.indexOf("tabs") > 0;
-      let hasExtWindowsAPI = availableAPIs.indexOf("windows") > 0;
-
-      browser.test.assertFalse(hasExtTabsAPI, "the created iframe should not be able to use privileged APIs (tabs)");
-      browser.test.assertFalse(hasExtWindowsAPI, "the created iframe should not be able to use privileged APIs (windows)");
-
-      let {applications: {gecko: {id: expectedManifestGeckoId}}} = chrome.runtime.getManifest();
-      let {applications: {gecko: {id: actualManifestGeckoId}}} = manifest;
-
-      browser.test.assertEq(actualManifestGeckoId, expectedManifestGeckoId,
-                            "the add-on manifest should be accessible from the created iframe"
-      );
-
-      let {applications: {gecko: {id: testGetManifestGeckoId}}} = testGetManifest;
-
-      browser.test.assertEq(testGetManifestGeckoId, expectedManifestGeckoId,
-                              "GET_MANIFEST() returns manifest data before extension unload"
-      );
-
-      browser.test.sendMessage(name);
-    });
-  }
-
-  function contentScript() {
-    let iframe = document.createElement("iframe");
-    iframe.setAttribute("src", browser.runtime.getURL("content_script_iframe.html"));
-    document.body.appendChild(iframe);
-  }
-
-  function contentScriptIframe() {
-    window.GET_MANIFEST = browser.runtime.getManifest.bind(null);
-
-    window.testGetManifestException = () => {
-      try {
-        window.GET_MANIFEST();
-      } catch (exception) {
-        return String(exception);
-      }
-    };
-
-    let testGetManifest = window.GET_MANIFEST();
-
-    let manifest = browser.runtime.getManifest();
-    let availableAPIs = Object.keys(browser);
-
-    browser.runtime.sendMessage({
-      name: "content-script-iframe-loaded",
-      availableAPIs,
-      manifest,
-      testGetManifest,
-    });
-  }
-
-  const ID = "contentscript@tests.mozilla.org";
-  let extensionData = {
-    manifest: {
-      applications: {gecko: {id: ID}},
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-          "run_at": "document_idle",
-        },
-      ],
-      web_accessible_resources: [
-        "content_script_iframe.html",
-      ],
-    },
-
-    background,
-
-    files: {
-      "content_script.js": contentScript,
-      "content_script_iframe.html": document.querySelector("#test-asset").textContent,
-      "content_script_iframe.js": contentScriptIframe,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  let contentScriptIframeCreatedPromise = new Promise(resolve => {
-    extension.onMessage("content-script-iframe-loaded", () => { resolve(); });
-  });
-
-  yield extension.startup();
-  info("extension loaded");
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), contentScriptIframeCreatedPromise]);
-  info("content script privileged iframe loaded and executed");
-
-  info("testing APIs availability once the extension is unloaded...");
-
-  let iframeWindow = SpecialPowers.wrap(win)[0];
-
-  ok(iframeWindow, "content script enabled iframe found");
-  ok(/content_script_iframe\.html$/.test(iframeWindow.location), "the found iframe has the expected URL");
-
-  yield extension.unload();
-  info("extension unloaded");
-
-  info("test content script APIs not accessible from the frame once the extension is unloaded");
-
-  let ww = SpecialPowers.Cu.waiveXrays(iframeWindow);
-  let isDeadWrapper = SpecialPowers.Cu.isDeadWrapper(ww.browser);
-  ok(!isDeadWrapper, "the API object should not be a dead object");
-
-  let manifest;
-  let manifestException;
-
-  try {
-    manifest = ww.browser.runtime.getManifest();
-  } catch (e) {
-    manifestException = e;
-  }
-
-  ok(!manifest, "manifest should be undefined");
-
-  is(String(manifestException), "TypeError: ww.browser.runtime is undefined",
-     "expected exception received");
-
-  let getManifestException = ww.testGetManifestException();
-
-  is(getManifestException, "TypeError: can't access dead object",
-     "expected exception received");
-
-  win.close();
-
-  info("done");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_css.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_css.html
deleted file mode 100644
index 5630a1d68..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_css.html
+++ /dev/null
@@ -1,48 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_content_script_css() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "css": ["content.css"],
-      }],
-    },
-
-    files: {
-      "content.css": "body { max-width: 42px; }",
-    },
-  });
-
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield waitForLoad(win);
-
-  let style = win.getComputedStyle(win.document.body);
-  is(style.maxWidth, "42px", "Stylesheet correctly applied");
-
-  yield extension.unload();
-
-  style = win.getComputedStyle(win.document.body);
-  is(style.maxWidth, "none", "Stylesheet correctly removed");
-
-  win.close();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_devtools_metadata.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_devtools_metadata.html
deleted file mode 100644
index 137a3cda4..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_devtools_metadata.html
+++ /dev/null
@@ -1,81 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for Sandbox metadata on WebExtensions ContentScripts</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript_devtools_sandbox_metadata() {
-  function contentScript() {
-    browser.runtime.sendMessage("contentScript.executed");
-  }
-
-  function background() {
-    browser.runtime.onMessage.addListener((msg) => {
-      if (msg == "contentScript.executed") {
-        browser.test.notifyPass("contentScript.executed");
-      }
-    });
-  }
-
-  let extensionData = {
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-          "run_at": "document_idle",
-        },
-      ],
-    },
-
-    background,
-    files: {
-      "content_script.js": contentScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  let innerWindowID = SpecialPowers.wrap(win)
-                                   .QueryInterface(SpecialPowers.Ci.nsIInterfaceRequestor)
-                                   .getInterface(SpecialPowers.Ci.nsIDOMWindowUtils)
-                                   .currentInnerWindowID;
-
-  yield extension.awaitFinish("contentScript.executed");
-
-  const {ExtensionContent} = SpecialPowers.Cu.import(
-    "resource://gre/modules/ExtensionContent.jsm", {}
-  );
-
-  let res = ExtensionContent.getContentScriptGlobalsForWindow(win);
-  is(res.length, 1, "Got the expected array of globals");
-  let metadata = SpecialPowers.Cu.getSandboxMetadata(res[0]) || {};
-
-  is(metadata.addonId, extension.id, "Got the expected addonId");
-  is(metadata["inner-window-id"], innerWindowID, "Got the expected inner-window-id");
-
-  yield extension.unload();
-  info("extension unloaded");
-
-  res = ExtensionContent.getContentScriptGlobalsForWindow(win);
-  is(res.length, 0, "No content scripts globals found once the extension is unloaded");
-
-  win.close();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_exporthelpers.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_exporthelpers.html
deleted file mode 100644
index f3414901d..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_exporthelpers.html
+++ /dev/null
@@ -1,95 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-add_task(function* test_contentscript_exportHelpers() {
-  function contentScript() {
-    browser.test.assertTrue(typeof cloneInto === "function");
-    browser.test.assertTrue(typeof createObjectIn === "function");
-    browser.test.assertTrue(typeof exportFunction === "function");
-
-    /* globals exportFunction, precisePi, reportPi */
-    let value = 3.14;
-    exportFunction(() => value, window, {defineAs: "precisePi"});
-
-    browser.test.assertEq("undefined", typeof precisePi,
-        "exportFunction should export to the page's scope only");
-
-    browser.test.assertEq("undefined", typeof window.precisePi,
-        "exportFunction should export to the page's scope only");
-
-    let results = [];
-    exportFunction(pi => results.push(pi), window, {defineAs: "reportPi"});
-
-    let s = document.createElement("script");
-    s.textContent = `(${function() {
-      let result1 = "unknown 1";
-      let result2 = "unknown 2";
-      try {
-        result1 = precisePi();
-      } catch (e) {
-        result1 = "err:" + e;
-      }
-      try {
-        result2 = window.precisePi();
-      } catch (e) {
-        result2 = "err:" + e;
-      }
-      reportPi(result1);
-      reportPi(result2);
-    }})();`;
-
-    document.documentElement.appendChild(s);
-    // Inline script ought to run synchronously.
-
-    browser.test.assertEq(3.14, results[0],
-        "exportFunction on window should define a global function");
-    browser.test.assertEq(3.14, results[1],
-        "exportFunction on window should export a property to window.");
-
-    browser.test.assertEq(2, results.length,
-        "Expecting the number of results to match the number of method calls");
-
-    browser.test.notifyPass("export helper test completed");
-  }
-
-  let extensionData = {
-    manifest: {
-      content_scripts: [{
-        js: ["contentscript.js"],
-        matches: ["http://mochi.test/*/file_sample.html"],
-        run_at: "document_start",
-      }],
-    },
-
-    files: {
-      "contentscript.js": contentScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield extension.awaitFinish("export helper test completed");
-  win.close();
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_incognito.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_incognito.html
deleted file mode 100644
index a2f38dce6..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_incognito.html
+++ /dev/null
@@ -1,89 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script private browsing ID</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript_incognito() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-        },
-      ],
-    },
-
-    background() {
-      let windowId;
-
-      browser.test.onMessage.addListener(([msg, url]) => {
-        if (msg === "open-window") {
-          browser.windows.create({url, incognito: true}).then(window => {
-            windowId = window.id;
-          });
-        } else if (msg === "close-window") {
-          browser.windows.remove(windowId).then(() => {
-            browser.test.sendMessage("done");
-          });
-        }
-      });
-    },
-
-    files: {
-      "content_script.js": async () => {
-        const COOKIE = "foo=florgheralzps";
-        document.cookie = COOKIE;
-
-        let url = new URL("return_headers.sjs", location.href);
-
-        let responses = [
-          new Promise(resolve => {
-            let xhr = new XMLHttpRequest();
-            xhr.open("GET", url);
-            xhr.onload = () => resolve(JSON.parse(xhr.responseText));
-            xhr.send();
-          }),
-
-          fetch(url, {credentials: "include"}).then(body => body.json()),
-        ];
-
-        try {
-          for (let response of await Promise.all(responses)) {
-            browser.test.assertEq(COOKIE, response.cookie, "Got expected cookie header");
-          }
-          browser.test.notifyPass("cookies");
-        } catch (e) {
-          browser.test.fail(`Error: ${e}`);
-          browser.test.notifyFail("cookies");
-        }
-      },
-    },
-  });
-
-  yield extension.startup();
-
-  extension.sendMessage(["open-window", SimpleTest.getTestFileURL("file_sample.html")]);
-
-  yield extension.awaitFinish("cookies");
-
-  extension.sendMessage(["close-window"]);
-  yield extension.awaitMessage("done");
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
-
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_permission.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_permission.html
deleted file mode 100644
index eaf815092..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_permission.html
+++ /dev/null
@@ -1,59 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript() {
-  function background() {
-    browser.test.onMessage.addListener(url => {
-      browser.tabs.create({url}).then(tab => {
-        return browser.tabs.executeScript(tab.id, {code: "true;"})
-                      .then(() => {
-                        browser.test.sendMessage("executed", true);
-                        browser.tabs.remove([tab.id]);
-                      }, err => {
-                        browser.test.sendMessage("executed", false);
-                        browser.tabs.remove([tab.id]);
-                      });
-      });
-    });
-  }
-
-  let extensionData = {
-    manifest: {
-      permissions: ["<all_urls>"],
-    },
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  extension.sendMessage("https://example.com");
-  let result = yield extension.awaitMessage("executed");
-  is(result, true, "Content script can be run in a page without mozAddonManager");
-
-  yield SpecialPowers.pushPrefEnv({
-    set: [["extensions.webapi.testing", true]],
-  });
-
-  extension.sendMessage("https://example.com");
-  result = yield extension.awaitMessage("executed");
-  is(result, false, "Content script cannot be run in a page with mozAddonManager");
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_teardown.html b/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_teardown.html
deleted file mode 100644
index 33a8c4ccc..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_contentscript_teardown.html
+++ /dev/null
@@ -1,96 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script teardown</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-add_task(function* test_contentscript_reload_and_unload() {
-  function contentScript() {
-    browser.test.sendMessage("contentscript-run");
-  }
-  function background() {
-    let removedTabs = 0;
-    browser.tabs.onRemoved.addListener(() => {
-      browser.test.assertEq(1, ++removedTabs,
-          "Expected only one tab to be removed during the test");
-      browser.test.sendMessage("tab-closed");
-    });
-  }
-
-  let extensionData = {
-    background,
-    manifest: {
-      content_scripts: [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "js": ["contentscript.js"],
-      }],
-    },
-
-    files: {
-      "contentscript.js": contentScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let chromeScript = SpecialPowers.loadChromeScript(
-      SimpleTest.getTestFileURL("file_teardown_test.js"));
-  yield chromeScript.promiseOneMessage("chromescript-startup");
-  function* getContextEvents() {
-    chromeScript.sendAsyncMessage("get-context-events");
-    let contextEvents = yield chromeScript.promiseOneMessage("context-events");
-    return contextEvents.filter(event => event.extensionId == extension.id);
-  }
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitMessage("contentscript-run");
-  let tabUrl = win.location.href;
-
-  let contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 1,
-      "ExtensionContext state change after loading a content script");
-  is(contextEvents[0].eventType, "load",
-      "Create ExtensionContext for content script");
-  is(contextEvents[0].url, tabUrl, "ExtensionContext URL = page");
-
-  let promiseReload = extension.awaitMessage("contentscript-run");
-  win.location.reload();
-  yield promiseReload;
-  contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 2,
-      "ExtensionContext state changes after reloading a content script");
-  is(contextEvents[0].eventType, "unload", "Unload old ExtensionContext");
-  is(contextEvents[0].url, tabUrl, "ExtensionContext URL = page");
-  is(contextEvents[1].eventType, "load",
-      "Create new ExtensionContext for content script");
-  is(contextEvents[1].url, tabUrl, "ExtensionContext URL = page");
-
-  let tabClosePromise = extension.awaitMessage("tab-closed");
-  win.close();
-  yield tabClosePromise;
-
-  contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 1,
-      "ExtensionContext state change after unloading a content script");
-  is(contextEvents[0].eventType, "unload",
-      "Unload ExtensionContext after closing the tab with the content script");
-  is(contextEvents[0].url, tabUrl, "ExtensionContext URL = page");
-
-  chromeScript.sendAsyncMessage("cleanup");
-  chromeScript.destroy();
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_cookies.html b/toolkit/components/webextensions/test/mochitest/test_ext_cookies.html
deleted file mode 100644
index d414a4e46..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_cookies.html
+++ /dev/null
@@ -1,234 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_cookies() {
-  async function background() {
-    function assertExpected(expected, cookie) {
-      for (let key of Object.keys(cookie)) {
-        browser.test.assertTrue(key in expected, `found property ${key}`);
-        browser.test.assertEq(expected[key], cookie[key], `property value for ${key} is correct`);
-      }
-      browser.test.assertEq(Object.keys(expected).length, Object.keys(cookie).length, "all expected properties found");
-    }
-
-    const TEST_URL = "http://example.org/";
-    const TEST_SECURE_URL = "https://example.org/";
-    const THE_FUTURE = Date.now() + 5 * 60;
-    const TEST_PATH = "set_path";
-    const TEST_URL_WITH_PATH = TEST_URL + TEST_PATH;
-    const TEST_COOKIE_PATH = `/${TEST_PATH}`;
-    const STORE_ID = "firefox-default";
-    const PRIVATE_STORE_ID = "firefox-private";
-
-    let expected = {
-      name: "name1",
-      value: "value1",
-      domain: "example.org",
-      hostOnly: true,
-      path: "/",
-      secure: false,
-      httpOnly: false,
-      session: false,
-      expirationDate: THE_FUTURE,
-      storeId: STORE_ID,
-    };
-
-    let cookie = await browser.cookies.set({url: TEST_URL, name: "name1", value: "value1", expirationDate: THE_FUTURE});
-    assertExpected(expected, cookie);
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1"});
-    assertExpected(expected, cookie);
-
-    let cookies = await browser.cookies.getAll({name: "name1"});
-    browser.test.assertEq(cookies.length, 1, "one cookie found for matching name");
-    assertExpected(expected, cookies[0]);
-
-    cookies = await browser.cookies.getAll({domain: "example.org"});
-    browser.test.assertEq(cookies.length, 1, "one cookie found for matching domain");
-    assertExpected(expected, cookies[0]);
-
-    cookies = await browser.cookies.getAll({domain: "example.net"});
-    browser.test.assertEq(cookies.length, 0, "no cookies found for non-matching domain");
-
-    cookies = await browser.cookies.getAll({secure: false});
-    browser.test.assertEq(cookies.length, 1, "one non-secure cookie found");
-    assertExpected(expected, cookies[0]);
-
-    cookies = await browser.cookies.getAll({secure: true});
-    browser.test.assertEq(cookies.length, 0, "no secure cookies found");
-
-    cookies = await browser.cookies.getAll({storeId: STORE_ID});
-    browser.test.assertEq(cookies.length, 1, "one cookie found for valid storeId");
-    assertExpected(expected, cookies[0]);
-
-    cookies = await browser.cookies.getAll({storeId: "invalid_id"});
-    browser.test.assertEq(cookies.length, 0, "no cookies found for invalid storeId");
-
-    let details = await browser.cookies.remove({url: TEST_URL, name: "name1"});
-    assertExpected({url: TEST_URL, name: "name1", storeId: STORE_ID}, details);
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1"});
-    browser.test.assertEq(null, cookie, "removed cookie not found");
-
-    let stores = await browser.cookies.getAllCookieStores();
-    browser.test.assertEq(1, stores.length, "expected number of stores returned");
-    browser.test.assertEq(STORE_ID, stores[0].id, "expected store id returned");
-    browser.test.assertEq(1, stores[0].tabIds.length, "one tab returned for store");
-
-    {
-      let privateWindow = await browser.windows.create({incognito: true});
-      let stores = await browser.cookies.getAllCookieStores();
-
-      browser.test.assertEq(2, stores.length, "expected number of stores returned");
-      browser.test.assertEq(STORE_ID, stores[0].id, "expected store id returned");
-      browser.test.assertEq(1, stores[0].tabIds.length, "one tab returned for store");
-      browser.test.assertEq(PRIVATE_STORE_ID, stores[1].id, "expected private store id returned");
-      browser.test.assertEq(1, stores[0].tabIds.length, "one tab returned for private store");
-
-      await browser.windows.remove(privateWindow.id);
-    }
-
-    cookie = await browser.cookies.set({url: TEST_URL, name: "name2", domain: ".example.org", expirationDate: THE_FUTURE});
-    browser.test.assertEq(false, cookie.hostOnly, "cookie is not a hostOnly cookie");
-
-    details = await browser.cookies.remove({url: TEST_URL, name: "name2"});
-    assertExpected({url: TEST_URL, name: "name2", storeId: STORE_ID}, details);
-
-    // Create a session cookie.
-    cookie = await browser.cookies.set({url: TEST_URL, name: "name1", value: "value1"});
-    browser.test.assertEq(true, cookie.session, "session cookie set");
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1"});
-    browser.test.assertEq(true, cookie.session, "got session cookie");
-
-    cookies = await browser.cookies.getAll({session: true});
-    browser.test.assertEq(cookies.length, 1, "one session cookie found");
-    browser.test.assertEq(true, cookies[0].session, "found session cookie");
-
-    cookies = await browser.cookies.getAll({session: false});
-    browser.test.assertEq(cookies.length, 0, "no non-session cookies found");
-
-    details = await browser.cookies.remove({url: TEST_URL, name: "name1"});
-    assertExpected({url: TEST_URL, name: "name1", storeId: STORE_ID}, details);
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1"});
-    browser.test.assertEq(null, cookie, "removed cookie not found");
-
-    cookie = await browser.cookies.set({url: TEST_SECURE_URL, name: "name1", value: "value1", secure: true});
-    browser.test.assertEq(true, cookie.secure, "secure cookie set");
-
-    cookie = await browser.cookies.get({url: TEST_SECURE_URL, name: "name1"});
-    browser.test.assertEq(true, cookie.session, "got secure cookie");
-
-    cookies = await browser.cookies.getAll({secure: true});
-    browser.test.assertEq(cookies.length, 1, "one secure cookie found");
-    browser.test.assertEq(true, cookies[0].secure, "found secure cookie");
-
-    cookies = await browser.cookies.getAll({secure: false});
-    browser.test.assertEq(cookies.length, 0, "no non-secure cookies found");
-
-    details = await browser.cookies.remove({url: TEST_SECURE_URL, name: "name1"});
-    assertExpected({url: TEST_SECURE_URL, name: "name1", storeId: STORE_ID}, details);
-
-    cookie = await browser.cookies.get({url: TEST_SECURE_URL, name: "name1"});
-    browser.test.assertEq(null, cookie, "removed cookie not found");
-
-    cookie = await browser.cookies.set({url: TEST_URL_WITH_PATH, path: TEST_COOKIE_PATH, name: "name1", value: "value1", expirationDate: THE_FUTURE});
-    browser.test.assertEq(TEST_COOKIE_PATH, cookie.path, "created cookie with path");
-
-    cookie = await browser.cookies.get({url: TEST_URL_WITH_PATH, name: "name1"});
-    browser.test.assertEq(TEST_COOKIE_PATH, cookie.path, "got cookie with path");
-
-    cookies = await browser.cookies.getAll({path: TEST_COOKIE_PATH});
-    browser.test.assertEq(cookies.length, 1, "one cookie with path found");
-    browser.test.assertEq(TEST_COOKIE_PATH, cookies[0].path, "found cookie with path");
-
-    cookie = await browser.cookies.get({url: TEST_URL + "invalid_path", name: "name1"});
-    browser.test.assertEq(null, cookie, "get with invalid path returns null");
-
-    cookies = await browser.cookies.getAll({path: "/invalid_path"});
-    browser.test.assertEq(cookies.length, 0, "getAll with invalid path returns 0 cookies");
-
-    details = await browser.cookies.remove({url: TEST_URL_WITH_PATH, name: "name1"});
-    assertExpected({url: TEST_URL_WITH_PATH, name: "name1", storeId: STORE_ID}, details);
-
-    cookie = await browser.cookies.set({url: TEST_URL, name: "name1", value: "value1", httpOnly: true});
-    browser.test.assertEq(true, cookie.httpOnly, "httpOnly cookie set");
-
-    cookie = await browser.cookies.set({url: TEST_URL, name: "name1", value: "value1", httpOnly: false});
-    browser.test.assertEq(false, cookie.httpOnly, "non-httpOnly cookie set");
-
-    details = await browser.cookies.remove({url: TEST_URL, name: "name1"});
-    assertExpected({url: TEST_URL, name: "name1", storeId: STORE_ID}, details);
-
-    cookie = await browser.cookies.set({url: TEST_URL});
-    browser.test.assertEq("", cookie.name, "default name set");
-    browser.test.assertEq("", cookie.value, "default value set");
-    browser.test.assertEq(true, cookie.session, "no expiry date created session cookie");
-
-    {
-      let privateWindow = await browser.windows.create({incognito: true});
-
-      // Hacky work-around for bugzil.la/1309637
-      await new Promise(resolve => setTimeout(resolve, 700));
-
-      let cookie = await browser.cookies.set({url: TEST_URL, name: "store", value: "private", expirationDate: THE_FUTURE, storeId: PRIVATE_STORE_ID});
-      browser.test.assertEq("private", cookie.value, "set the private cookie");
-
-      cookie = await browser.cookies.set({url: TEST_URL, name: "store", value: "default", expirationDate: THE_FUTURE, storeId: STORE_ID});
-      browser.test.assertEq("default", cookie.value, "set the default cookie");
-
-      cookie = await browser.cookies.get({url: TEST_URL, name: "store", storeId: PRIVATE_STORE_ID});
-      browser.test.assertEq("private", cookie.value, "get the private cookie");
-      browser.test.assertEq(PRIVATE_STORE_ID, cookie.storeId, "get the private cookie storeId");
-
-      cookie = await browser.cookies.get({url: TEST_URL, name: "store", storeId: STORE_ID});
-      browser.test.assertEq("default", cookie.value, "get the default cookie");
-      browser.test.assertEq(STORE_ID, cookie.storeId, "get the default cookie storeId");
-
-      let details = await browser.cookies.remove({url: TEST_URL, name: "store", storeId: STORE_ID});
-      assertExpected({url: TEST_URL, name: "store", storeId: STORE_ID}, details);
-
-      cookie = await browser.cookies.get({url: TEST_URL, name: "store", storeId: STORE_ID});
-      browser.test.assertEq(null, cookie, "deleted the default cookie");
-
-      details = await browser.cookies.remove({url: TEST_URL, name: "store", storeId: PRIVATE_STORE_ID});
-      assertExpected({url: TEST_URL, name: "store", storeId: PRIVATE_STORE_ID}, details);
-
-      cookie = await browser.cookies.get({url: TEST_URL, name: "store", storeId: PRIVATE_STORE_ID});
-      browser.test.assertEq(null, cookie, "deleted the private cookie");
-
-      await browser.windows.remove(privateWindow.id);
-    }
-
-    browser.test.notifyPass("cookies");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["cookies", "*://example.org/"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("cookies");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_containers.html b/toolkit/components/webextensions/test/mochitest/test_ext_cookies_containers.html
deleted file mode 100644
index bc4994eec..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_containers.html
+++ /dev/null
@@ -1,93 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* setup() {
-  // make sure userContext is enabled.
-  return SpecialPowers.pushPrefEnv({"set": [
-    ["privacy.userContext.enabled", true],
-  ]});
-});
-
-add_task(function* test_cookie_containers() {
-  async function background() {
-    function assertExpected(expected, cookie) {
-      for (let key of Object.keys(cookie)) {
-        browser.test.assertTrue(key in expected, `found property ${key}`);
-        browser.test.assertEq(expected[key], cookie[key], `property value for ${key} is correct`);
-      }
-      browser.test.assertEq(Object.keys(expected).length, Object.keys(cookie).length, "all expected properties found");
-    }
-
-    const TEST_URL = "http://example.org/";
-    const THE_FUTURE = Date.now() + 5 * 60;
-
-    let expected = {
-      name: "name1",
-      value: "value1",
-      domain: "example.org",
-      hostOnly: true,
-      path: "/",
-      secure: false,
-      httpOnly: false,
-      session: false,
-      expirationDate: THE_FUTURE,
-      storeId: "firefox-container-1",
-    };
-
-    let cookie = await browser.cookies.set({
-      url: TEST_URL, name: "name1", value: "value1",
-      expirationDate: THE_FUTURE, storeId: "firefox-container-1",
-    });
-    browser.test.assertEq("firefox-container-1", cookie.storeId, "the cookie has the correct storeId");
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1"});
-    browser.test.assertEq(null, cookie, "get() without storeId returns null");
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1", storeId: "firefox-container-1"});
-    assertExpected(expected, cookie);
-
-    let cookies = await browser.cookies.getAll({storeId: "firefox-default"});
-    browser.test.assertEq(0, cookies.length, "getAll() with default storeId returns an empty array");
-
-    cookies = await browser.cookies.getAll({storeId: "firefox-container-1"});
-    browser.test.assertEq(1, cookies.length, "one cookie found for matching domain");
-    assertExpected(expected, cookies[0]);
-
-    let details = await browser.cookies.remove({url: TEST_URL, name: "name1", storeId: "firefox-container-1"});
-    assertExpected({url: TEST_URL, name: "name1", storeId: "firefox-container-1"}, details);
-
-    cookie = await browser.cookies.get({url: TEST_URL, name: "name1", storeId: "firefox-container-1"});
-    browser.test.assertEq(null, cookie, "removed cookie not found");
-
-    browser.test.notifyPass("cookies");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["cookies", "*://example.org/"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("cookies");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_expiry.html b/toolkit/components/webextensions/test/mochitest/test_ext_cookies_expiry.html
deleted file mode 100644
index 3927d9e94..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_expiry.html
+++ /dev/null
@@ -1,72 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_cookies_expiry() {
-  function background() {
-    let expectedEvents = [];
-
-    browser.cookies.onChanged.addListener(event => {
-      expectedEvents.push(`${event.removed}:${event.cause}`);
-      if (expectedEvents.length === 1) {
-        browser.test.assertEq("true:expired", expectedEvents[0], "expired cookie removed");
-        browser.test.assertEq("first", event.cookie.name, "expired cookie has the expected name");
-        browser.test.assertEq("one", event.cookie.value, "expired cookie has the expected value");
-      } else {
-        browser.test.assertEq("false:explicit", expectedEvents[1], "new cookie added");
-        browser.test.assertEq("first", event.cookie.name, "new cookie has the expected name");
-        browser.test.assertEq("one-again", event.cookie.value, "new cookie has the expected value");
-        browser.test.notifyPass("cookie-expiry");
-      }
-    });
-
-    setTimeout(() => {
-      browser.test.sendMessage("change-cookies");
-    }, 1000);
-  }
-
-  let domain = ".example.com";
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "permissions": ["http://example.com/", "cookies"],
-    },
-    background,
-  });
-
-  let cookieSvc = SpecialPowers.Services.cookies;
-
-  let cookie = {
-    host: domain,
-    name: "first",
-    path: "/",
-  };
-
-  do {
-    cookieSvc.add(cookie.host, cookie.path, cookie.name, "one", false, false, false, Date.now() / 1000 + 1);
-  } while (!cookieSvc.cookieExists(cookie));
-
-  yield extension.startup();
-  yield extension.awaitMessage("change-cookies");
-
-  cookieSvc.add(cookie.host, cookie.path, cookie.name, "one-again", false, false, false, Date.now() / 1000 + 10);
-
-  yield extension.awaitFinish("cookie-expiry");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_bad.html b/toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_bad.html
deleted file mode 100644
index 15a62855a..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_bad.html
+++ /dev/null
@@ -1,112 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <script type="text/javascript" src="head_cookies.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* init() {
-  // We need to trigger a cookie eviction in order to test our batch delete
-  // observer.
-  SpecialPowers.setIntPref("network.cookie.maxPerHost", 3);
-  SimpleTest.registerCleanupFunction(() => {
-    SpecialPowers.clearUserPref("network.cookie.maxPerHost");
-  });
-});
-
-add_task(function* test_bad_cookie_permissions() {
-  info("Test non-matching, non-secure domain with non-secure cookie");
-  yield testCookies({
-    permissions: ["http://example.com/", "cookies"],
-    url: "http://example.net/",
-    domain: "example.net",
-    secure: false,
-    shouldPass: false,
-    shouldWrite: false,
-  });
-
-  info("Test non-matching, secure domain with non-secure cookie");
-  yield testCookies({
-    permissions: ["https://example.com/", "cookies"],
-    url: "https://example.net/",
-    domain: "example.net",
-    secure: false,
-    shouldPass: false,
-    shouldWrite: false,
-  });
-
-  info("Test non-matching, secure domain with secure cookie");
-  yield testCookies({
-    permissions: ["https://example.com/", "cookies"],
-    url: "https://example.net/",
-    domain: "example.net",
-    secure: false,
-    shouldPass: false,
-    shouldWrite: false,
-  });
-
-  info("Test matching subdomain with superdomain privileges, secure cookie (http)");
-  yield testCookies({
-    permissions: ["http://foo.bar.example.com/", "cookies"],
-    url: "http://foo.bar.example.com/",
-    domain: ".example.com",
-    secure: true,
-    shouldPass: false,
-    shouldWrite: true,
-  });
-
-  info("Test matching, non-secure domain with secure cookie");
-  yield testCookies({
-    permissions: ["http://example.com/", "cookies"],
-    url: "http://example.com/",
-    domain: "example.com",
-    secure: true,
-    shouldPass: false,
-    shouldWrite: true,
-  });
-
-  info("Test matching, non-secure host, secure URL");
-  yield testCookies({
-    permissions: ["http://example.com/", "cookies"],
-    url: "https://example.com/",
-    domain: "example.com",
-    secure: true,
-    shouldPass: false,
-    shouldWrite: false,
-  });
-
-  info("Test non-matching domain");
-  yield testCookies({
-    permissions: ["http://example.com/", "cookies"],
-    url: "http://example.com/",
-    domain: "example.net",
-    secure: false,
-    shouldPass: false,
-    shouldWrite: false,
-  });
-
-  info("Test invalid scheme");
-  yield testCookies({
-    permissions: ["ftp://example.com/", "cookies"],
-    url: "ftp://example.com/",
-    domain: "example.com",
-    secure: false,
-    shouldPass: false,
-    shouldWrite: false,
-  });
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_good.html b/toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_good.html
deleted file mode 100644
index 31e83188c..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_cookies_permissions_good.html
+++ /dev/null
@@ -1,86 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <script type="text/javascript" src="head_cookies.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* init() {
-  // We need to trigger a cookie eviction in order to test our batch delete
-  // observer.
-  SpecialPowers.setIntPref("network.cookie.maxPerHost", 3);
-  SimpleTest.registerCleanupFunction(() => {
-    SpecialPowers.clearUserPref("network.cookie.maxPerHost");
-  });
-});
-
-add_task(function* test_good_cookie_permissions() {
-  info("Test matching, non-secure domain with non-secure cookie");
-  yield testCookies({
-    permissions: ["http://example.com/", "cookies"],
-    url: "http://example.com/",
-    domain: "example.com",
-    secure: false,
-    shouldPass: true,
-  });
-
-  info("Test matching, secure domain with non-secure cookie");
-  yield testCookies({
-    permissions: ["https://example.com/", "cookies"],
-    url: "https://example.com/",
-    domain: "example.com",
-    secure: false,
-    shouldPass: true,
-  });
-
-  info("Test matching, secure domain with secure cookie");
-  yield testCookies({
-    permissions: ["https://example.com/", "cookies"],
-    url: "https://example.com/",
-    domain: "example.com",
-    secure: true,
-    shouldPass: true,
-  });
-
-  info("Test matching subdomain with superdomain privileges, secure cookie (https)");
-  yield testCookies({
-    permissions: ["https://foo.bar.example.com/", "cookies"],
-    url: "https://foo.bar.example.com/",
-    domain: ".example.com",
-    secure: true,
-    shouldPass: true,
-  });
-
-  info("Test matching subdomain with superdomain privileges, non-secure cookie (https)");
-  yield testCookies({
-    permissions: ["https://foo.bar.example.com/", "cookies"],
-    url: "https://foo.bar.example.com/",
-    domain: ".example.com",
-    secure: false,
-    shouldPass: true,
-  });
-
-  info("Test matching subdomain with superdomain privileges, non-secure cookie  (http)");
-  yield testCookies({
-    permissions: ["http://foo.bar.example.com/", "cookies"],
-    url: "http://foo.bar.example.com/",
-    domain: ".example.com",
-    secure: false,
-    shouldPass: true,
-  });
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_exclude_include_globs.html b/toolkit/components/webextensions/test/mochitest/test_ext_exclude_include_globs.html
deleted file mode 100644
index 640522b40..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_exclude_include_globs.html
+++ /dev/null
@@ -1,92 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_contentscript() {
-  function background() {
-    browser.runtime.onMessage.addListener(([script], sender) => {
-      browser.test.sendMessage("run", {script});
-      browser.test.sendMessage("run-" + script);
-    });
-    browser.test.sendMessage("running");
-  }
-
-  function contentScriptAll() {
-    browser.runtime.sendMessage(["all"]);
-  }
-  function contentScriptIncludesTest1() {
-    browser.runtime.sendMessage(["includes-test1"]);
-  }
-  function contentScriptExcludesTest1() {
-    browser.runtime.sendMessage(["excludes-test1"]);
-  }
-
-  let extensionData = {
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://example.org/", "http://*.example.org/"],
-          "exclude_globs": [],
-          "include_globs": ["*"],
-          "js": ["content_script_all.js"],
-        },
-        {
-          "matches": ["http://example.org/", "http://*.example.org/"],
-          "include_globs": ["*test1*"],
-          "js": ["content_script_includes_test1.js"],
-        },
-        {
-          "matches": ["http://example.org/", "http://*.example.org/"],
-          "exclude_globs": ["*test1*"],
-          "js": ["content_script_excludes_test1.js"],
-        },
-      ],
-    },
-    background,
-
-    files: {
-      "content_script_all.js": contentScriptAll,
-      "content_script_includes_test1.js": contentScriptIncludesTest1,
-      "content_script_excludes_test1.js": contentScriptExcludesTest1,
-    },
-
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  let ran = 0;
-  extension.onMessage("run", ({script}) => {
-    ran++;
-  });
-
-  yield Promise.all([extension.startup(), extension.awaitMessage("running")]);
-  info("extension loaded");
-
-  let win = window.open("http://example.org/");
-  yield Promise.all([extension.awaitMessage("run-all"), extension.awaitMessage("run-excludes-test1")]);
-  win.close();
-  is(ran, 2);
-
-  win = window.open("http://test1.example.org/");
-  yield Promise.all([extension.awaitMessage("run-all"), extension.awaitMessage("run-includes-test1")]);
-  win.close();
-  is(ran, 4);
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html b/toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html
deleted file mode 100644
index dfc1f9427..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html
+++ /dev/null
@@ -1,111 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension external messaging</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function backgroundScript(id, otherId) {
-  browser.runtime.onMessage.addListener((msg, sender) => {
-    browser.test.fail(`Got unexpected message: ${uneval(msg)} ${uneval(sender)}`);
-  });
-
-  browser.runtime.onConnect.addListener(port => {
-    browser.test.fail(`Got unexpected connection: ${uneval(port.sender)}`);
-  });
-
-  browser.runtime.onMessageExternal.addListener((msg, sender) => {
-    browser.test.assertEq(otherId, sender.id, `${id}: Got expected external sender ID`);
-    browser.test.assertEq(`helo-${id}`, msg, "Got expected message");
-
-    browser.test.sendMessage("onMessage-done");
-
-    return Promise.resolve(`ehlo-${otherId}`);
-  });
-
-  browser.runtime.onConnectExternal.addListener(port => {
-    browser.test.assertEq(otherId, port.sender.id, `${id}: Got expected external connecter ID`);
-
-    port.onMessage.addListener(msg => {
-      browser.test.assertEq(`helo-${id}`, msg, "Got expected port message");
-
-      port.postMessage(`ehlo-${otherId}`);
-
-      browser.test.sendMessage("onConnect-done");
-    });
-  });
-
-  browser.test.onMessage.addListener(msg => {
-    if (msg === "go") {
-      browser.runtime.sendMessage(otherId, `helo-${otherId}`).then(result => {
-        browser.test.assertEq(`ehlo-${id}`, result, "Got expected reply");
-        browser.test.sendMessage("sendMessage-done");
-      });
-
-      let port = browser.runtime.connect(otherId);
-      port.postMessage(`helo-${otherId}`);
-
-      port.onMessage.addListener(msg => {
-        port.disconnect();
-
-        browser.test.assertEq(msg, `ehlo-${id}`, "Got expected port reply");
-        browser.test.sendMessage("connect-done");
-      });
-    }
-  });
-}
-
-function makeExtension(id, otherId) {
-  let args = `${JSON.stringify(id)}, ${JSON.stringify(otherId)}`;
-
-  let extensionData = {
-    background: `(${backgroundScript})(${args})`,
-    manifest: {
-      "applications": {"gecko": {id}},
-    },
-  };
-
-  return ExtensionTestUtils.loadExtension(extensionData);
-}
-
-add_task(function* test_contentscript() {
-  const ID1 = "foo-message@mochitest.mozilla.org";
-  const ID2 = "bar-message@mochitest.mozilla.org";
-
-  let extension1 = makeExtension(ID1, ID2);
-  let extension2 = makeExtension(ID2, ID1);
-
-  yield Promise.all([extension1.startup(), extension2.startup()]);
-
-  extension1.sendMessage("go");
-  extension2.sendMessage("go");
-
-  yield Promise.all([
-    extension1.awaitMessage("sendMessage-done"),
-    extension2.awaitMessage("sendMessage-done"),
-
-    extension1.awaitMessage("onMessage-done"),
-    extension2.awaitMessage("onMessage-done"),
-
-    extension1.awaitMessage("connect-done"),
-    extension2.awaitMessage("connect-done"),
-
-    extension1.awaitMessage("onConnect-done"),
-    extension2.awaitMessage("onConnect-done"),
-  ]);
-
-  yield extension1.unload();
-  yield extension2.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_generate.html b/toolkit/components/webextensions/test/mochitest/test_ext_generate.html
deleted file mode 100644
index cfafcbad9..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_generate.html
+++ /dev/null
@@ -1,49 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for generating WebExtensions</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  browser.test.log("running background script");
-
-  browser.test.onMessage.addListener((x, y) => {
-    browser.test.assertEq(x, 10, "x is 10");
-    browser.test.assertEq(y, 20, "y is 20");
-
-    browser.test.notifyPass("background test passed");
-  });
-
-  browser.test.sendMessage("running", 1);
-}
-
-let extensionData = {
-  background,
-};
-
-add_task(function* test_background() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  info("load complete");
-  let [, x] = yield Promise.all([extension.startup(), extension.awaitMessage("running")]);
-  is(x, 1, "got correct value from extension");
-  info("startup complete");
-  extension.sendMessage(10, 20);
-  yield extension.awaitFinish();
-  info("test complete");
-  yield extension.unload();
-  info("extension unloaded successfully");
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_geturl.html b/toolkit/components/webextensions/test/mochitest/test_ext_geturl.html
deleted file mode 100644
index 6e39c2f5d..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_geturl.html
+++ /dev/null
@@ -1,72 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  browser.runtime.onMessage.addListener(([url1, url2]) => {
-    let url3 = browser.runtime.getURL("test_file.html");
-    let url4 = browser.extension.getURL("test_file.html");
-
-    browser.test.assertTrue(url1 !== undefined, "url1 defined");
-
-    browser.test.assertTrue(url1.startsWith("moz-extension://"), "url1 has correct scheme");
-    browser.test.assertTrue(url1.endsWith("test_file.html"), "url1 has correct leaf name");
-
-    browser.test.assertEq(url1, url2, "url2 matches");
-    browser.test.assertEq(url1, url3, "url3 matches");
-    browser.test.assertEq(url1, url4, "url4 matches");
-
-    browser.test.notifyPass("geturl");
-  });
-}
-
-function contentScript() {
-  let url1 = browser.runtime.getURL("test_file.html");
-  let url2 = browser.extension.getURL("test_file.html");
-  browser.runtime.sendMessage([url1, url2]);
-}
-
-let extensionData = {
-  background,
-  manifest: {
-    "content_scripts": [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_idle",
-    }],
-  },
-
-  files: {
-    "content_script.js": contentScript,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), extension.awaitFinish("geturl")]);
-
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_i18n.html b/toolkit/components/webextensions/test/mochitest/test_ext_i18n.html
deleted file mode 100644
index 1f7330bbb..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_i18n.html
+++ /dev/null
@@ -1,432 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset="utf-8">
-  <title>Test for WebExtension localization APIs</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-SimpleTest.registerCleanupFunction(() => { SpecialPowers.clearUserPref("intl.accept_languages"); });
-SimpleTest.registerCleanupFunction(() => { SpecialPowers.clearUserPref("general.useragent.locale"); });
-
-add_task(function* test_i18n() {
-  function runTests(assertEq) {
-    let _ = browser.i18n.getMessage.bind(browser.i18n);
-
-    let url = browser.runtime.getURL("/");
-    assertEq(url, `moz-extension://${_("@@extension_id")}/`, "@@extension_id builtin message");
-
-    assertEq("Foo.", _("Foo"), "Simple message in selected locale.");
-
-    assertEq("(bar)", _("bar"), "Simple message fallback in default locale.");
-
-    assertEq("", _("some-unknown-locale-string"), "Unknown locale string.");
-
-    assertEq("", _("@@unknown_builtin_string"), "Unknown built-in string.");
-    assertEq("", _("@@bidi_unknown_builtin_string"), "Unknown built-in bidi string.");
-
-    assertEq("Føo.", _("Föo"), "Multi-byte message in selected locale.");
-
-    let substitutions = [];
-    substitutions[4] = "5";
-    substitutions[13] = "14";
-
-    assertEq("'$0' '14' '' '5' '$$$$' '$'.", _("basic_substitutions", substitutions),
-             "Basic numeric substitutions");
-
-    assertEq("'$0' '' 'just a string' '' '$$$$' '$'.", _("basic_substitutions", "just a string"),
-             "Basic numeric substitutions, with non-array value");
-
-    let values = _("named_placeholder_substitutions", ["(subst $1 $2)", "(2 $1 $2)"]).split("\n");
-
-    assertEq("_foo_ (subst $1 $2) _bar_", values[0], "Named and numeric substitution");
-
-    assertEq("(2 $1 $2)", values[1], "Numeric substitution amid named placeholders");
-
-    assertEq("$bad name$", values[2], "Named placeholder with invalid key");
-
-    assertEq("", values[3], "Named placeholder with an invalid value");
-
-    assertEq("Accepted, but shouldn't break.", values[4], "Named placeholder with a strange content value");
-
-    assertEq("$foo", values[5], "Non-placeholder token that should be ignored");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "default_locale": "jp",
-
-      content_scripts: [
-        {"matches": ["http://mochi.test/*/file_sample.html"],
-         "js": ["content.js"]},
-      ],
-    },
-
-
-    files: {
-      "_locales/en_US/messages.json": {
-        "foo": {
-          "message": "Foo.",
-          "description": "foo",
-        },
-
-        "föo": {
-          "message": "Føo.",
-          "description": "foo",
-        },
-
-        "basic_substitutions": {
-          "message": "'$0' '$14' '$1' '$5' '$$$$$' '$$'.",
-          "description": "foo",
-        },
-
-        "Named_placeholder_substitutions": {
-          "message": "$Foo$\n$2\n$bad name$\n$bad_value$\n$bad_content_value$\n$foo",
-          "description": "foo",
-          "placeholders": {
-            "foO": {
-              "content": "_foo_ $1 _bar_",
-              "description": "foo",
-            },
-
-            "bad name": {
-              "content": "Nope.",
-              "description": "bad name",
-            },
-
-            "bad_value": "Nope.",
-
-            "bad_content_value": {
-              "content": ["Accepted, but shouldn't break."],
-              "description": "bad value",
-            },
-          },
-        },
-
-        "broken_placeholders": {
-          "message": "$broken$",
-          "description": "broken placeholders",
-          "placeholders": "foo.",
-        },
-      },
-
-      "_locales/jp/messages.json": {
-        "foo": {
-          "message": "(foo)",
-          "description": "foo",
-        },
-
-        "bar": {
-          "message": "(bar)",
-          "description": "bar",
-        },
-      },
-
-      "content.js": "new " + function(runTestsFn) {
-        runTestsFn((...args) => {
-          browser.runtime.sendMessage(["assertEq", ...args]);
-        });
-
-        browser.runtime.sendMessage(["content-script-finished"]);
-      } + `(${runTests})`,
-    },
-
-    background: "new " + function(runTestsFn) {
-      browser.runtime.onMessage.addListener(([msg, ...args]) => {
-        if (msg == "assertEq") {
-          browser.test.assertEq(...args);
-        } else {
-          browser.test.sendMessage(msg, ...args);
-        }
-      });
-
-      runTestsFn(browser.test.assertEq.bind(browser.test));
-    } + `(${runTests})`,
-  });
-
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitMessage("content-script-finished");
-  win.close();
-
-  yield extension.unload();
-});
-
-add_task(function* test_get_accept_languages() {
-  function background() {
-    function checkResults(source, results, expected) {
-      browser.test.assertEq(
-        expected.length,
-        results.length,
-        `got expected number of languages in ${source}`);
-      results.forEach((lang, index) => {
-        browser.test.assertEq(
-          expected[index],
-          lang,
-          `got expected language in ${source}`);
-      });
-    }
-
-    let tabId;
-
-    browser.tabs.query({currentWindow: true, active: true}, tabs => {
-      tabId = tabs[0].id;
-      browser.test.sendMessage("ready");
-    });
-
-    browser.test.onMessage.addListener(async ([msg, expected]) => {
-      let contentResults = await browser.tabs.sendMessage(tabId, "get-results");
-      let backgroundResults = await browser.i18n.getAcceptLanguages();
-
-      checkResults("contentScript", contentResults, expected);
-      checkResults("background", backgroundResults, expected);
-
-      browser.test.sendMessage("done");
-    });
-  }
-
-  function content() {
-    browser.runtime.onMessage.addListener((msg, sender, respond) => {
-      browser.i18n.getAcceptLanguages(respond);
-      return true;
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "run_at": "document_start",
-        "js": ["content_script.js"],
-      }],
-    },
-
-    background,
-
-    files: {
-      "content_script.js": content,
-    },
-  });
-
-  let win = window.open("file_sample.html");
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  let expectedLangs = ["en-US", "en"];
-  extension.sendMessage(["expect-results", expectedLangs]);
-  yield extension.awaitMessage("done");
-
-  expectedLangs = ["en-US", "en", "fr-CA", "fr"];
-  SpecialPowers.setCharPref("intl.accept_languages", expectedLangs.toString());
-  extension.sendMessage(["expect-results", expectedLangs]);
-  yield extension.awaitMessage("done");
-  SpecialPowers.clearUserPref("intl.accept_languages");
-
-  win.close();
-
-  yield extension.unload();
-});
-
-add_task(function* test_get_ui_language() {
-  function getResults() {
-    return {
-      getUILanguage: browser.i18n.getUILanguage(),
-      getMessage: browser.i18n.getMessage("@@ui_locale"),
-    };
-  }
-
-  function background(getResultsFn) {
-    function checkResults(source, results, expected) {
-      browser.test.assertEq(
-        expected,
-        results.getUILanguage,
-        `Got expected getUILanguage result in ${source}`
-      );
-      browser.test.assertEq(
-        expected,
-        results.getMessage,
-        `Got expected getMessage result in ${source}`
-      );
-    }
-
-    let tabId;
-
-    browser.test.onMessage.addListener(([msg, expected]) => {
-      browser.tabs.sendMessage(tabId, "get-results", result => {
-        checkResults("contentScript", result, expected);
-        checkResults("background", getResultsFn(), expected);
-
-        browser.test.sendMessage("done");
-      });
-    });
-
-    browser.tabs.query({currentWindow: true, active: true}, tabs => {
-      tabId = tabs[0].id;
-      browser.test.sendMessage("ready");
-    });
-  }
-
-  function content(getResultsFn) {
-    browser.runtime.onMessage.addListener((msg, sender, respond) => {
-      respond(getResultsFn());
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "run_at": "document_start",
-        "js": ["content_script.js"],
-      }],
-    },
-
-    background: `(${background})(${getResults})`,
-
-    files: {
-      "content_script.js": `(${content})(${getResults})`,
-    },
-  });
-
-  let win = window.open("file_sample.html");
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage(["expect-results", "en_US"]);
-  yield extension.awaitMessage("done");
-
-  SpecialPowers.setCharPref("general.useragent.locale", "he");
-
-  extension.sendMessage(["expect-results", "he"]);
-  yield extension.awaitMessage("done");
-
-  win.close();
-
-  yield extension.unload();
-});
-
-
-add_task(function* test_detect_language() {
-  const af_string = " aam skukuza die naam beteken hy wat skoonvee of hy wat alles onderstebo keer wysig " +
-    "bosveldkampe boskampe is kleiner afgeleë ruskampe wat oor min fasiliteite beskik daar is geen restaurante " +
-    "of winkels nie en slegs oornagbesoekers word toegelaat bateleur";
-  // String with intermixed French/English text
-  const fr_en_string = "France is the largest country in Western Europe and the third-largest in Europe as a whole. " +
-    "A accès aux chiens et aux frontaux qui lui ont été il peut consulter et modifier ses collections et exporter " +
-    "Cet article concerne le pays européen aujourd’hui appelé République française. Pour d’autres usages du nom France, " +
-    "Pour une aide rapide et effective, veuiller trouver votre aide dans le menu ci-dessus." +
-    "Motoring events began soon after the construction of the first successful gasoline-fueled automobiles. The quick brown fox jumped over the lazy dog";
-
-  function background() {
-    function checkResult(source, result, expected) {
-      browser.test.assertEq(expected.isReliable, result.isReliable, "result.confident is true");
-      browser.test.assertEq(
-        expected.languages.length,
-        result.languages.length,
-        `result.languages contains the expected number of languages in ${source}`);
-      expected.languages.forEach((lang, index) => {
-        browser.test.assertEq(
-          lang.percentage,
-          result.languages[index].percentage,
-          `element ${index} of result.languages array has the expected percentage in ${source}`);
-        browser.test.assertEq(
-          lang.language,
-          result.languages[index].language,
-          `element ${index} of result.languages array has the expected language in ${source}`);
-      });
-    }
-
-    let tabId;
-
-    browser.tabs.query({currentWindow: true, active: true}, tabs => {
-      tabId = tabs[0].id;
-      browser.test.sendMessage("ready");
-    });
-
-    browser.test.onMessage.addListener(async ([msg, expected]) => {
-      let backgroundResults = await browser.i18n.detectLanguage(msg);
-      let contentResults = await browser.tabs.sendMessage(tabId, msg);
-
-      checkResult("background", backgroundResults, expected);
-      checkResult("contentScript", contentResults, expected);
-
-      browser.test.sendMessage("done");
-    });
-  }
-
-  function content() {
-    browser.runtime.onMessage.addListener((msg, sender, respond) => {
-      browser.i18n.detectLanguage(msg, respond);
-      return true;
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "run_at": "document_start",
-        "js": ["content_script.js"],
-      }],
-    },
-
-    background,
-
-    files: {
-      "content_script.js": content,
-    },
-  });
-
-  let win = window.open("file_sample.html");
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  let expected = {
-    isReliable: true,
-    languages: [
-      {
-        language: "fr",
-        percentage: 67,
-      },
-      {
-        language: "en",
-        percentage: 32,
-      },
-    ],
-  };
-  extension.sendMessage([fr_en_string, expected]);
-  yield extension.awaitMessage("done");
-
-  expected = {
-    isReliable: true,
-    languages: [
-      {
-        language: "af",
-        percentage: 99,
-      },
-    ],
-  };
-  extension.sendMessage([af_string, expected]);
-  yield extension.awaitMessage("done");
-
-  win.close();
-
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_i18n_css.html b/toolkit/components/webextensions/test/mochitest/test_ext_i18n_css.html
deleted file mode 100644
index 7c6a8eeaa..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_i18n_css.html
+++ /dev/null
@@ -1,116 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_i18n_css() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background: function() {
-      function backgroundFetch(url) {
-        return new Promise((resolve, reject) => {
-          let xhr = new XMLHttpRequest();
-          xhr.open("GET", url);
-          xhr.onload = () => { resolve(xhr.responseText); };
-          xhr.onerror = reject;
-          xhr.send();
-        });
-      }
-
-      Promise.all([backgroundFetch("foo.css"), backgroundFetch("bar.CsS?x#y"), backgroundFetch("foo.txt")]).then(results => {
-        browser.test.assertEq("body { max-width: 42px; }", results[0], "CSS file localized");
-        browser.test.assertEq("body { max-width: 42px; }", results[1], "CSS file localized");
-
-        browser.test.assertEq("body { __MSG_foo__; }", results[2], "Text file not localized");
-
-        browser.test.notifyPass("i18n-css");
-      });
-
-      browser.test.sendMessage("ready", browser.runtime.getURL("foo.css"));
-    },
-
-    manifest: {
-      "web_accessible_resources": ["foo.css", "foo.txt", "locale.css"],
-
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "css": ["foo.css"],
-      }],
-
-      "default_locale": "en",
-    },
-
-    files: {
-      "_locales/en/messages.json": JSON.stringify({
-        "foo": {
-          "message": "max-width: 42px",
-          "description": "foo",
-        },
-      }),
-
-      "foo.css": "body { __MSG_foo__; }",
-      "bar.CsS": "body { __MSG_foo__; }",
-      "foo.txt": "body { __MSG_foo__; }",
-      "locale.css": '* { content: "__MSG_@@ui_locale__ __MSG_@@bidi_dir__ __MSG_@@bidi_reversed_dir__ __MSG_@@bidi_start_edge__ __MSG_@@bidi_end_edge__" }',
-    },
-  });
-
-  yield extension.startup();
-  let cssURL = yield extension.awaitMessage("ready");
-
-  function fetch(url) {
-    return new Promise((resolve, reject) => {
-      let xhr = new XMLHttpRequest();
-      xhr.open("GET", url);
-      xhr.onload = () => { resolve(xhr.responseText); };
-      xhr.onerror = reject;
-      xhr.send();
-    });
-  }
-
-  let css = yield fetch(cssURL);
-
-  is(css, "body { max-width: 42px; }", "CSS file localized in mochitest scope");
-
-  let win = window.open("file_sample.html");
-  yield waitForLoad(win);
-
-  let style = win.getComputedStyle(win.document.body);
-  is(style.maxWidth, "42px", "stylesheet correctly applied");
-  win.close();
-
-  cssURL = cssURL.replace(/foo.css$/, "locale.css");
-
-  css = yield fetch(cssURL);
-  is(css, '* { content: "en_US ltr rtl left right" }', "CSS file localized in mochitest scope");
-
-  const LOCALE = "general.useragent.locale";
-  const DIR = "intl.uidirection.en";
-
-  // We don't wind up actually switching the chrome registry locale, since we
-  // don't have a chrome package for Hebrew. So just override it.
-  SpecialPowers.setCharPref(LOCALE, "he");
-  SpecialPowers.setCharPref(DIR, "rtl");
-
-  css = yield fetch(cssURL);
-  is(css, '* { content: "he rtl ltr right left" }', "CSS file localized in mochitest scope");
-
-  SpecialPowers.clearUserPref(LOCALE);
-  SpecialPowers.clearUserPref(DIR);
-
-  yield extension.awaitFinish("i18n-css");
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_inIncognitoContext_window.html b/toolkit/components/webextensions/test/mochitest/test_ext_inIncognitoContext_window.html
deleted file mode 100644
index 675cbb298..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_inIncognitoContext_window.html
+++ /dev/null
@@ -1,49 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_in_incognito_context_true() {
-  function background() {
-    browser.runtime.onMessage.addListener(msg => {
-      browser.test.assertEq(true, msg, "inIncognitoContext is true");
-      browser.test.notifyPass("inIncognitoContext");
-    });
-
-    browser.windows.create({url: browser.runtime.getURL("/tab.html"), incognito: true});
-  }
-
-  function tabScript() {
-    browser.runtime.sendMessage(browser.extension.inIncognitoContext);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    files: {
-      "tab.js": tabScript,
-      "tab.html": `<!DOCTYPE html><html><head>
-        <meta charset="utf-8">
-        <script src="tab.js"><\/script>
-      </head></html>`,
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("inIncognitoContext");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_jsversion.html b/toolkit/components/webextensions/test/mochitest/test_ext_jsversion.html
deleted file mode 100644
index da0c355e0..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_jsversion.html
+++ /dev/null
@@ -1,86 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <meta charset="utf-8">
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_versioned_js() {
-  // We need to deal with escaping the close script tags.
-  // May as well consolidate it into one place.
-  let script = attrs => `<script ${attrs}><\/script>`;
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "background": {"page": "background.html"},
-    },
-
-    files: {
-      "background.html": `
-        <meta charset="utf-8">
-        ${script('src="background.js" type="application/javascript"')}
-        ${script('src="background-1.js" type="application/javascript;version=1.8"')}
-        ${script('src="background-2.js" type="application/javascript;version=latest"')}
-        ${script('src="background-3.js" type="application/javascript"')}
-      `,
-
-      "background.js": function() {
-        window.reportResult = msg => {
-          browser.test.assertEq(
-            msg, "background-script-3",
-            "Expected a message only from the unversioned background script.");
-
-          browser.test.sendMessage("finished");
-        };
-      },
-
-      "background-1.js": function() {
-        window.reportResult("background-script-1");
-      },
-      "background-2.js": function() {
-        window.reportResult("background-script-2");
-      },
-      "background-3.js": function() {
-        window.reportResult("background-script-3");
-      },
-    },
-  });
-
-  let messages = [/Versioned JavaScript.*not supported in WebExtension.*developer\.mozilla\.org/,
-                  /Versioned JavaScript.*not supported in WebExtension.*developer\.mozilla\.org/];
-
-  let waitForConsole = new Promise(resolve => {
-    SimpleTest.monitorConsole(resolve, messages);
-  });
-
-  info("loading extension");
-
-  yield Promise.all([extension.startup(),
-                     extension.awaitMessage("finished")]);
-
-  info("waiting for console");
-
-  SimpleTest.endMonitorConsole();
-  yield waitForConsole;
-
-  info("unloading extension");
-
-  yield extension.unload();
-
-  info("test complete");
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_listener_proxies.html b/toolkit/components/webextensions/test/mochitest/test_ext_listener_proxies.html
deleted file mode 100644
index ca8db873e..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_listener_proxies.html
+++ /dev/null
@@ -1,63 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_listener_proxies() {
-  let extension = ExtensionTestUtils.loadExtension({
-    useAddonManager: "temporary",
-
-    manifest: {
-      "permissions": ["storage"],
-    },
-
-    async background() {
-      // Test that adding multiple listeners for the same event works as
-      // expected.
-
-      let awaitChanged = () => new Promise(resolve => {
-        browser.storage.onChanged.addListener(function listener() {
-          browser.storage.onChanged.removeListener(listener);
-          resolve();
-        });
-      });
-
-      let promises = [
-        awaitChanged(),
-        awaitChanged(),
-      ];
-
-      function removedListener() {}
-      browser.storage.onChanged.addListener(removedListener);
-      browser.storage.onChanged.removeListener(removedListener);
-
-      promises.push(awaitChanged(), awaitChanged());
-
-      browser.storage.local.set({foo: "bar"});
-
-      await Promise.all(promises);
-
-      browser.test.notifyPass("onchanged-listeners");
-    },
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("onchanged-listeners");
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_notifications.html b/toolkit/components/webextensions/test/mochitest/test_ext_notifications.html
deleted file mode 100644
index d1b798cf9..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_notifications.html
+++ /dev/null
@@ -1,224 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for notifications</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-// A 1x1 PNG image.
-// Source: https://commons.wikimedia.org/wiki/File:1x1.png (Public Domain)
-let image = atob("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAA" +
-                 "ACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=");
-const IMAGE_ARRAYBUFFER = Uint8Array.from(image, byte => byte.charCodeAt(0)).buffer;
-
-add_task(function* test_notification() {
-  async function background() {
-    let opts = {
-      type: "basic",
-      title: "Testing Notification",
-      message: "Carry on",
-    };
-
-    let id = await browser.notifications.create(opts);
-
-    browser.test.sendMessage("running", id);
-    browser.test.notifyPass("background test passed");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["notifications"],
-    },
-    background,
-  });
-  yield extension.startup();
-  let x = yield extension.awaitMessage("running");
-  is(x, "0", "got correct id from notifications.create");
-  yield extension.awaitFinish();
-  yield extension.unload();
-});
-
-add_task(function* test_notification_events() {
-  async function background() {
-    let opts = {
-      type: "basic",
-      title: "Testing Notification",
-      message: "Carry on",
-    };
-
-    // Test an ignored listener.
-    browser.notifications.onButtonClicked.addListener(function() {});
-
-    // We cannot test onClicked listener without a mock
-    // but we can attempt to add a listener.
-    browser.notifications.onClicked.addListener(function() {});
-
-    // Test onClosed listener.
-    browser.notifications.onClosed.addListener(id => {
-      browser.test.sendMessage("closed", id);
-      browser.test.notifyPass("background test passed");
-    });
-
-    await browser.notifications.create("5", opts);
-    let id = await browser.notifications.create("5", opts);
-    browser.test.sendMessage("running", id);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["notifications"],
-    },
-    background,
-  });
-  yield extension.startup();
-  let x = yield extension.awaitMessage("closed");
-  is(x, "5", "got correct id from onClosed listener");
-  x = yield extension.awaitMessage("running");
-  is(x, "5", "got correct id from notifications.create");
-  yield extension.awaitFinish();
-  yield extension.unload();
-});
-
-add_task(function* test_notification_clear() {
-  async function background() {
-    let opts = {
-      type: "basic",
-      title: "Testing Notification",
-      message: "Carry on",
-    };
-
-    browser.notifications.onClosed.addListener(id => {
-      browser.test.sendMessage("closed", id);
-    });
-
-    let id = await browser.notifications.create("99", opts);
-
-    let wasCleared = await browser.notifications.clear(id);
-    browser.test.sendMessage("cleared", wasCleared);
-
-    browser.test.notifyPass("background test passed");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["notifications"],
-    },
-    background,
-  });
-  yield extension.startup();
-  let x = yield extension.awaitMessage("closed");
-  is(x, "99", "got correct id from onClosed listener");
-  x = yield extension.awaitMessage("cleared");
-  is(x, true, "got correct boolean from notifications.clear");
-  yield extension.awaitFinish();
-  yield extension.unload();
-});
-
-add_task(function* test_notifications_empty_getAll() {
-  async function background() {
-    let notifications = await browser.notifications.getAll();
-
-    browser.test.assertEq("object", typeof notifications, "getAll() returned an object");
-    browser.test.assertEq(0, Object.keys(notifications).length, "the object has no properties");
-    browser.test.notifyPass("getAll empty");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["notifications"],
-    },
-    background,
-  });
-  yield extension.startup();
-  yield extension.awaitFinish("getAll empty");
-  yield extension.unload();
-});
-
-add_task(function* test_notifications_populated_getAll() {
-  async function background() {
-    let opts = {
-      type: "basic",
-      iconUrl: "a.png",
-      title: "Testing Notification",
-      message: "Carry on",
-    };
-
-    await browser.notifications.create("p1", opts);
-    await browser.notifications.create("p2", opts);
-    let notifications = await browser.notifications.getAll();
-
-    browser.test.assertEq("object", typeof notifications, "getAll() returned an object");
-    browser.test.assertEq(2, Object.keys(notifications).length, "the object has 2 properties");
-
-    for (let notificationId of ["p1", "p2"]) {
-      for (let key of Object.keys(opts)) {
-        browser.test.assertEq(
-          opts[key],
-          notifications[notificationId][key],
-          `the notification has the expected value for option: ${key}`
-        );
-      }
-    }
-
-    browser.test.notifyPass("getAll populated");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["notifications"],
-    },
-    background,
-    files: {
-      "a.png": IMAGE_ARRAYBUFFER,
-    },
-  });
-  yield extension.startup();
-  yield extension.awaitFinish("getAll populated");
-  yield extension.unload();
-});
-
-add_task(function* test_buttons_unsupported() {
-  function background() {
-    let opts = {
-      type: "basic",
-      title: "Testing Notification",
-      message: "Carry on",
-      buttons: [{title: "Button title"}],
-    };
-
-    let exception = {};
-    try {
-      browser.notifications.create(opts);
-    } catch (e) {
-      exception = e;
-    }
-
-    browser.test.assertTrue(
-      String(exception).includes('Property "buttons" is unsupported by Firefox'),
-      "notifications.create with buttons option threw an expected exception"
-    );
-    browser.test.notifyPass("buttons-unsupported");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["notifications"],
-    },
-    background,
-  });
-  yield extension.startup();
-  yield extension.awaitFinish("buttons-unsupported");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_permission_xhr.html b/toolkit/components/webextensions/test/mochitest/test_ext_permission_xhr.html
deleted file mode 100644
index 07967d5d0..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_permission_xhr.html
+++ /dev/null
@@ -1,119 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension Test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/* eslint-disable mozilla/balanced-listeners */
-
-add_task(function* test_simple() {
-  async function runTests(cx) {
-    function xhr(XMLHttpRequest) {
-      return (url) => {
-        return new Promise((resolve, reject) => {
-          let req = new XMLHttpRequest();
-          req.open("GET", url);
-          req.addEventListener("load", resolve);
-          req.addEventListener("error", reject);
-          req.send();
-        });
-      };
-    }
-
-    function run(shouldFail, fetch) {
-      function passListener() {
-        browser.test.succeed(`${cx}.${fetch.name} pass listener`);
-      }
-
-      function failListener() {
-        browser.test.fail(`${cx}.${fetch.name} fail listener`);
-      }
-
-      /* eslint-disable no-else-return */
-      if (shouldFail) {
-        return fetch("http://example.org/example.txt").then(failListener, passListener);
-      } else {
-        return fetch("http://example.com/example.txt").then(passListener, failListener);
-      }
-      /* eslint-enable no-else-return */
-    }
-
-    try {
-      await run(true, xhr(XMLHttpRequest));
-      await run(false, xhr(XMLHttpRequest));
-      await run(true, xhr(window.XMLHttpRequest));
-      await run(false, xhr(window.XMLHttpRequest));
-      await run(true, fetch);
-      await run(false, fetch);
-      await run(true, window.fetch);
-      await run(false, window.fetch);
-    } catch (err) {
-      browser.test.fail(`Error: ${err} :: ${err.stack}`);
-      browser.test.notifyFail("permission_xhr");
-    }
-  }
-
-  async function background(runTestsFn) {
-    await runTestsFn("bg");
-    browser.test.notifyPass("permission_xhr");
-  }
-
-  let extensionData = {
-    background: `(${background})(${runTests})`,
-    manifest: {
-      permissions: ["http://example.com/"],
-      content_scripts: [{
-        "matches": ["http://mochi.test/*/file_permission_xhr.html"],
-        "js": ["content.js"],
-      }],
-    },
-    files: {
-      "content.js": `(${async runTestsFn => {
-        await runTestsFn("content");
-
-        window.wrappedJSObject.privilegedFetch = fetch;
-        window.wrappedJSObject.privilegedXHR = XMLHttpRequest;
-
-        window.addEventListener("message", function rcv({data}) {
-          switch (data.msg) {
-            case "test":
-              break;
-
-            case "assertTrue":
-              browser.test.assertTrue(data.condition, data.description);
-              break;
-
-            case "finish":
-              window.removeEventListener("message", rcv, false);
-              browser.test.sendMessage("content-script-finished");
-              break;
-          }
-        }, false);
-        window.postMessage("test", "*");
-      }})(${runTests})`,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_permission_xhr.html");
-  yield extension.awaitMessage("content-script-finished");
-  win.close();
-
-  yield extension.awaitFinish("permission_xhr");
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect.html b/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect.html
deleted file mode 100644
index 60351eaee..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect.html
+++ /dev/null
@@ -1,83 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  browser.runtime.onConnect.addListener(port => {
-    browser.test.assertEq(port.name, "ernie", "port name correct");
-    browser.test.assertTrue(port.sender.url.endsWith("file_sample.html"), "URL correct");
-    browser.test.assertTrue(port.sender.tab.url.endsWith("file_sample.html"), "tab URL correct");
-
-    let expected = "message 1";
-    port.onMessage.addListener(msg => {
-      browser.test.assertEq(msg, expected, "message is expected");
-      if (expected == "message 1") {
-        port.postMessage("message 2");
-        expected = "message 3";
-      } else if (expected == "message 3") {
-        expected = "disconnect";
-        browser.test.notifyPass("runtime.connect");
-      }
-    });
-    port.onDisconnect.addListener(() => {
-      browser.test.assertEq(null, port.error, "No error because port is closed by disconnect() at other end");
-      browser.test.assertEq(expected, "disconnect", "got disconnection at right time");
-    });
-  });
-}
-
-function contentScript() {
-  let port = browser.runtime.connect({name: "ernie"});
-  port.postMessage("message 1");
-  port.onMessage.addListener(msg => {
-    if (msg == "message 2") {
-      port.postMessage("message 3");
-      port.disconnect();
-    }
-  });
-}
-
-let extensionData = {
-  background,
-  manifest: {
-    "permissions": ["tabs"],
-    "content_scripts": [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_start",
-    }],
-  },
-
-  files: {
-    "content_script.js": contentScript,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), extension.awaitFinish("runtime.connect")]);
-
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect2.html b/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect2.html
deleted file mode 100644
index dce12b21b..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect2.html
+++ /dev/null
@@ -1,103 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function backgroundScript(token) {
-  browser.runtime.onMessage.addListener(msg => {
-    browser.test.assertEq(msg, "done");
-    browser.test.notifyPass("sendmessage_reply");
-  });
-
-  browser.runtime.onConnect.addListener(port => {
-    browser.test.assertTrue(port.sender.url.endsWith("file_sample.html"), "sender url correct");
-    browser.test.assertTrue(port.sender.tab.url.endsWith("file_sample.html"), "sender url correct");
-
-    let tabId = port.sender.tab.id;
-    browser.tabs.connect(tabId, {name: token});
-
-    browser.test.assertEq(port.name, token, "token matches");
-    port.postMessage(token + "-done");
-  });
-
-  browser.test.sendMessage("background-ready");
-}
-
-function contentScript(token) {
-  let gotTabMessage = false;
-  let badTabMessage = false;
-  browser.runtime.onConnect.addListener(port => {
-    if (port.name == token) {
-      gotTabMessage = true;
-    } else {
-      badTabMessage = true;
-    }
-    port.disconnect();
-  });
-
-  let port = browser.runtime.connect(null, {name: token});
-  port.onMessage.addListener(function(msg) {
-    if (msg != token + "-done" || !gotTabMessage || badTabMessage) {
-      return; // test failed
-    }
-
-    // FIXME: Removing this line causes the test to fail:
-    // resource://gre/modules/ExtensionUtils.jsm, line 651: NS_ERROR_NOT_INITIALIZED
-    port.disconnect();
-    browser.runtime.sendMessage("done");
-  });
-}
-
-function makeExtension() {
-  let token = Math.random();
-  let extensionData = {
-    background: `(${backgroundScript})("${token}")`,
-    manifest: {
-      "permissions": ["tabs"],
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "js": ["content_script.js"],
-        "run_at": "document_idle",
-      }],
-    },
-
-    files: {
-      "content_script.js": `(${contentScript})("${token}")`,
-    },
-  };
-  return extensionData;
-}
-
-add_task(function* test_contentscript() {
-  let extension1 = ExtensionTestUtils.loadExtension(makeExtension());
-  let extension2 = ExtensionTestUtils.loadExtension(makeExtension());
-  yield Promise.all([extension1.startup(), extension2.startup()]);
-
-  yield extension1.awaitMessage("background-ready");
-  yield extension2.awaitMessage("background-ready");
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win),
-                     extension1.awaitFinish("sendmessage_reply"),
-                     extension2.awaitFinish("sendmessage_reply")]);
-
-  win.close();
-
-  yield extension1.unload();
-  yield extension2.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect_twoway.html b/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect_twoway.html
deleted file mode 100644
index e84134eff..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_connect_twoway.html
+++ /dev/null
@@ -1,127 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-add_task(function* test_connect_bidirectionally_and_postMessage() {
-  function background() {
-    let onConnectCount = 0;
-    browser.runtime.onConnect.addListener(port => {
-      // 3. onConnect by connect() from CS.
-      browser.test.assertEq("from-cs", port.name);
-      browser.test.assertEq(1, ++onConnectCount,
-          "BG onConnect should be called once");
-
-      let tabId = port.sender.tab.id;
-      browser.test.assertTrue(tabId, "content script must have a tab ID");
-
-      let port2;
-      let postMessageCount1 = 0;
-      port.onMessage.addListener(msg => {
-        // 11. port.onMessage by port.postMessage in CS.
-        browser.test.assertEq("from CS to port", msg);
-        browser.test.assertEq(1, ++postMessageCount1,
-          "BG port.onMessage should be called once");
-
-        // 12. should trigger port2.onMessage in CS.
-        port2.postMessage("from BG to port2");
-      });
-
-      // 4. Should trigger onConnect in CS.
-      port2 = browser.tabs.connect(tabId, {name: "from-bg"});
-      let postMessageCount2 = 0;
-      port2.onMessage.addListener(msg => {
-        // 7. onMessage by port2.postMessage in CS.
-        browser.test.assertEq("from CS to port2", msg);
-        browser.test.assertEq(1, ++postMessageCount2,
-          "BG port2.onMessage should be called once");
-
-        // 8. Should trigger port.onMessage in CS.
-        port.postMessage("from BG to port");
-      });
-    });
-
-    // 1. Notify test runner to create a new tab.
-    browser.test.sendMessage("ready");
-  }
-
-  function contentScript() {
-    let onConnectCount = 0;
-    let port;
-    browser.runtime.onConnect.addListener(port2 => {
-      // 5. onConnect by connect() from BG.
-      browser.test.assertEq("from-bg", port2.name);
-      browser.test.assertEq(1, ++onConnectCount,
-        "CS onConnect should be called once");
-
-      let postMessageCount2 = 0;
-      port2.onMessage.addListener(msg => {
-        // 12. port2.onMessage by port2.postMessage in BG.
-        browser.test.assertEq("from BG to port2", msg);
-        browser.test.assertEq(1, ++postMessageCount2,
-          "CS port2.onMessage should be called once");
-
-        // TODO(robwu): Do not explicitly disconnect, it should not be a problem
-        // if we keep the ports open. However, not closing the ports causes the
-        // test to fail with NS_ERROR_NOT_INITIALIZED in ExtensionUtils.jsm, in
-        // Port.prototype.disconnect (nsIMessageSender.sendAsyncMessage).
-        port.disconnect();
-        port2.disconnect();
-        browser.test.notifyPass("ping pong done");
-      });
-      // 6. should trigger port2.onMessage in BG.
-      port2.postMessage("from CS to port2");
-    });
-
-    // 2. should trigger onConnect in BG.
-    port = browser.runtime.connect({name: "from-cs"});
-    let postMessageCount1 = 0;
-    port.onMessage.addListener(msg => {
-      // 9. onMessage by port.postMessage in BG.
-      browser.test.assertEq("from BG to port", msg);
-      browser.test.assertEq(1, ++postMessageCount1,
-        "CS port.onMessage should be called once");
-
-      // 10. should trigger port.onMessage in BG.
-      port.postMessage("from CS to port");
-    });
-  }
-
-  let extensionData = {
-    background,
-    manifest: {
-      content_scripts: [{
-        js: ["contentscript.js"],
-        matches: ["http://mochi.test/*/file_sample.html"],
-      }],
-    },
-    files: {
-      "contentscript.js": contentScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  info("extension loaded");
-
-  yield extension.awaitMessage("ready");
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitFinish("ping pong done");
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-</body>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_disconnect.html b/toolkit/components/webextensions/test/mochitest/test_ext_runtime_disconnect.html
deleted file mode 100644
index 5764d0a3c..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_disconnect.html
+++ /dev/null
@@ -1,78 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  browser.runtime.onConnect.addListener(port => {
-    browser.test.assertEq(port.name, "ernie", "port name correct");
-    port.onDisconnect.addListener(() => {
-      browser.test.assertEq(null, port.error, "The port is implicitly closed without errors when the other context unloads");
-      // Closing an already-disconnected port is a no-op.
-      port.disconnect();
-      port.disconnect();
-      browser.test.sendMessage("disconnected");
-    });
-    browser.test.sendMessage("connected");
-  });
-}
-
-function contentScript() {
-  browser.runtime.connect({name: "ernie"});
-}
-
-let extensionData = {
-  background,
-  manifest: {
-    "permissions": ["tabs"],
-    "content_scripts": [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_idle",
-    }],
-  },
-
-  files: {
-    "content_script.js": contentScript,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield Promise.all([waitForLoad(win), extension.awaitMessage("connected")]);
-  win.close();
-  yield extension.awaitMessage("disconnected");
-
-  info("win.close() succeeded");
-
-  win = window.open("file_sample.html");
-  yield Promise.all([waitForLoad(win), extension.awaitMessage("connected")]);
-
-  // Add an "unload" listener so that we don't put the window in the
-  // bfcache. This way it gets destroyed immediately upon navigation.
-  win.addEventListener("unload", function() {});  // eslint-disable-line mozilla/balanced-listeners
-
-  win.location = "http://example.com";
-  yield extension.awaitMessage("disconnected");
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_id.html b/toolkit/components/webextensions/test/mochitest/test_ext_runtime_id.html
deleted file mode 100644
index 4cdefda41..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_runtime_id.html
+++ /dev/null
@@ -1,61 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset="utf-8">
-  <title>Test for browser.runtime.id</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_runtime_id() {
-  function background() {
-    browser.test.sendMessage("background-id", browser.runtime.id);
-  }
-
-  function content() {
-    browser.test.sendMessage("content-id", browser.runtime.id);
-  }
-
-  let uuidGenerator = SpecialPowers.Cc["@mozilla.org/uuid-generator;1"].getService(SpecialPowers.Ci.nsIUUIDGenerator);
-  let id = uuidGenerator.generateUUID().number;
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      applications: {gecko: {id}},
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "run_at": "document_start",
-        "js": ["content_script.js"],
-      }],
-    },
-
-    background,
-
-    files: {
-      "content_script.js": content,
-    },
-  });
-
-  yield extension.startup();
-
-  let backgroundId = yield extension.awaitMessage("background-id");
-  is(backgroundId, id, "runtime.id from background script is correct");
-  let win = window.open("file_sample.html");
-  let contentId = yield extension.awaitMessage("content-id");
-  is(contentId, id, "runtime.id from content script is correct");
-
-  win.close();
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_sandbox_var.html b/toolkit/components/webextensions/test/mochitest/test_ext_sandbox_var.html
deleted file mode 100644
index 426a71ac6..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_sandbox_var.html
+++ /dev/null
@@ -1,60 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  browser.runtime.onMessage.addListener(result => {
-    browser.test.assertEq(result, 12, "x is 12");
-    browser.test.notifyPass("background test passed");
-  });
-}
-
-function contentScript() {
-  window.x = 12;
-  browser.runtime.onMessage.addListener(function() {});
-  browser.runtime.sendMessage(window.x);
-}
-
-let extensionData = {
-  background,
-  manifest: {
-    "content_scripts": [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_idle",
-    }],
-  },
-
-  files: {
-    "content_script.js": contentScript,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), extension.awaitFinish()]);
-
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_schema.html b/toolkit/components/webextensions/test/mochitest/test_ext_schema.html
deleted file mode 100644
index 8a0e11c56..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_schema.html
+++ /dev/null
@@ -1,73 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for schema API creation</title>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="chrome_head.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* testEmptySchema() {
-  function background() {
-    browser.test.assertEq(undefined, browser.manifest, "browser.manifest is not defined");
-    browser.test.assertTrue("storage" in browser, "browser.storage should be defined");
-    browser.test.assertEq(undefined, browser.contextMenus, "browser.contextMenus should not be defined");
-    browser.test.notifyPass("schema");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["storage"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("schema");
-  yield extension.unload();
-});
-
-add_task(function* testUnknownProperties() {
-  function background() {
-    browser.test.notifyPass("loaded");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["unknownPermission"],
-
-      unknown_property: {},
-    },
-
-    background,
-  });
-
-  let messages = [
-    {message: /processing permissions\.0: Unknown permission "unknownPermission"/},
-    {message: /processing unknown_property: An unexpected property was found in the WebExtension manifest/},
-  ];
-
-  let waitForConsole = new Promise(resolve => {
-    SimpleTest.monitorConsole(resolve, messages);
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("loaded");
-
-  yield extension.unload();
-
-  SimpleTest.endMonitorConsole();
-  yield waitForConsole;
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_doublereply.html b/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_doublereply.html
deleted file mode 100644
index a3ef37cad..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_doublereply.html
+++ /dev/null
@@ -1,101 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  // Add two listeners that both send replies. We're supposed to ignore all but one
-  // of them. Which one is chosen is non-deterministic.
-
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"), "sender url correct");
-
-    if (msg == "getreply") {
-      sendReply("reply1");
-    }
-  });
-
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"), "sender url correct");
-
-    if (msg == "getreply") {
-      sendReply("reply2");
-    }
-  });
-
-  function sleep(callback, n = 10) {
-    if (n == 0) {
-      callback();
-    } else {
-      setTimeout(function() { sleep(callback, n - 1); }, 0);
-    }
-  }
-
-  let done_count = 0;
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"), "sender url correct");
-
-    if (msg == "done") {
-      done_count++;
-      browser.test.assertEq(done_count, 1, "got exactly one reply");
-
-      // Go through the event loop a few times to make sure we don't get multiple replies.
-      sleep(function() {
-        browser.test.notifyPass("sendmessage_doublereply");
-      });
-    }
-  });
-}
-
-function contentScript() {
-  browser.runtime.sendMessage("getreply", function(resp) {
-    if (resp != "reply1" && resp != "reply2") {
-      return; // test failed
-    }
-    browser.runtime.sendMessage("done");
-  });
-}
-
-let extensionData = {
-  background,
-  manifest: {
-    "permissions": ["tabs"],
-    "content_scripts": [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_start",
-    }],
-  },
-
-  files: {
-    "content_script.js": contentScript,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), extension.awaitFinish("sendmessage_doublereply")]);
-
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_no_receiver.html b/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_no_receiver.html
deleted file mode 100644
index 96af6558e..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_no_receiver.html
+++ /dev/null
@@ -1,83 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <meta charset="utf-8">
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-<script>
-"use strict";
-
-function loadContentScriptExtension(contentScript) {
-  let extensionData = {
-    manifest: {
-      "content_scripts": [{
-        "js": ["contentscript.js"],
-        "matches": ["http://mochi.test/*/file_sample.html"],
-      }],
-    },
-    files: {
-      "contentscript.js": contentScript,
-    },
-  };
-  return ExtensionTestUtils.loadExtension(extensionData);
-}
-
-add_task(function* test_content_script_sendMessage_without_listener() {
-  async function contentScript() {
-    await browser.test.assertRejects(
-      browser.runtime.sendMessage("msg"),
-      "Could not establish connection. Receiving end does not exist.");
-
-    browser.test.notifyPass("sendMessage callback was invoked");
-  }
-
-  let extension = loadContentScriptExtension(contentScript);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitFinish("sendMessage callback was invoked");
-  win.close();
-
-  yield extension.unload();
-});
-
-add_task(function* test_content_script_chrome_sendMessage_without_listener() {
-  function contentScript() {
-    /* globals chrome */
-    browser.test.assertEq(null, chrome.runtime.lastError, "no lastError before call");
-    let retval = chrome.runtime.sendMessage("msg");
-    browser.test.assertEq(null, chrome.runtime.lastError, "no lastError after call");
-    // TODO(robwu): Fix the implementation and uncomment the next expectation.
-    // When content script APIs are schema-based (bugzil.la/1287007) this bug will be fixed for free.
-    // browser.test.assertEq(undefined, retval, "return value of chrome.runtime.sendMessage without callback");
-    browser.test.assertTrue(retval instanceof Promise, "TODO: chrome.runtime.sendMessage should return undefined, not a promise");
-
-    let isAsyncCall = false;
-    retval = chrome.runtime.sendMessage("msg", reply => {
-      browser.test.assertEq(undefined, reply, "no reply");
-      browser.test.assertTrue(isAsyncCall, "chrome.runtime.sendMessage's callback must be called asynchronously");
-      browser.test.assertEq(undefined, retval, "return value of chrome.runtime.sendMessage with callback");
-      browser.test.assertEq("Could not establish connection. Receiving end does not exist.", chrome.runtime.lastError.message);
-      browser.test.notifyPass("finished chrome.runtime.sendMessage");
-    });
-    isAsyncCall = true;
-  }
-
-  let extension = loadContentScriptExtension(contentScript);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-  yield extension.awaitFinish("finished chrome.runtime.sendMessage");
-  win.close();
-
-  yield extension.unload();
-});
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply.html b/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply.html
deleted file mode 100644
index a4ac708b2..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply.html
+++ /dev/null
@@ -1,79 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function background() {
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"), "sender url correct");
-
-    if (msg == 0) {
-      sendReply("reply1");
-    } else if (msg == 1) {
-      window.setTimeout(function() {
-        sendReply("reply2");
-      }, 0);
-      return true;
-    } else if (msg == 2) {
-      browser.test.notifyPass("sendmessage_reply");
-    }
-  });
-}
-
-function contentScript() {
-  browser.runtime.sendMessage(0, function(resp1) {
-    if (resp1 != "reply1") {
-      return; // test failed
-    }
-    browser.runtime.sendMessage(1, function(resp2) {
-      if (resp2 != "reply2") {
-        return; // test failed
-      }
-      browser.runtime.sendMessage(2);
-    });
-  });
-}
-
-let extensionData = {
-  background,
-  manifest: {
-    "permissions": ["tabs"],
-    "content_scripts": [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_idle",
-    }],
-  },
-
-  files: {
-    "content_script.js": contentScript,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let win = window.open("file_sample.html");
-
-  yield Promise.all([waitForLoad(win), extension.awaitFinish("sendmessage_reply")]);
-
-  win.close();
-
-  yield extension.unload();
-  info("extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html b/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html
deleted file mode 100644
index 5c350be2f..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html
+++ /dev/null
@@ -1,181 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-function backgroundScript(token, id, otherId) {
-  browser.tabs.create({url: "tab.html"});
-
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertEq(id, sender.id, `${id}: Got expected sender ID`);
-
-    if (msg === `content-${token}`) {
-      browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"),
-                              `${id}: sender url correct`);
-
-      let tabId = sender.tab.id;
-      browser.tabs.sendMessage(tabId, `${token}-contentMessage`);
-
-      sendReply(`${token}-done`);
-    } else if (msg === `tab-${token}`) {
-      browser.runtime.sendMessage(otherId, `${otherId}-tabMessage`);
-      browser.runtime.sendMessage(`${token}-tabMessage`);
-
-      sendReply(`${token}-done`);
-    } else {
-      browser.test.fail(`${id}: Unexpected runtime message received: ${msg} ${uneval(sender)}`);
-    }
-  });
-
-  browser.runtime.onMessageExternal.addListener((msg, sender, sendReply) => {
-    browser.test.assertEq(otherId, sender.id, `${id}: Got expected external sender ID`);
-
-    if (msg === `content-${id}`) {
-      browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"),
-                              `${id}: external sender url correct`);
-
-      sendReply(`${otherId}-done`);
-    } else if (msg === `tab-${id}`) {
-      sendReply(`${otherId}-done`);
-    } else if (msg !== `${id}-tabMessage`) {
-      browser.test.fail(`${id}: Unexpected runtime external message received: ${msg} ${uneval(sender)}`);
-    }
-  });
-}
-
-function contentScript(token, id, otherId) {
-  let gotContentMessage = false;
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertEq(id, sender.id, `${id}: Got expected sender ID`);
-
-    browser.test.assertEq(`${token}-contentMessage`, msg,
-                          `${id}: Correct content script message`);
-    if (msg === `${token}-contentMessage`) {
-      gotContentMessage = true;
-    }
-  });
-
-  Promise.all([
-    browser.runtime.sendMessage(otherId, `content-${otherId}`).then(resp => {
-      browser.test.assertEq(`${id}-done`, resp, `${id}: Correct content script external response token`);
-    }),
-
-    browser.runtime.sendMessage(`content-${token}`).then(resp => {
-      browser.test.assertEq(`${token}-done`, resp, `${id}: Correct content script response token`);
-    }),
-  ]).then(() => {
-    browser.test.assertTrue(gotContentMessage, `${id}: Got content script message`);
-
-    browser.test.sendMessage("content-script-done");
-  });
-}
-
-function tabScript(token, id, otherId) {
-  let gotTabMessage = false;
-  browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertEq(id, sender.id, `${id}: Got expected sender ID`);
-
-    if (String(msg).startsWith("content-")) {
-      return;
-    }
-
-    browser.test.assertEq(`${token}-tabMessage`, msg,
-                          `${id}: Correct tab script message`);
-    if (msg === `${token}-tabMessage`) {
-      gotTabMessage = true;
-    }
-  });
-
-  Promise.all([
-    browser.runtime.sendMessage(otherId, `tab-${otherId}`).then(resp => {
-      browser.test.assertEq(`${id}-done`, resp, `${id}: Correct tab script external response token`);
-    }),
-
-    browser.runtime.sendMessage(`tab-${token}`).then(resp => {
-      browser.test.assertEq(`${token}-done`, resp, `${id}: Correct tab script response token`);
-    }),
-  ]).then(() => {
-    browser.test.assertTrue(gotTabMessage, `${id}: Got tab script message`);
-
-    window.close();
-
-    browser.test.sendMessage("tab-script-done");
-  });
-}
-
-function makeExtension(id, otherId) {
-  let token = Math.random();
-
-  let args = `${token}, ${JSON.stringify(id)}, ${JSON.stringify(otherId)}`;
-
-  let extensionData = {
-    background: `(${backgroundScript})(${args})`,
-    manifest: {
-      "applications": {"gecko": {id}},
-
-      "permissions": ["tabs"],
-
-
-      "content_scripts": [{
-        "matches": ["http://mochi.test/*/file_sample.html"],
-        "js": ["content_script.js"],
-        "run_at": "document_start",
-      }],
-    },
-
-    files: {
-      "tab.html": `<!DOCTYPE html>
-        <html>
-          <head>
-            <meta charset="utf-8">
-            <script src="tab.js"><\/script>
-          </head>
-        </html>`,
-
-      "tab.js": `(${tabScript})(${args})`,
-
-      "content_script.js": `(${contentScript})(${args})`,
-    },
-  };
-  return extensionData;
-}
-
-add_task(function* test_contentscript() {
-  const ID1 = "sendmessage1@mochitest.mozilla.org";
-  const ID2 = "sendmessage2@mochitest.mozilla.org";
-
-  let extension1 = ExtensionTestUtils.loadExtension(makeExtension(ID1, ID2));
-  let extension2 = ExtensionTestUtils.loadExtension(makeExtension(ID2, ID1));
-
-  yield Promise.all([extension1.startup(), extension2.startup()]);
-
-  let win = window.open("file_sample.html");
-
-  yield waitForLoad(win);
-
-  yield Promise.all([
-    extension1.awaitMessage("content-script-done"),
-    extension2.awaitMessage("content-script-done"),
-    extension1.awaitMessage("tab-script-done"),
-    extension2.awaitMessage("tab-script-done"),
-  ]);
-
-  win.close();
-
-  yield extension1.unload();
-  yield extension2.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_storage_content.html b/toolkit/components/webextensions/test/mochitest/test_ext_storage_content.html
deleted file mode 100644
index 09a33814a..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_storage_content.html
+++ /dev/null
@@ -1,330 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="application/javascript">
-"use strict";
-
-// Copied from toolkit/components/extensions/test/xpcshell/test_ext_storage.js.
-// The storage API in content scripts should behave identical to the storage API
-// in background pages.
-const STORAGE_SYNC_PREF = "webextensions.storage.sync.enabled";
-/**
- * Utility function to ensure that all supported APIs for getting are
- * tested.
- *
- * @param {string} areaName
- *        either "local" or "sync" according to what we want to test
- * @param {string} prop
- *        "key" to look up using the storage API
- * @param {Object} value
- *        "value" to compare against
- */
-async function checkGetImpl(areaName, prop, value) {
-  let storage = browser.storage[areaName];
-
-  let data = await storage.get(null);
-  browser.test.assertEq(value, data[prop], `null getter worked for ${prop} in ${areaName}`);
-
-  data = await storage.get(prop);
-  browser.test.assertEq(value, data[prop], `string getter worked for ${prop} in ${areaName}`);
-
-  data = await storage.get([prop]);
-  browser.test.assertEq(value, data[prop], `array getter worked for ${prop} in ${areaName}`);
-
-  data = await storage.get({[prop]: undefined});
-  browser.test.assertEq(value, data[prop], `object getter worked for ${prop} in ${areaName}`);
-}
-
-async function contentScript(checkGet) {
-  let globalChanges, gResolve;
-  function clearGlobalChanges() {
-    globalChanges = new Promise(resolve => { gResolve = resolve; });
-  }
-  clearGlobalChanges();
-  let expectedAreaName;
-
-  browser.storage.onChanged.addListener((changes, areaName) => {
-    browser.test.assertEq(expectedAreaName, areaName,
-      "Expected area name received by listener");
-    gResolve(changes);
-  });
-
-  async function checkChanges(areaName, changes, message) {
-    function checkSub(obj1, obj2) {
-      for (let prop in obj1) {
-        browser.test.assertTrue(obj1[prop] !== undefined,
-                                `checkChanges ${areaName} ${prop} is missing (${message})`);
-        browser.test.assertTrue(obj2[prop] !== undefined,
-                                `checkChanges ${areaName} ${prop} is missing (${message})`);
-        browser.test.assertEq(obj1[prop].oldValue, obj2[prop].oldValue,
-                              `checkChanges ${areaName} ${prop} old (${message})`);
-        browser.test.assertEq(obj1[prop].newValue, obj2[prop].newValue,
-                              `checkChanges ${areaName} ${prop} new (${message})`);
-      }
-    }
-
-    const recentChanges = await globalChanges;
-    checkSub(changes, recentChanges);
-    checkSub(recentChanges, changes);
-    clearGlobalChanges();
-  }
-
-  /* eslint-disable dot-notation */
-  async function runTests(areaName) {
-    expectedAreaName = areaName;
-    let storage = browser.storage[areaName];
-    // Set some data and then test getters.
-    try {
-      await storage.set({"test-prop1": "value1", "test-prop2": "value2"});
-      await checkChanges(areaName,
-        {"test-prop1": {newValue: "value1"}, "test-prop2": {newValue: "value2"}},
-        "set (a)");
-
-      await checkGet(areaName, "test-prop1", "value1");
-      await checkGet(areaName, "test-prop2", "value2");
-
-      let data = await storage.get({"test-prop1": undefined, "test-prop2": undefined, "other": "default"});
-      browser.test.assertEq("value1", data["test-prop1"], "prop1 correct (a)");
-      browser.test.assertEq("value2", data["test-prop2"], "prop2 correct (a)");
-      browser.test.assertEq("default", data["other"], "other correct");
-
-      data = await storage.get(["test-prop1", "test-prop2", "other"]);
-      browser.test.assertEq("value1", data["test-prop1"], "prop1 correct (b)");
-      browser.test.assertEq("value2", data["test-prop2"], "prop2 correct (b)");
-      browser.test.assertFalse("other" in data, "other correct");
-
-      // Remove data in various ways.
-      await storage.remove("test-prop1");
-      await checkChanges(areaName, {"test-prop1": {oldValue: "value1"}}, "remove string");
-
-      data = await storage.get(["test-prop1", "test-prop2"]);
-      browser.test.assertFalse("test-prop1" in data, "prop1 absent (remove string)");
-      browser.test.assertTrue("test-prop2" in data, "prop2 present (remove string)");
-
-      await storage.set({"test-prop1": "value1"});
-      await checkChanges(areaName, {"test-prop1": {newValue: "value1"}}, "set (c)");
-
-      data = await storage.get(["test-prop1", "test-prop2"]);
-      browser.test.assertEq(data["test-prop1"], "value1", "prop1 correct (c)");
-      browser.test.assertEq(data["test-prop2"], "value2", "prop2 correct (c)");
-
-      await storage.remove(["test-prop1", "test-prop2"]);
-      await checkChanges(areaName,
-        {"test-prop1": {oldValue: "value1"}, "test-prop2": {oldValue: "value2"}},
-        "remove array");
-
-      data = await storage.get(["test-prop1", "test-prop2"]);
-      browser.test.assertFalse("test-prop1" in data, "prop1 absent (remove array)");
-      browser.test.assertFalse("test-prop2" in data, "prop2 absent (remove array)");
-
-      // test storage.clear
-      await storage.set({"test-prop1": "value1", "test-prop2": "value2"});
-      // Make sure that set() handler happened before we clear the
-      // promise again.
-      await globalChanges;
-
-      clearGlobalChanges();
-      await storage.clear();
-
-      await checkChanges(areaName,
-        {"test-prop1": {oldValue: "value1"}, "test-prop2": {oldValue: "value2"}},
-        "clear");
-      data = await storage.get(["test-prop1", "test-prop2"]);
-      browser.test.assertFalse("test-prop1" in data, "prop1 absent (clear)");
-      browser.test.assertFalse("test-prop2" in data, "prop2 absent (clear)");
-
-      // Make sure we can store complex JSON data.
-      // known previous values
-      await storage.set({"test-prop1": "value1", "test-prop2": "value2"});
-
-      // Make sure the set() handler landed.
-      await globalChanges;
-
-      clearGlobalChanges();
-      await storage.set({
-        "test-prop1": {
-          str: "hello",
-          bool: true,
-          null: null,
-          undef: undefined,
-          obj: {},
-          arr: [1, 2],
-          date: new Date(0),
-          regexp: /regexp/,
-          func: function func() {},
-          window,
-        },
-      });
-
-      await storage.set({"test-prop2": function func() {}});
-      const recentChanges = await globalChanges;
-
-      browser.test.assertEq("value1", recentChanges["test-prop1"].oldValue, "oldValue correct");
-      browser.test.assertEq("object", typeof(recentChanges["test-prop1"].newValue), "newValue is obj");
-      clearGlobalChanges();
-
-      data = await storage.get({"test-prop1": undefined, "test-prop2": undefined});
-      let obj = data["test-prop1"];
-
-      browser.test.assertEq("hello", obj.str, "string part correct");
-      browser.test.assertEq(true, obj.bool, "bool part correct");
-      browser.test.assertEq(null, obj.null, "null part correct");
-      browser.test.assertEq(undefined, obj.undef, "undefined part correct");
-      browser.test.assertEq(undefined, obj.func, "function part correct");
-      browser.test.assertEq(undefined, obj.window, "window part correct");
-      browser.test.assertEq("1970-01-01T00:00:00.000Z", obj.date, "date part correct");
-      browser.test.assertEq("/regexp/", obj.regexp, "regexp part correct");
-      browser.test.assertEq("object", typeof(obj.obj), "object part correct");
-      browser.test.assertTrue(Array.isArray(obj.arr), "array part present");
-      browser.test.assertEq(1, obj.arr[0], "arr[0] part correct");
-      browser.test.assertEq(2, obj.arr[1], "arr[1] part correct");
-      browser.test.assertEq(2, obj.arr.length, "arr.length part correct");
-
-      obj = data["test-prop2"];
-
-      browser.test.assertEq("[object Object]", {}.toString.call(obj), "function serialized as a plain object");
-      browser.test.assertEq(0, Object.keys(obj).length, "function serialized as an empty object");
-    } catch (e) {
-      browser.test.fail(`Error: ${e} :: ${e.stack}`);
-      browser.test.notifyFail("storage");
-    }
-  }
-
-  browser.test.onMessage.addListener(msg => {
-    let promise;
-    if (msg === "test-local") {
-      promise = runTests("local");
-    } else if (msg === "test-sync") {
-      promise = runTests("sync");
-    }
-    promise.then(() => browser.test.sendMessage("test-finished"));
-  });
-
-  browser.test.sendMessage("ready");
-}
-
-let extensionData = {
-  manifest: {
-    content_scripts: [{
-      "matches": ["http://mochi.test/*/file_sample.html"],
-      "js": ["content_script.js"],
-      "run_at": "document_idle",
-    }],
-
-    permissions: ["storage"],
-  },
-
-  files: {
-    "content_script.js": `(${contentScript})(${checkGetImpl})`,
-  },
-};
-
-add_task(function* test_contentscript() {
-  let win = window.open("file_sample.html");
-  yield waitForLoad(win);
-
-  yield SpecialPowers.pushPrefEnv({
-    set: [[STORAGE_SYNC_PREF, true]],
-  });
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield Promise.all([extension.startup(), extension.awaitMessage("ready")]);
-  extension.sendMessage("test-local");
-  yield extension.awaitMessage("test-finished");
-
-  extension.sendMessage("test-sync");
-  yield extension.awaitMessage("test-finished");
-
-  yield SpecialPowers.popPrefEnv();
-  yield extension.unload();
-
-  win.close();
-});
-
-add_task(function* test_local_cache_invalidation() {
-  let win = window.open("file_sample.html");
-
-  function background(checkGet) {
-    browser.test.onMessage.addListener(async msg => {
-      if (msg === "set-initial") {
-        await browser.storage.local.set({"test-prop1": "value1", "test-prop2": "value2"});
-        browser.test.sendMessage("set-initial-done");
-      } else if (msg === "check") {
-        await checkGet("local", "test-prop1", "value1");
-        await checkGet("local", "test-prop2", "value2");
-        browser.test.sendMessage("check-done");
-      }
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["storage"],
-    },
-    background: `(${background})(${checkGetImpl})`,
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage("set-initial");
-  yield extension.awaitMessage("set-initial-done");
-
-  SpecialPowers.invalidateExtensionStorageCache();
-
-  extension.sendMessage("check");
-  yield extension.awaitMessage("check-done");
-
-  yield extension.unload();
-  win.close();
-});
-
-add_task(function* test_config_flag_needed() {
-  let win = window.open("file_sample.html");
-  yield waitForLoad(win);
-
-  function background() {
-    let promises = [];
-    let apiTests = [
-      {method: "get", args: ["foo"]},
-      {method: "set", args: [{foo: "bar"}]},
-      {method: "remove", args: ["foo"]},
-      {method: "clear", args: []},
-    ];
-    apiTests.forEach(testDef => {
-      promises.push(browser.test.assertRejects(
-        browser.storage.sync[testDef.method](...testDef.args),
-        "Please set webextensions.storage.sync.enabled to true in about:config",
-        `storage.sync.${testDef.method} is behind a flag`));
-    });
-
-    Promise.all(promises).then(() => browser.test.notifyPass("flag needed"));
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["storage"],
-    },
-    background: `(${background})(${checkGetImpl})`,
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("flag needed");
-  yield extension.unload();
-  win.close();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_storage_tab.html b/toolkit/components/webextensions/test/mochitest/test_ext_storage_tab.html
deleted file mode 100644
index 32d8e6af0..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_storage_tab.html
+++ /dev/null
@@ -1,118 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_multiple_pages() {
-  async function background() {
-    let tabReady = new Promise(resolve => {
-      browser.runtime.onMessage.addListener(function listener(msg) {
-        browser.test.log("onMessage " + msg);
-        if (msg == "tab-ready") {
-          browser.runtime.onMessage.removeListener(listener);
-          resolve();
-        }
-      });
-    });
-
-    let tabId;
-    let tabRemoved = new Promise(resolve => {
-      browser.tabs.onRemoved.addListener(function listener(removedId) {
-        if (removedId == tabId) {
-          browser.tabs.onRemoved.removeListener(listener);
-
-          // Delay long enough to be sure the inner window has been nuked.
-          setTimeout(resolve, 0);
-        }
-      });
-    });
-
-    try {
-      let storage = browser.storage.local;
-
-      browser.test.log("create");
-      let tab = await browser.tabs.create({url: "tab.html"});
-      tabId = tab.id;
-
-      await tabReady;
-
-      let result = await storage.get("key");
-      browser.test.assertEq(undefined, result.key, "Key should be undefined");
-
-      await browser.runtime.sendMessage("tab-set-key");
-
-      result = await storage.get("key");
-      browser.test.assertEq(JSON.stringify({foo: {bar: "baz"}}),
-                            JSON.stringify(result.key),
-                            "Key should be set to the value from the tab");
-
-      browser.test.log("Remove tab");
-
-      await Promise.all([
-        browser.tabs.remove(tabId),
-        tabRemoved,
-      ]);
-
-      result = await storage.get("key");
-      browser.test.assertEq(JSON.stringify({foo: {bar: "baz"}}),
-                            JSON.stringify(result.key),
-                            "Key should still be set to the value from the tab");
-
-      browser.test.notifyPass("storage-multiple");
-    } catch (e) {
-      browser.test.fail(`Error: ${e} :: ${e.stack}`);
-      browser.test.notifyFail("storage-multiple");
-    }
-  }
-
-  function tab() {
-    browser.test.log("tab");
-    browser.runtime.onMessage.addListener(msg => {
-      if (msg == "tab-set-key") {
-        return browser.storage.local.set({key: {foo: {bar: "baz"}}});
-      }
-    });
-
-    browser.runtime.sendMessage("tab-ready");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-
-    files: {
-      "tab.html": `<!DOCTYPE html>
-        <html>
-          <head>
-            <meta charset="utf-8">
-            <script src="tab.js"><\/script>
-          </head>
-        </html>`,
-
-      "tab.js": tab,
-    },
-
-    manifest: {
-      permissions: ["storage"],
-    },
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("storage-multiple");
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_subframes_privileges.html b/toolkit/components/webextensions/test/mochitest/test_ext_subframes_privileges.html
deleted file mode 100644
index 1f3a9a3c9..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_subframes_privileges.html
+++ /dev/null
@@ -1,202 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtension test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_webext_tab_subframe_privileges() {
-  function background() {
-    browser.runtime.onMessage.addListener(async ({msg, success, tabId, error}) => {
-      if (msg == "webext-tab-subframe-privileges") {
-        if (success) {
-          await browser.tabs.remove(tabId);
-
-          browser.test.notifyPass(msg);
-        } else {
-          browser.test.log(`Got an unexpected error: ${error}`);
-
-          let tabs = await browser.tabs.query({active: true});
-          await browser.tabs.remove(tabs[0].id);
-
-          browser.test.notifyFail(msg);
-        }
-      }
-    });
-    browser.tabs.create({url: browser.runtime.getURL("/tab.html")});
-  }
-
-  async function tabSubframeScript() {
-    browser.test.assertTrue(browser.tabs != undefined,
-                            "Subframe of a privileged page has access to privileged APIs");
-    if (browser.tabs) {
-      try {
-        let tab = await browser.tabs.getCurrent();
-        browser.runtime.sendMessage({
-          msg: "webext-tab-subframe-privileges",
-          success: true,
-          tabId: tab.id,
-        });
-      } catch (e) {
-        browser.runtime.sendMessage({msg: "webext-tab-subframe-privileges", success: false, error: `${e}`});
-      }
-    } else {
-      browser.runtime.sendMessage({
-        msg: "webext-tab-subframe-privileges",
-        success: false,
-        error: `Privileged APIs missing in WebExtension tab sub-frame`,
-      });
-    }
-  }
-
-  let extensionData = {
-    background,
-    files: {
-      "tab.html": `<!DOCTYPE>
-          <head>
-            <meta charset="utf-8">
-          </head>
-          <body>
-            <iframe src="tab-subframe.html"></iframe>
-          </body>
-        </html>`,
-      "tab-subframe.html": `<!DOCTYPE>
-          <head>
-            <meta charset="utf-8">
-            <script src="tab-subframe.js"><\/script>
-          </head>
-        </html>`,
-      "tab-subframe.js": tabSubframeScript,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("webext-tab-subframe-privileges");
-  yield extension.unload();
-});
-
-add_task(function* test_webext_background_subframe_privileges() {
-  function backgroundSubframeScript() {
-    browser.test.assertTrue(browser.tabs != undefined,
-                            "Subframe of a background page has access to privileged APIs");
-    browser.test.notifyPass("webext-background-subframe-privileges");
-  }
-
-  let extensionData = {
-    manifest: {
-      background: {
-        page: "background.html",
-      },
-    },
-    files: {
-      "background.html": `<!DOCTYPE>
-         <head>
-           <meta charset="utf-8">
-         </head>
-         <body>
-           <iframe src="background-subframe.html"></iframe>
-         </body>
-       </html>`,
-      "background-subframe.html": `<!DOCTYPE>
-         <head>
-           <meta charset="utf-8">
-           <script src="background-subframe.js"><\/script>
-         </head>
-       </html>`,
-      "background-subframe.js": backgroundSubframeScript,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("webext-background-subframe-privileges");
-  yield extension.unload();
-});
-
-add_task(function* test_webext_contentscript_iframe_subframe_privileges() {
-  function background() {
-    browser.runtime.onMessage.addListener(({name, hasTabsAPI, hasStorageAPI}) => {
-      if (name == "contentscript-iframe-loaded") {
-        browser.test.assertFalse(hasTabsAPI,
-                                 "Subframe of a content script privileged iframes has no access to privileged APIs");
-        browser.test.assertTrue(hasStorageAPI,
-                                 "Subframe of a content script privileged iframes has access to content script APIs");
-
-        browser.test.notifyPass("webext-contentscript-subframe-privileges");
-      }
-    });
-  }
-
-  function subframeScript() {
-    browser.runtime.sendMessage({
-      name: "contentscript-iframe-loaded",
-      hasTabsAPI: browser.tabs != undefined,
-      hasStorageAPI: browser.storage != undefined,
-    });
-  }
-
-  function contentScript() {
-    let iframe = document.createElement("iframe");
-    iframe.setAttribute("src", browser.runtime.getURL("/contentscript-iframe.html"));
-    document.body.appendChild(iframe);
-  }
-
-  let extensionData = {
-    background,
-    manifest: {
-      "permissions": ["storage"],
-      "content_scripts": [{
-        "matches": ["http://example.com/*"],
-        "js": ["contentscript.js"],
-      }],
-      web_accessible_resources: [
-        "contentscript-iframe.html",
-      ],
-    },
-    files: {
-      "contentscript.js": contentScript,
-      "contentscript-iframe.html": `<!DOCTYPE>
-         <head>
-           <meta charset="utf-8">
-         </head>
-         <body>
-           <iframe src="contentscript-iframe-subframe.html"></iframe>
-         </body>
-       </html>`,
-      "contentscript-iframe-subframe.html": `<!DOCTYPE>
-         <head>
-           <meta charset="utf-8">
-           <script src="contentscript-iframe-subframe.js"><\/script>
-         </head>
-       </html>`,
-      "contentscript-iframe-subframe.js": subframeScript,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  let win = window.open("http://example.com");
-
-  yield extension.awaitFinish("webext-contentscript-subframe-privileges");
-
-  win.close();
-
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_tab_teardown.html b/toolkit/components/webextensions/test/mochitest/test_ext_tab_teardown.html
deleted file mode 100644
index dc351e48a..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_tab_teardown.html
+++ /dev/null
@@ -1,150 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for extension tab teardown</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-// Test for tabs opened using tabs.create and window.open
-function* runTabReloadAndCloseTest(extension) {
-  let chromeScript = SpecialPowers.loadChromeScript(
-      SimpleTest.getTestFileURL("file_teardown_test.js"));
-  yield chromeScript.promiseOneMessage("chromescript-startup");
-  function* getContextEvents() {
-    chromeScript.sendAsyncMessage("get-context-events");
-    let contextEvents = yield chromeScript.promiseOneMessage("context-events");
-    dump(JSON.stringify(contextEvents));
-    return contextEvents.filter(event => event.extensionId == extension.id);
-  }
-
-  extension.sendMessage("open extension page");
-  let extensionPageUrl = yield extension.awaitMessage("extension page loaded");
-
-  let contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 1, "ExtensionContext change for opening a tab");
-  is(contextEvents[0].eventType, "load", "create ExtensionContext for tab");
-  is(contextEvents[0].url, extensionPageUrl,
-      "ExtensionContext URL after tab creation should be tab URL");
-
-  extension.sendMessage("reload extension page");
-  let extensionPageUrl2 = yield extension.awaitMessage("extension page loaded");
-
-  is(extensionPageUrl, extensionPageUrl2,
-      "The tab's URL is expected to not change after a page reload");
-
-  contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 2, "ExtensionContext change after tab reload");
-  is(contextEvents[0].eventType, "unload", "unload old ExtensionContext");
-  is(contextEvents[0].url, extensionPageUrl,
-      "ExtensionContext URL before reload should be tab URL");
-  is(contextEvents[1].eventType, "load", "create new ExtensionContext for tab");
-  is(contextEvents[1].url, extensionPageUrl2,
-      "ExtensionContext URL after reload should be tab URL");
-
-  extension.sendMessage("close extension page");
-  yield extension.awaitMessage("closed extension page");
-
-  contextEvents = yield* getContextEvents();
-  is(contextEvents.length, 1, "ExtensionContext after closing tab");
-  is(contextEvents[0].eventType, "unload", "unload tab's ExtensionContext");
-  is(contextEvents[0].url, extensionPageUrl2,
-      "ExtensionContext URL at closing tab should be tab URL");
-
-  chromeScript.sendAsyncMessage("cleanup");
-  chromeScript.destroy();
-  yield extension.unload();
-}
-
-add_task(function* test_extension_page_tabs_create_reload_and_close() {
-  function background() {
-    let tabId;
-    browser.test.onMessage.addListener(msg => {
-      if (msg === "open extension page") {
-        chrome.tabs.create({url: "page.html"}, tab => {
-          tabId = tab.id;
-        });
-      } else if (msg === "reload extension page") {
-        chrome.tabs.reload(tabId);
-      } else if (msg === "close extension page") {
-        chrome.tabs.remove(tabId, () => {
-          browser.test.sendMessage("closed extension page");
-        });
-      }
-    });
-  }
-
-  function pageScript() {
-    browser.test.sendMessage("extension page loaded", document.URL);
-  }
-
-  let extensionData = {
-    background,
-    files: {
-      "page.html": `<!DOCTYPE html><meta charset="utf-8"><script src="page.js"><\/script>`,
-      "page.js": pageScript,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield* runTabReloadAndCloseTest(extension);
-});
-
-add_task(function* test_extension_page_window_open_reload_and_close() {
-  // This tests whether a context that is opened via window.open is properly
-  // disposed when the tab closes.
-  // The background page cannot use window.open (bugzil.la/1282021), so we open
-  // another extension page that manages the window.open-tab for testing.
-  function background() {
-    chrome.tabs.create({url: "window.open.html"});
-  }
-
-  function windowOpenScript() {
-    let win;
-    browser.test.onMessage.addListener(msg => {
-      if (msg === "open extension page") {
-        win = window.open("page.html");
-      } else if (msg === "reload extension page") {
-        win.location.reload();
-      } else if (msg === "close extension page") {
-        browser.tabs.onRemoved.addListener(function listener() {
-          browser.tabs.onRemoved.removeListener(listener);
-          browser.test.sendMessage("closed extension page");
-        });
-        win.close();
-      }
-    });
-    browser.test.sendMessage("setup-intermediate-tab");
-  }
-
-  function pageScript() {
-    browser.test.sendMessage("extension page loaded", document.URL);
-  }
-
-  let extensionData = {
-    background,
-    files: {
-      "page.html": `<!DOCTYPE html><meta charset="utf-8"><script src="page.js"><\/script>`,
-      "page.js": pageScript,
-      "window.open.html": `<!DOCTYPE html><meta charset="utf-8"><script src="window.open.js"><\/script>`,
-      "window.open.js": windowOpenScript,
-    },
-  };
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitMessage("setup-intermediate-tab");
-  yield* runTabReloadAndCloseTest(extension);
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_test.html b/toolkit/components/webextensions/test/mochitest/test_ext_test.html
deleted file mode 100644
index fef31e0e2..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_test.html
+++ /dev/null
@@ -1,191 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Testing test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-function loadExtensionAndInterceptTest(extensionData) {
-  let results = [];
-  let testResolve;
-  let testDone = new Promise(resolve => { testResolve = resolve; });
-  let handler = {
-    testResult(...result) {
-      result.pop();
-      results.push(result);
-      SimpleTest.info(`Received test result: ${JSON.stringify(result)}`);
-    },
-
-    testMessage(msg, ...args) {
-      results.push(["test-message", msg, ...args]);
-      SimpleTest.info(`Received message: ${msg} ${JSON.stringify(args)}`);
-      if (msg === "This is the last browser.test call") {
-        testResolve();
-      }
-    },
-  };
-  let extension = SpecialPowers.loadExtension(extensionData, handler);
-  SimpleTest.registerCleanupFunction(() => {
-    if (extension.state == "pending" || extension.state == "running") {
-      SimpleTest.ok(false, "Extension left running at test shutdown");
-      return extension.unload();
-    } else if (extension.state == "unloading") {
-      SimpleTest.ok(false, "Extension not fully unloaded at test shutdown");
-    }
-  });
-  extension.awaitResults = () => testDone.then(() => results);
-  return extension;
-}
-
-function testScript() {
-  // Note: The result of these browser.test calls are intercepted by the test.
-  // See verifyTestResults for the expectations of each browser.test call.
-  browser.test.notifyPass("dot notifyPass");
-  browser.test.notifyFail("dot notifyFail");
-  browser.test.log("dot log");
-  browser.test.fail("dot fail");
-  browser.test.succeed("dot succeed");
-  browser.test.assertTrue(true);
-  browser.test.assertFalse(false);
-  browser.test.assertEq("", "");
-
-  let obj = {};
-  let arr = [];
-  let dom = document.createElement("body");
-  browser.test.assertTrue(obj, "Object truthy");
-  browser.test.assertTrue(arr, "Array truthy");
-  browser.test.assertTrue(dom, "Element truthy");
-  browser.test.assertTrue(true, "True truthy");
-  browser.test.assertTrue(false, "False truthy");
-  browser.test.assertTrue(null, "Null truthy");
-  browser.test.assertTrue(undefined, "Void truthy");
-  browser.test.assertTrue(false, document.createElement("html"));
-
-  browser.test.assertFalse(obj, "Object falsey");
-  browser.test.assertFalse(arr, "Array falsey");
-  browser.test.assertFalse(dom, "Element falsey");
-  browser.test.assertFalse(true, "True falsey");
-  browser.test.assertFalse(false, "False falsey");
-  browser.test.assertFalse(null, "Null falsey");
-  browser.test.assertFalse(undefined, "Void falsey");
-  browser.test.assertFalse(true, document.createElement("head"));
-
-  browser.test.assertEq(obj, obj, "Object equality");
-  browser.test.assertEq(arr, arr, "Array equality");
-  browser.test.assertEq(dom, dom, "Element equality");
-  browser.test.assertEq(null, null, "Null equality");
-  browser.test.assertEq(undefined, undefined, "Void equality");
-
-  browser.test.assertEq({}, {}, "Object reference ineqality");
-  browser.test.assertEq([], [], "Array reference ineqality");
-  browser.test.assertEq(dom, document.createElement("body"), "Element ineqality");
-  browser.test.assertEq(null, undefined, "Null and void ineqality");
-  browser.test.assertEq(true, false, document.createElement("div"));
-
-  obj = {
-    toString() {
-      return "Dynamic toString forbidden";
-    },
-  };
-  browser.test.assertEq(obj, obj, "obj with dynamic toString()");
-  browser.test.sendMessage("Ran test at", location.protocol);
-  browser.test.sendMessage("This is the last browser.test call");
-}
-
-function verifyTestResults(results, shortName, expectedProtocol) {
-  let expectations = [
-    ["test-done", true, "dot notifyPass"],
-    ["test-done", false, "dot notifyFail"],
-    ["test-log", true, "dot log"],
-    ["test-result", false, "dot fail"],
-    ["test-result", true, "dot succeed"],
-    ["test-result", true, "undefined"],
-    ["test-result", true, "undefined"],
-    ["test-eq", true, "undefined", "", ""],
-
-    ["test-result", true, "Object truthy"],
-    ["test-result", true, "Array truthy"],
-    ["test-result", true, "Element truthy"],
-    ["test-result", true, "True truthy"],
-    ["test-result", false, "False truthy"],
-    ["test-result", false, "Null truthy"],
-    ["test-result", false, "Void truthy"],
-    ["test-result", false, "[object HTMLHtmlElement]"],
-
-    ["test-result", false, "Object falsey"],
-    ["test-result", false, "Array falsey"],
-    ["test-result", false, "Element falsey"],
-    ["test-result", false, "True falsey"],
-    ["test-result", true, "False falsey"],
-    ["test-result", true, "Null falsey"],
-    ["test-result", true, "Void falsey"],
-    ["test-result", false, "[object HTMLHeadElement]"],
-
-    ["test-eq", true, "Object equality", "[object Object]", "[object Object]"],
-    ["test-eq", true, "Array equality", "", ""],
-    ["test-eq", true, "Element equality", "[object HTMLBodyElement]", "[object HTMLBodyElement]"],
-    ["test-eq", true, "Null equality", "null", "null"],
-    ["test-eq", true, "Void equality", "undefined", "undefined"],
-
-    ["test-eq", false, "Object reference ineqality", "[object Object]", "[object Object] (different)"],
-    ["test-eq", false, "Array reference ineqality", "", " (different)"],
-    ["test-eq", false, "Element ineqality", "[object HTMLBodyElement]", "[object HTMLBodyElement] (different)"],
-    ["test-eq", false, "Null and void ineqality", "null", "undefined"],
-    ["test-eq", false, "[object HTMLDivElement]", "true", "false"],
-
-    ["test-eq", true, "obj with dynamic toString()", "[object Object]", "[object Object]"],
-
-    ["test-message", "Ran test at", expectedProtocol],
-    ["test-message", "This is the last browser.test call"],
-  ];
-
-  expectations.forEach((expectation, i) => {
-    let msg = expectation.slice(2).join(" - ");
-    isDeeply(results[i], expectation, `${shortName} (${msg})`);
-  });
-  is(results[expectations.length], undefined, "No more results");
-}
-
-add_task(function* test_test_in_background() {
-  let extensionData = {
-    background: `(${testScript})()`,
-  };
-
-  let extension = loadExtensionAndInterceptTest(extensionData);
-  yield extension.startup();
-  let results = yield extension.awaitResults();
-  verifyTestResults(results, "background page", "moz-extension:");
-  yield extension.unload();
-});
-
-add_task(function* test_test_in_content_script() {
-  let extensionData = {
-    manifest: {
-      content_scripts: [{
-        matches: ["http://mochi.test/*/file_sample.html"],
-        js: ["contentscript.js"],
-      }],
-    },
-    files: {
-      "contentscript.js": `(${testScript})()`,
-    },
-  };
-
-  let extension = loadExtensionAndInterceptTest(extensionData);
-  yield extension.startup();
-  let win = window.open("file_sample.html");
-  let results = yield extension.awaitResults();
-  win.close();
-  verifyTestResults(results, "content script", "http:");
-  yield extension.unload();
-});
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_unload_frame.html b/toolkit/components/webextensions/test/mochitest/test_ext_unload_frame.html
deleted file mode 100644
index 5572de281..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_unload_frame.html
+++ /dev/null
@@ -1,170 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>WebExtensions test</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
-</head>
-<body>
-
-<script>
-"use strict";
-
-/* globals delayedNotifyPass */ // Available in the background page of the test extensions.
-
-// Background and content script for testSendMessage_*
-function sendMessage_background() {
-  browser.runtime.onMessage.addListener((msg, sender, sendResponse) => {
-    browser.test.assertEq("from frame", msg, "Expected message from frame");
-    sendResponse("msg from back");  // Should not throw or anything like that.
-    delayedNotifyPass("Received sendMessage from closing frame");
-  });
-}
-function sendMessage_contentScript(testType) {
-  browser.runtime.sendMessage("from frame", reply => {
-    // The frame has been removed, so we should not get this callback!
-    browser.test.fail(`Unexpected reply: ${reply}`);
-  });
-  if (testType == "frame") {
-    frameElement.remove();
-  } else {
-    window.close();
-  }
-}
-
-// Background and content script for testConnect_*
-function connect_background() {
-  browser.runtime.onConnect.addListener(port => {
-    browser.test.assertEq("port from frame", port.name);
-
-    let disconnected = false;
-    let hasMessage = false;
-    port.onDisconnect.addListener(() => {
-      browser.test.assertFalse(disconnected, "onDisconnect should fire once");
-      disconnected = true;
-      browser.test.assertTrue(hasMessage, "Expected onMessage before onDisconnect");
-      browser.test.assertEq(null, port.error, "The port is implicitly closed without errors when the other context unloads");
-      delayedNotifyPass("Received onDisconnect from closing frame");
-    });
-    port.onMessage.addListener(msg => {
-      browser.test.assertFalse(hasMessage, "onMessage should fire once");
-      hasMessage = true;
-      browser.test.assertFalse(disconnected, "Should get message before disconnect");
-      browser.test.assertEq("from frame", msg, "Expected message from frame");
-    });
-
-    port.postMessage("reply to closing frame");
-  });
-}
-function connect_contentScript(testType) {
-  let isUnloading = false;
-  addEventListener("pagehide", () => { isUnloading = true; }, {once: true});
-
-  let port = browser.runtime.connect({name: "port from frame"});
-  port.onMessage.addListener(msg => {
-    // The background page sends a reply as soon as we call runtime.connect().
-    // It is possible that the reply reaches this frame before the
-    // window.close() request has been processed.
-    if (!isUnloading) {
-      browser.test.log(`Ignorting unexpected reply ("${msg}") because the page is not being unloaded.`);
-      return;
-    }
-
-    // The frame has been removed, so we should not get a reply.
-    browser.test.fail(`Unexpected reply: ${msg}`);
-  });
-  port.postMessage("from frame");
-
-  // Removing the frame or window should disconnect the port.
-  if (testType == "frame") {
-    frameElement.remove();
-  } else {
-    window.close();
-  }
-}
-
-// `testType` is "window" or "frame".
-function createTestExtension(testType, backgroundScript, contentScript) {
-  // Make a roundtrip between the background page and the test runner (which is
-  // in the same process as the content script) to make sure that we record a
-  // failure in case the content script's sendMessage or onMessage handlers are
-  // called even after the frame or window was removed.
-  function delayedNotifyPass(msg) {
-    browser.test.onMessage.addListener((type, echoMsg) => {
-      if (type == "pong") {
-        browser.test.assertEq(msg, echoMsg, "Echoed reply should be the same");
-        browser.test.notifyPass(msg);
-      }
-    });
-    browser.test.log("Starting ping-pong to flush messages...");
-    browser.test.sendMessage("ping", msg);
-  }
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `${delayedNotifyPass};(${backgroundScript})();`,
-    manifest: {
-      content_scripts: [{
-        js: ["contentscript.js"],
-        all_frames: testType == "frame",
-        matches: ["http://mochi.test/*/file_sample.html"],
-      }],
-    },
-    files: {
-      "contentscript.js": `(${contentScript})("${testType}");`,
-    },
-  });
-  extension.awaitMessage("ping").then(msg => {
-    extension.sendMessage("pong", msg);
-  });
-  return extension;
-}
-
-add_task(function* testSendMessage_and_remove_frame() {
-  let extension = createTestExtension("frame", sendMessage_background, sendMessage_contentScript);
-  yield extension.startup();
-
-  let frame = document.createElement("iframe");
-  frame.src = "file_sample.html";
-  document.body.appendChild(frame);
-
-  yield extension.awaitFinish("Received sendMessage from closing frame");
-  yield extension.unload();
-});
-
-add_task(function* testConnect_and_remove_frame() {
-  let extension = createTestExtension("frame", connect_background, connect_contentScript);
-  yield extension.startup();
-
-  let frame = document.createElement("iframe");
-  frame.src = "file_sample.html";
-  document.body.appendChild(frame);
-
-  yield extension.awaitFinish("Received onDisconnect from closing frame");
-  yield extension.unload();
-});
-
-add_task(function* testSendMessage_and_remove_window() {
-  let extension = createTestExtension("window", sendMessage_background, sendMessage_contentScript);
-  yield extension.startup();
-
-  window.open("file_sample.html");
-
-  yield extension.awaitFinish("Received sendMessage from closing frame");
-  yield extension.unload();
-});
-
-add_task(function* testConnect_and_remove_window() {
-  let extension = createTestExtension("window", connect_background, connect_contentScript);
-  yield extension.startup();
-
-  window.open("file_sample.html");
-
-  yield extension.awaitFinish("Received onDisconnect from closing frame");
-  yield extension.unload();
-});
-
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_web_accessible_resources.html b/toolkit/components/webextensions/test/mochitest/test_ext_web_accessible_resources.html
deleted file mode 100644
index fa3228739..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_web_accessible_resources.html
+++ /dev/null
@@ -1,353 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test the web_accessible_resources manifest directive</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/* eslint-disable mozilla/balanced-listeners */
-
-SimpleTest.registerCleanupFunction(() => {
-  SpecialPowers.clearUserPref("security.mixed_content.block_display_content");
-});
-
-let image = atob("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAA" +
-                 "ACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=");
-const IMAGE_ARRAYBUFFER = Uint8Array.from(image, byte => byte.charCodeAt(0)).buffer;
-
-async function testImageLoading(src, expectedAction) {
-  let imageLoadingPromise = new Promise((resolve, reject) => {
-    let cleanupListeners;
-    let testImage = document.createElement("img");
-    testImage.setAttribute("src", src);
-
-    let loadListener = () => {
-      cleanupListeners();
-      resolve(expectedAction === "loaded");
-    };
-
-    let errorListener = () => {
-      cleanupListeners();
-      resolve(expectedAction === "blocked");
-    };
-
-    cleanupListeners = () => {
-      testImage.removeEventListener("load", loadListener);
-      testImage.removeEventListener("error", errorListener);
-    };
-
-    testImage.addEventListener("load", loadListener);
-    testImage.addEventListener("error", errorListener);
-
-    document.body.appendChild(testImage);
-  });
-
-  let success = await imageLoadingPromise;
-  browser.runtime.sendMessage({name: "image-loading", expectedAction, success});
-}
-
-add_task(function* test_web_accessible_resources() {
-  function background() {
-    let gotURL;
-    let tabId;
-
-    function loadFrame(url) {
-      return new Promise(resolve => {
-        browser.tabs.sendMessage(tabId, ["load-iframe", url], reply => {
-          resolve(reply);
-        });
-      });
-    }
-
-    let urls = [
-      [browser.extension.getURL("accessible.html"), true],
-      [browser.extension.getURL("accessible.html") + "?foo=bar", true],
-      [browser.extension.getURL("accessible.html") + "#!foo=bar", true],
-      [browser.extension.getURL("forbidden.html"), false],
-      [browser.extension.getURL("wild1.html"), true],
-      [browser.extension.getURL("wild2.htm"), false],
-    ];
-
-    async function runTests() {
-      for (let [url, shouldLoad] of urls) {
-        let success = await loadFrame(url);
-
-        browser.test.assertEq(shouldLoad, success, "Load was successful");
-        if (shouldLoad) {
-          browser.test.assertEq(url, gotURL, "Got expected url");
-        } else {
-          browser.test.assertEq(undefined, gotURL, "Got no url");
-        }
-        gotURL = undefined;
-      }
-
-      browser.test.notifyPass("web-accessible-resources");
-    }
-
-    browser.runtime.onMessage.addListener(([msg, url], sender) => {
-      if (msg == "content-script-ready") {
-        tabId = sender.tab.id;
-        runTests();
-      } else if (msg == "page-script") {
-        browser.test.assertEq(undefined, gotURL, "Should have gotten only one message");
-        browser.test.assertEq("string", typeof(url), "URL should be a string");
-        gotURL = url;
-      }
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  function contentScript() {
-    browser.runtime.onMessage.addListener(([msg, url], sender, respond) => {
-      if (msg == "load-iframe") {
-        let iframe = document.createElement("iframe");
-        iframe.setAttribute("src", url);
-        iframe.addEventListener("load", () => { respond(true); });
-        iframe.addEventListener("error", () => { respond(false); });
-        document.body.appendChild(iframe);
-        return true;
-      }
-    });
-    browser.runtime.sendMessage(["content-script-ready"]);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://example.com/"],
-          "js": ["content_script.js"],
-          "run_at": "document_idle",
-        },
-      ],
-
-      "web_accessible_resources": [
-        "/accessible.html",
-        "wild*.html",
-      ],
-    },
-
-    background,
-
-    files: {
-      "content_script.js": contentScript,
-
-      "accessible.html": `<html><head>
-        <meta charset="utf-8">
-        <script src="accessible.js"><\/script>
-      </head></html>`,
-
-      "accessible.js": 'browser.runtime.sendMessage(["page-script", location.href]);',
-
-      "inaccessible.html": `<html><head>
-        <meta charset="utf-8">
-        <script src="inaccessible.js"><\/script>
-      </head></html>`,
-
-      "inaccessible.js": 'browser.runtime.sendMessage(["page-script", location.href]);',
-
-      "wild1.html": `<html><head>
-        <meta charset="utf-8">
-        <script src="wild.js"><\/script>
-      </head></html>`,
-
-      "wild2.htm": `<html><head>
-        <meta charset="utf-8">
-        <script src="wild.js"><\/script>
-      </head></html>`,
-
-      "wild.js": 'browser.runtime.sendMessage(["page-script", location.href]);',
-    },
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitMessage("ready");
-
-  let win = window.open("http://example.com/");
-
-  yield extension.awaitFinish("web-accessible-resources");
-
-  win.close();
-
-  yield extension.unload();
-});
-
-add_task(function* test_web_accessible_resources_csp() {
-  function background() {
-    browser.runtime.onMessage.addListener((msg, sender) => {
-      if (msg.name === "image-loading") {
-        browser.test.assertTrue(msg.success, `Image was ${msg.expectedAction}`);
-        browser.test.sendMessage(`image-${msg.expectedAction}`);
-      } else {
-        browser.test.sendMessage(msg);
-      }
-    });
-
-    browser.test.sendMessage("background-ready");
-  }
-
-  function content() {
-    window.addEventListener("message", function rcv(event) {
-      browser.runtime.sendMessage("script-ran");
-      window.removeEventListener("message", rcv, false);
-    }, false);
-
-    testImageLoading(browser.extension.getURL("image.png"), "loaded");
-
-    let testScriptElement = document.createElement("script");
-    testScriptElement.setAttribute("src", browser.extension.getURL("test_script.js"));
-    document.head.appendChild(testScriptElement);
-    browser.runtime.sendMessage("script-loaded");
-  }
-
-  function testScript() {
-    window.postMessage("test-script-loaded", "*");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "content_scripts": [{
-        "matches": ["http://example.com/*/file_csp.html"],
-        "run_at": "document_start",
-        "js": ["content_script_helper.js", "content_script.js"],
-      }],
-      "web_accessible_resources": [
-        "image.png",
-        "test_script.js",
-      ],
-    },
-    background,
-    files: {
-      "content_script_helper.js": `${testImageLoading}`,
-      "content_script.js": content,
-      "test_script.js": testScript,
-      "image.png": IMAGE_ARRAYBUFFER,
-    },
-  });
-
-  // This is used to watch the blocked data bounce off CSP.
-  function examiner() {
-    SpecialPowers.addObserver(this, "csp-on-violate-policy", false);
-  }
-
-  let cspEventCount = 0;
-
-  examiner.prototype = {
-    observe: function(subject, topic, data) {
-      cspEventCount++;
-      let spec = SpecialPowers.wrap(subject).QueryInterface(SpecialPowers.Ci.nsIURI).spec;
-      ok(spec.includes("file_image_bad.png") || spec.includes("file_script_bad.js"),
-         `Expected file: ${spec} rejected by CSP`);
-    },
-
-    // We must eventually call this to remove the listener,
-    // or mochitests might get borked.
-    remove: function() {
-      SpecialPowers.removeObserver(this, "csp-on-violate-policy");
-    },
-  };
-
-  let observer = new examiner();
-
-  yield Promise.all([extension.startup(), extension.awaitMessage("background-ready")]);
-
-  let win = window.open("http://example.com/tests/toolkit/components/extensions/test/mochitest/file_csp.html");
-
-  yield Promise.all([
-    extension.awaitMessage("image-loaded"),
-    extension.awaitMessage("script-loaded"),
-    extension.awaitMessage("script-ran"),
-  ]);
-  is(cspEventCount, 2, "Two items were rejected by CSP");
-  win.close();
-
-  observer.remove();
-  yield extension.unload();
-});
-
-add_task(function* test_web_accessible_resources_mixed_content() {
-  function background() {
-    browser.runtime.onMessage.addListener(msg => {
-      if (msg.name === "image-loading") {
-        browser.test.assertTrue(msg.success, `Image was ${msg.expectedAction}`);
-        browser.test.sendMessage(`image-${msg.expectedAction}`);
-      } else {
-        browser.test.sendMessage(msg);
-        if (msg === "accessible-script-loaded") {
-          browser.test.notifyPass("mixed-test");
-        }
-      }
-    });
-
-    browser.test.sendMessage("background-ready");
-  }
-
-  function content() {
-    testImageLoading("http://example.com/tests/toolkit/components/extensions/test/mochitest/file_image_bad.png", "blocked");
-    testImageLoading(browser.extension.getURL("image.png"), "loaded");
-
-    let testScriptElement = document.createElement("script");
-    testScriptElement.setAttribute("src", browser.extension.getURL("test_script.js"));
-    document.head.appendChild(testScriptElement);
-
-    window.addEventListener("message", event => {
-      browser.runtime.sendMessage(event.data);
-    });
-  }
-
-  function testScript() {
-    window.postMessage("accessible-script-loaded", "*");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "content_scripts": [{
-        "matches": ["https://example.com/*/file_mixed.html"],
-        "run_at": "document_start",
-        "js": ["content_script_helper.js", "content_script.js"],
-      }],
-      "web_accessible_resources": [
-        "image.png",
-        "test_script.js",
-      ],
-    },
-    background,
-    files: {
-      "content_script_helper.js": `${testImageLoading}`,
-      "content_script.js": content,
-      "test_script.js": testScript,
-      "image.png": IMAGE_ARRAYBUFFER,
-    },
-  });
-
-  SpecialPowers.setBoolPref("security.mixed_content.block_display_content", true);
-
-  yield Promise.all([extension.startup(), extension.awaitMessage("background-ready")]);
-
-  let win = window.open("https://example.com/tests/toolkit/components/extensions/test/mochitest/file_mixed.html");
-
-  yield Promise.all([
-    extension.awaitMessage("image-blocked"),
-    extension.awaitMessage("image-loaded"),
-    extension.awaitMessage("accessible-script-loaded"),
-  ]);
-  yield extension.awaitFinish("mixed-test");
-  win.close();
-
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_webnavigation.html b/toolkit/components/webextensions/test/mochitest/test_ext_webnavigation.html
deleted file mode 100644
index 2287fd9b1..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_webnavigation.html
+++ /dev/null
@@ -1,559 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/* globals sendMouseEvent */
-
-function backgroundScript() {
-  const BASE = "http://mochi.test:8888/tests/toolkit/components/extensions/test/mochitest";
-  const URL = BASE + "/file_WebNavigation_page1.html";
-
-  const EVENTS = [
-    "onTabReplaced",
-    "onBeforeNavigate",
-    "onCommitted",
-    "onDOMContentLoaded",
-    "onCompleted",
-    "onErrorOccurred",
-    "onReferenceFragmentUpdated",
-    "onHistoryStateUpdated",
-  ];
-
-  let expectedTabId = -1;
-
-  function gotEvent(event, details) {
-    if (!details.url.startsWith(BASE)) {
-      return;
-    }
-    browser.test.log(`Got ${event} ${details.url} ${details.frameId} ${details.parentFrameId}`);
-
-    if (expectedTabId == -1) {
-      browser.test.assertTrue(details.tabId !== undefined, "tab ID defined");
-      expectedTabId = details.tabId;
-    }
-
-    browser.test.assertEq(details.tabId, expectedTabId, "correct tab");
-
-    browser.test.sendMessage("received", {url: details.url, event});
-
-    if (details.url == URL) {
-      browser.test.assertEq(details.frameId, 0, "root frame ID correct");
-      browser.test.assertEq(details.parentFrameId, -1, "root parent frame ID correct");
-    } else {
-      browser.test.assertEq(details.parentFrameId, 0, "parent frame ID correct");
-      browser.test.assertTrue(details.frameId != 0, "frame ID probably okay");
-    }
-
-    browser.test.assertTrue(details.frameId !== undefined);
-    browser.test.assertTrue(details.parentFrameId !== undefined);
-  }
-
-  let listeners = {};
-  for (let event of EVENTS) {
-    listeners[event] = gotEvent.bind(null, event);
-    browser.webNavigation[event].addListener(listeners[event]);
-  }
-
-  browser.test.sendMessage("ready");
-}
-
-const BASE = "http://mochi.test:8888/tests/toolkit/components/extensions/test/mochitest";
-const URL = BASE + "/file_WebNavigation_page1.html";
-const FRAME = BASE + "/file_WebNavigation_page2.html";
-const FRAME2 = BASE + "/file_WebNavigation_page3.html";
-const FRAME_PUSHSTATE = BASE + "/file_WebNavigation_page3_pushState.html";
-const REDIRECT = BASE + "/redirection.sjs";
-const REDIRECTED = BASE + "/dummy_page.html";
-const CLIENT_REDIRECT = BASE + "/file_webNavigation_clientRedirect.html";
-const CLIENT_REDIRECT_HTTPHEADER = BASE + "/file_webNavigation_clientRedirect_httpHeaders.html";
-const FRAME_CLIENT_REDIRECT = BASE + "/file_webNavigation_frameClientRedirect.html";
-const FRAME_REDIRECT = BASE + "/file_webNavigation_frameRedirect.html";
-const FRAME_MANUAL = BASE + "/file_webNavigation_manualSubframe.html";
-const FRAME_MANUAL_PAGE1 = BASE + "/file_webNavigation_manualSubframe_page1.html";
-const FRAME_MANUAL_PAGE2 = BASE + "/file_webNavigation_manualSubframe_page2.html";
-const INVALID_PAGE = "https://invalid.localhost/";
-
-const REQUIRED = [
-  "onBeforeNavigate",
-  "onCommitted",
-  "onDOMContentLoaded",
-  "onCompleted",
-];
-
-var received = [];
-var completedResolve;
-var waitingURL, waitingEvent;
-
-function loadAndWait(win, event, url, script) {
-  received = [];
-  waitingEvent = event;
-  waitingURL = url;
-  dump(`RUN ${script}\n`);
-  script();
-  return new Promise(resolve => { completedResolve = resolve; });
-}
-
-add_task(function* webnav_transitions_props() {
-  function backgroundScriptTransitions() {
-    const EVENTS = [
-      "onCommitted",
-      "onCompleted",
-    ];
-
-    function gotEvent(event, details) {
-      browser.test.log(`Got ${event} ${details.url} ${details.transitionType} ${details.transitionQualifiers && JSON.stringify(details.transitionQualifiers)}`);
-
-      browser.test.sendMessage("received", {url: details.url, details, event});
-    }
-
-    let listeners = {};
-    for (let event of EVENTS) {
-      listeners[event] = gotEvent.bind(null, event);
-      browser.webNavigation[event].addListener(listeners[event]);
-    }
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extensionData = {
-    manifest: {
-      permissions: [
-        "webNavigation",
-      ],
-    },
-    background: backgroundScriptTransitions,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  extension.onMessage("received", ({url, event, details}) => {
-    received.push({url, event, details});
-
-    if (event == waitingEvent && url == waitingURL) {
-      completedResolve();
-    }
-  });
-
-  yield Promise.all([extension.startup(), extension.awaitMessage("ready")]);
-  info("webnavigation extension loaded");
-
-  let win = window.open();
-
-  yield loadAndWait(win, "onCompleted", URL, () => { win.location = URL; });
-
-  // transitionType: reload
-  received = [];
-  yield loadAndWait(win, "onCompleted", URL, () => { win.location.reload(); });
-
-  let found = received.find((data) => (data.event == "onCommitted" && data.url == URL));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "reload",
-       "Got the expected 'reload' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers),
-       "transitionQualifiers found in the OnCommitted events");
-  }
-
-  // transitionType: auto_subframe
-  found = received.find((data) => (data.event == "onCommitted" && data.url == FRAME));
-
-  ok(found, "Got the sub-frame onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "auto_subframe",
-       "Got the expected 'auto_subframe' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers),
-       "transitionQualifiers found in the OnCommitted events");
-  }
-
-  // transitionType: form_submit
-  received = [];
-  yield loadAndWait(win, "onCompleted", URL, () => {
-    win.document.querySelector("form").submit();
-  });
-
-  found = received.find((data) => (data.event == "onCommitted" && data.url == URL));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "form_submit",
-       "Got the expected 'form_submit' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers),
-       "transitionQualifiers found in the OnCommitted events");
-  }
-
-  // transitionQualifier: server_redirect
-  received = [];
-  yield loadAndWait(win, "onCompleted", REDIRECTED, () => { win.location = REDIRECT; });
-
-  found = received.find((data) => (data.event == "onCommitted" && data.url == REDIRECTED));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "link",
-       "Got the expected 'link' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers) &&
-       found.details.transitionQualifiers.find((q) => q == "server_redirect"),
-       "Got the expected 'server_redirect' transitionQualifiers in the OnCommitted events");
-  }
-
-  // transitionQualifier: forward_back
-  received = [];
-  yield loadAndWait(win, "onCompleted", URL, () => { win.history.back(); });
-
-  found = received.find((data) => (data.event == "onCommitted" && data.url == URL));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "link",
-       "Got the expected 'link' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers) &&
-       found.details.transitionQualifiers.find((q) => q == "forward_back"),
-       "Got the expected 'forward_back' transitionQualifiers in the OnCommitted events");
-  }
-
-  // transitionQualifier: client_redirect
-  // (from meta http-equiv tag)
-  received = [];
-  yield loadAndWait(win, "onCompleted", REDIRECTED, () => {
-    win.location = CLIENT_REDIRECT;
-  });
-
-  found = received.find((data) => (data.event == "onCommitted" && data.url == REDIRECTED));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "link",
-       "Got the expected 'link' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers) &&
-       found.details.transitionQualifiers.find((q) => q == "client_redirect"),
-       "Got the expected 'client_redirect' transitionQualifiers in the OnCommitted events");
-  }
-
-  // transitionQualifier: client_redirect
-  // (from http headers)
-  received = [];
-  yield loadAndWait(win, "onCompleted", REDIRECTED, () => {
-    win.location = CLIENT_REDIRECT_HTTPHEADER;
-  });
-
-  found = received.find((data) => (data.event == "onCommitted" &&
-                                   data.url == CLIENT_REDIRECT_HTTPHEADER));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "link",
-       "Got the expected 'link' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers) &&
-       found.details.transitionQualifiers.find((q) => q == "client_redirect"),
-       "Got the expected 'client_redirect' transitionQualifiers in the OnCommitted events");
-  }
-
-  // transitionQualifier: client_redirect (sub-frame)
-  // (from meta http-equiv tag)
-  received = [];
-  yield loadAndWait(win, "onCompleted", REDIRECTED, () => {
-    win.location = FRAME_CLIENT_REDIRECT;
-  });
-
-  found = received.find((data) => (data.event == "onCommitted" && data.url == REDIRECTED));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "auto_subframe",
-       "Got the expected 'auto_subframe' transitionType in the OnCommitted event");
-    ok(Array.isArray(found.details.transitionQualifiers) &&
-       found.details.transitionQualifiers.find((q) => q == "client_redirect"),
-       "Got the expected 'client_redirect' transitionQualifiers in the OnCommitted events");
-  }
-
-  // transitionQualifier: server_redirect (sub-frame)
-  received = [];
-  yield loadAndWait(win, "onCompleted", REDIRECTED, () => { win.location = FRAME_REDIRECT; });
-
-  found = received.find((data) => (data.event == "onCommitted" && data.url == REDIRECT));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "auto_subframe",
-       "Got the expected 'auto_subframe' transitionType in the OnCommitted event");
-    // BUG 1264936: currently the server_redirect is not detected in sub-frames
-    // once we fix it we can test it here:
-    //
-    // ok(Array.isArray(found.details.transitionQualifiers) &&
-    //    found.details.transitionQualifiers.find((q) => q == "server_redirect"),
-    //    "Got the expected 'server_redirect' transitionQualifiers in the OnCommitted events");
-  }
-
-  // transitionType: manual_subframe
-  received = [];
-  yield loadAndWait(win, "onCompleted", FRAME_MANUAL, () => { win.location = FRAME_MANUAL; });
-  found = received.find((data) => (data.event == "onCommitted" &&
-                                   data.url == FRAME_MANUAL_PAGE1));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "auto_subframe",
-       "Got the expected 'auto_subframe' transitionType in the OnCommitted event");
-  }
-
-  received = [];
-  yield loadAndWait(win, "onCompleted", FRAME_MANUAL_PAGE2, () => {
-    let el = win.document.querySelector("iframe")
-                .contentDocument.querySelector("a");
-    sendMouseEvent({type: "click"}, el, win);
-  });
-
-  found = received.find((data) => (data.event == "onCommitted" &&
-                                   data.url == FRAME_MANUAL_PAGE2));
-
-  ok(found, "Got the onCommitted event");
-
-  if (found) {
-    is(found.details.transitionType, "manual_subframe",
-       "Got the expected 'manual_subframe' transitionType in the OnCommitted event");
-  }
-
-  // cleanup phase
-  win.close();
-
-  yield extension.unload();
-  info("webnavigation extension unloaded");
-});
-
-add_task(function* webnav_ordering() {
-  let extensionData = {
-    manifest: {
-      permissions: [
-        "webNavigation",
-      ],
-    },
-    background: backgroundScript,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  extension.onMessage("received", ({url, event}) => {
-    received.push({url, event});
-
-    if (event == waitingEvent && url == waitingURL) {
-      completedResolve();
-    }
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-  info("webnavigation extension loaded");
-
-  let win = window.open();
-
-  yield loadAndWait(win, "onCompleted", URL, () => { win.location = URL; });
-
-  function checkRequired(url) {
-    for (let event of REQUIRED) {
-      let found = false;
-      for (let r of received) {
-        if (r.url == url && r.event == event) {
-          found = true;
-        }
-      }
-      ok(found, `Received event ${event} from ${url}`);
-    }
-  }
-
-  checkRequired(URL);
-  checkRequired(FRAME);
-
-  function checkBefore(action1, action2) {
-    function find(action) {
-      for (let i = 0; i < received.length; i++) {
-        if (received[i].url == action.url && received[i].event == action.event) {
-          return i;
-        }
-      }
-      return -1;
-    }
-
-    let index1 = find(action1);
-    let index2 = find(action2);
-    ok(index1 != -1, `Action ${JSON.stringify(action1)} happened`);
-    ok(index2 != -1, `Action ${JSON.stringify(action2)} happened`);
-    ok(index1 < index2, `Action ${JSON.stringify(action1)} happened before ${JSON.stringify(action2)}`);
-  }
-
-  // As required in the webNavigation API documentation:
-  // If a navigating frame contains subframes, its onCommitted is fired before any
-  // of its children's onBeforeNavigate; while onCompleted is fired after
-  // all of its children's onCompleted.
-  checkBefore({url: URL, event: "onCommitted"}, {url: FRAME, event: "onBeforeNavigate"});
-  checkBefore({url: FRAME, event: "onCompleted"}, {url: URL, event: "onCompleted"});
-
-  // As required in the webNAvigation API documentation, check the event sequence:
-  // onBeforeNavigate -> onCommitted -> onDOMContentLoaded -> onCompleted
-  let expectedEventSequence = [
-    "onBeforeNavigate", "onCommitted", "onDOMContentLoaded", "onCompleted",
-  ];
-
-  for (let i = 1; i < expectedEventSequence.length; i++) {
-    let after = expectedEventSequence[i];
-    let before = expectedEventSequence[i - 1];
-    checkBefore({url: URL, event: before}, {url: URL, event: after});
-    checkBefore({url: FRAME, event: before}, {url: FRAME, event: after});
-  }
-
-  yield loadAndWait(win, "onCompleted", FRAME2, () => { win.frames[0].location = FRAME2; });
-
-  checkRequired(FRAME2);
-
-  let navigationSequence = [
-    {
-      action: () => { win.frames[0].document.getElementById("elt").click(); },
-      waitURL: `${FRAME2}#ref`,
-      expectedEvent: "onReferenceFragmentUpdated",
-      description: "clicked an anchor link",
-    },
-    {
-      action: () => { win.frames[0].history.pushState({}, "History PushState", `${FRAME2}#ref2`); },
-      waitURL: `${FRAME2}#ref2`,
-      expectedEvent: "onReferenceFragmentUpdated",
-      description: "history.pushState, same pathname, different hash",
-    },
-    {
-      action: () => { win.frames[0].history.pushState({}, "History PushState", `${FRAME2}#ref2`); },
-      waitURL: `${FRAME2}#ref2`,
-      expectedEvent: "onHistoryStateUpdated",
-      description: "history.pushState, same pathname, same hash",
-    },
-    {
-      action: () => {
-        win.frames[0].history.pushState({}, "History PushState", `${FRAME2}?query_param1=value#ref2`);
-      },
-      waitURL: `${FRAME2}?query_param1=value#ref2`,
-      expectedEvent: "onHistoryStateUpdated",
-      description: "history.pushState, same pathname, same hash, different query params",
-    },
-    {
-      action: () => {
-        win.frames[0].history.pushState({}, "History PushState", `${FRAME2}?query_param2=value#ref3`);
-      },
-      waitURL: `${FRAME2}?query_param2=value#ref3`,
-      expectedEvent: "onHistoryStateUpdated",
-      description: "history.pushState, same pathname, different hash, different query params",
-    },
-    {
-      action: () => { win.frames[0].history.pushState(null, "History PushState", FRAME_PUSHSTATE); },
-      waitURL: FRAME_PUSHSTATE,
-      expectedEvent: "onHistoryStateUpdated",
-      description: "history.pushState, different pathname",
-    },
-  ];
-
-  for (let navigation of navigationSequence) {
-    let {expectedEvent, waitURL, action, description} = navigation;
-    info(`Waiting ${expectedEvent} from ${waitURL} - ${description}`);
-    yield loadAndWait(win, expectedEvent, waitURL, action);
-    info(`Received ${expectedEvent} from ${waitURL} - ${description}`);
-  }
-
-  for (let i = navigationSequence.length - 1; i > 0; i--) {
-    let {waitURL: fromURL, expectedEvent} = navigationSequence[i];
-    let {waitURL} = navigationSequence[i - 1];
-    info(`Waiting ${expectedEvent} from ${waitURL} - history.back() from ${fromURL} to ${waitURL}`);
-    yield loadAndWait(win, expectedEvent, waitURL, () => { win.frames[0].history.back(); });
-    info(`Received ${expectedEvent} from ${waitURL} - history.back() from ${fromURL} to ${waitURL}`);
-  }
-
-  for (let i = 0; i < navigationSequence.length - 1; i++) {
-    let {waitURL: fromURL} = navigationSequence[i];
-    let {waitURL, expectedEvent} = navigationSequence[i + 1];
-    info(`Waiting ${expectedEvent} from ${waitURL} - history.forward() from ${fromURL} to ${waitURL}`);
-    yield loadAndWait(win, expectedEvent, waitURL, () => { win.frames[0].history.forward(); });
-    info(`Received ${expectedEvent} from ${waitURL} - history.forward() from ${fromURL} to ${waitURL}`);
-  }
-
-  win.close();
-
-  yield extension.unload();
-  info("webnavigation extension unloaded");
-});
-
-add_task(function* webnav_error_event() {
-  function backgroundScriptErrorEvent() {
-    browser.webNavigation.onErrorOccurred.addListener((details) => {
-      browser.test.log(`Got onErrorOccurred ${details.url} ${details.error}`);
-
-      browser.test.sendMessage("received", {url: details.url, details, event: "onErrorOccurred"});
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extensionData = {
-    manifest: {
-      permissions: [
-        "webNavigation",
-      ],
-    },
-    background: backgroundScriptErrorEvent,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  extension.onMessage("received", ({url, event, details}) => {
-    received.push({url, event, details});
-
-    if (event == waitingEvent && url == waitingURL) {
-      completedResolve();
-    }
-  });
-
-  yield Promise.all([extension.startup(), extension.awaitMessage("ready")]);
-  info("webnavigation extension loaded");
-
-  let win = window.open();
-
-  received = [];
-  yield loadAndWait(win, "onErrorOccurred", INVALID_PAGE, () => { win.location = INVALID_PAGE; });
-
-  let found = received.find((data) => (data.event == "onErrorOccurred" &&
-                                   data.url == INVALID_PAGE));
-
-  ok(found, "Got the onErrorOccurred event");
-
-  if (found) {
-    ok(found.details.error.match(/Error code [0-9]+/),
-      "Got the expected error string in the onErrorOccurred event");
-  }
-
-  // cleanup phase
-  win.close();
-
-  yield extension.unload();
-  info("webnavigation extension unloaded");
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_webnavigation_filters.html b/toolkit/components/webextensions/test/mochitest/test_ext_webnavigation_filters.html
deleted file mode 100644
index a0de5e9e5..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_webnavigation_filters.html
+++ /dev/null
@@ -1,308 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_webnav_unresolved_uri_on_expected_URI_scheme() {
-  function background() {
-    let lastTest;
-
-    function cleanupTestListeners() {
-      if (lastTest) {
-        let {event, okListener, failListener} = lastTest;
-        lastTest = null;
-        browser.test.log(`Cleanup previous test event listeners`);
-        browser.webNavigation[event].removeListener(okListener);
-        browser.webNavigation[event].removeListener(failListener);
-      }
-    }
-
-    function createTestListener(event, fail, urlFilter) {
-      function listener(details) {
-        let log = JSON.stringify({url: details.url, urlFilter});
-        if (fail) {
-          browser.test.fail(`Got an unexpected ${event} on the failure listener: ${log}`);
-        } else {
-          browser.test.succeed(`Got the expected ${event} on the success listener: ${log}`);
-        }
-
-        cleanupTestListeners();
-        browser.test.sendMessage("test-filter-next");
-      }
-
-      browser.webNavigation[event].addListener(listener, urlFilter);
-
-      return listener;
-    }
-
-    browser.test.onMessage.addListener((msg, event, okFilter, failFilter) => {
-      if (msg !== "test-filter") {
-        return;
-      }
-
-      lastTest = {
-        event,
-        // Register the failListener first, which should not be called
-        // and if it is called the test scenario is marked as a failure.
-        failListener: createTestListener(event, true, failFilter),
-        okListener: createTestListener(event, false, okFilter),
-      };
-
-      browser.test.sendMessage("test-filter-ready");
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extensionData = {
-    manifest: {
-      permissions: [
-        "webNavigation",
-      ],
-    },
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-
-  yield extension.awaitMessage("ready");
-
-  let win = window.open();
-
-  let testFilterScenarios = [
-    {
-      url: "http://example.net/browser",
-      filters: [
-        // schemes
-        {
-          okFilter: [{schemes: ["http"]}],
-          failFilter: [{schemes: ["https"]}],
-        },
-        // ports
-        {
-          okFilter: [{ports: [80, 22, 443]}],
-          failFilter: [{ports: [81, 82, 83]}],
-        },
-        {
-          okFilter: [{ports: [22, 443, [10, 80]]}],
-          failFilter: [{ports: [22, 23, [81, 100]]}],
-        },
-      ],
-    },
-    {
-      url: "http://example.net/browser?param=1#ref",
-      filters: [
-        // host: Equals, Contains, Prefix, Suffix
-        {
-          okFilter: [{hostEquals: "example.net"}],
-          failFilter: [{hostEquals: "example.com"}],
-        },
-        {
-          okFilter: [{hostContains: ".example"}],
-          failFilter: [{hostContains: ".www"}],
-        },
-        {
-          okFilter: [{hostPrefix: "example"}],
-          failFilter: [{hostPrefix: "www"}],
-        },
-        {
-          okFilter: [{hostSuffix: "net"}],
-          failFilter: [{hostSuffix: "com"}],
-        },
-        // path: Equals, Contains, Prefix, Suffix
-        {
-          okFilter: [{pathEquals: "/browser"}],
-          failFilter: [{pathEquals: "/"}],
-        },
-        {
-          okFilter: [{pathContains: "brow"}],
-          failFilter: [{pathContains: "tool"}],
-        },
-        {
-          okFilter: [{pathPrefix: "/bro"}],
-          failFilter: [{pathPrefix: "/tool"}],
-        },
-        {
-          okFilter: [{pathSuffix: "wser"}],
-          failFilter: [{pathSuffix: "kit"}],
-        },
-        // query: Equals, Contains, Prefix, Suffix
-        {
-          okFilter: [{queryEquals: "param=1"}],
-          failFilter: [{queryEquals: "wrongparam=2"}],
-        },
-        {
-          okFilter: [{queryContains: "param"}],
-          failFilter: [{queryContains: "wrongparam"}],
-        },
-        {
-          okFilter: [{queryPrefix: "param="}],
-          failFilter: [{queryPrefix: "wrong"}],
-        },
-        {
-          okFilter: [{querySuffix: "=1"}],
-          failFilter: [{querySuffix: "=2"}],
-        },
-        // urlMatches, originAndPathMatches
-        {
-          okFilter: [{urlMatches: "example.net/.*\?param=1"}],
-          failFilter: [{urlMatches: "example.net/.*\?wrongparam=2"}],
-        },
-        {
-          okFilter: [{originAndPathMatches: "example.net\/browser"}],
-          failFilter: [{originAndPathMatches: "example.net/.*\?param=1"}],
-        },
-      ],
-    },
-    {
-      url: "http://example.net/browser",
-      filters: [
-        // multiple criteria in a single filter:
-        // if one of the critera is not verified, the event should not be received.
-        {
-          okFilter: [{schemes: ["http"], ports: [80, 22, 443]}],
-          failFilter: [{schemes: ["http"], ports: [81, 82, 83]}],
-        },
-        // multiple urlFilters on the same listener
-        // if at least one of the critera is verified, the event should be received.
-        {
-          okFilter: [{schemes: ["https"]}, {ports: [80, 22, 443]}],
-          failFilter: [{schemes: ["https"]}, {ports: [81, 82, 83]}],
-        },
-      ],
-    },
-  ];
-
-  function* runTestScenario(event, {url, filters}) {
-    for (let testFilters of filters) {
-      let {okFilter, failFilter} = testFilters;
-
-      info(`Prepare the new test scenario: ${event} ${url} ${JSON.stringify(testFilters)}`);
-      win.location = "about:blank";
-
-      extension.sendMessage("test-filter", event, {url: okFilter}, {url: failFilter});
-      yield extension.awaitMessage("test-filter-ready");
-
-      info(`Loading the test url: ${url}`);
-      win.location = url;
-
-      yield extension.awaitMessage("test-filter-next");
-
-      info("Test scenario completed. Moving to the next test scenario.");
-    }
-  }
-
-  const BASE_WEBNAV_EVENTS = [
-    "onBeforeNavigate",
-    "onCommitted",
-    "onDOMContentLoaded",
-    "onCompleted",
-  ];
-
-  info("WebNavigation event filters test scenarios starting...");
-
-  for (let filterScenario of testFilterScenarios) {
-    for (let event of BASE_WEBNAV_EVENTS) {
-      yield runTestScenario(event, filterScenario);
-    }
-  }
-
-  info("WebNavigation event filters test onReferenceFragmentUpdated scenario starting...");
-
-  const BASE = "http://mochi.test:8888/tests/toolkit/components/extensions/test/mochitest";
-  let url = BASE + "/file_WebNavigation_page3.html";
-
-  let okFilter = [{urlContains: "_page3.html"}];
-  let failFilter = [{ports: [444]}];
-  let event = "onCompleted";
-
-  info(`Loading the initial test url: ${url}`);
-  extension.sendMessage("test-filter", event, {url: okFilter}, {url: failFilter});
-
-  yield extension.awaitMessage("test-filter-ready");
-  win.location = url;
-  yield extension.awaitMessage("test-filter-next");
-
-  event = "onReferenceFragmentUpdated";
-  extension.sendMessage("test-filter", event, {url: okFilter}, {url: failFilter});
-
-  yield extension.awaitMessage("test-filter-ready");
-  win.location = url + "#ref1";
-  yield extension.awaitMessage("test-filter-next");
-
-  info("WebNavigation event filters test onHistoryStateUpdated scenario starting...");
-
-  event = "onHistoryStateUpdated";
-  extension.sendMessage("test-filter", event, {url: okFilter}, {url: failFilter});
-  yield extension.awaitMessage("test-filter-ready");
-
-  win.history.pushState({}, "", BASE + "/pushState_page3.html");
-  yield extension.awaitMessage("test-filter-next");
-
-  // TODO: add additional specific tests for the other webNavigation events:
-  // onErrorOccurred (and onCreatedNavigationTarget on supported)
-
-  info("WebNavigation event filters test scenarios completed.");
-
-  yield extension.unload();
-
-  win.close();
-});
-
-add_task(function* test_webnav_empty_filter_validation_error() {
-  function background() {
-    let catchedException;
-
-    try {
-      browser.webNavigation.onCompleted.addListener(
-        // Empty callback (not really used)
-        () => {},
-        // Empty filter (which should raise a validation error exception).
-        {url: []}
-      );
-    } catch (e) {
-      catchedException = e;
-      browser.test.log(`Got an exception`);
-    }
-
-    if (catchedException &&
-        catchedException.message.includes("Type error for parameter filters") &&
-        catchedException.message.includes("Array requires at least 1 items; you have 0")) {
-      browser.test.notifyPass("webNav.emptyFilterValidationError");
-    } else {
-      browser.test.notifyFail("webNav.emptyFilterValidationError");
-    }
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webNavigation",
-      ],
-    },
-    background,
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("webNav.emptyFilterValidationError");
-
-  yield extension.unload();
-});
-
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_background_events.html b/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_background_events.html
deleted file mode 100644
index 78efeab35..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_background_events.html
+++ /dev/null
@@ -1,116 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_webRequest_serviceworker_events() {
-  yield SpecialPowers.pushPrefEnv({
-    set: [["dom.serviceWorkers.testing.enabled", true],
-          ["dom.serviceWorkers.enabled", true],
-          ["dom.serviceWorkers.openWindow.enabled", true],
-         ],
-  });
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "<all_urls>",
-      ],
-    },
-    background() {
-      let eventNames = new Set([
-        "onBeforeRequest",
-        "onBeforeSendHeaders",
-        "onSendHeaders",
-        "onHeadersReceived",
-        "onResponseStarted",
-        "onCompleted",
-      ]);
-
-      function listener(name, details) {
-        browser.test.assertTrue(eventNames.has(name), `recieved ${name}`);
-        eventNames.delete(name);
-        if (eventNames.size == 0) {
-          browser.test.sendMessage("done");
-        }
-      }
-
-      for (let name of eventNames) {
-        browser.webRequest[name].addListener(
-          listener.bind(null, name),
-          {urls: ["https://example.com/*"]}
-        );
-      }
-    },
-  });
-
-  yield extension.startup();
-  let registration = yield navigator.serviceWorker.register("webrequest_worker.js", {scope: "."});
-  yield extension.awaitMessage("done");
-  yield registration.unregister();
-  yield extension.unload();
-});
-
-add_task(function* test_webRequest_background_events() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "<all_urls>",
-      ],
-    },
-    background() {
-      let eventNames = new Set([
-        "onBeforeRequest",
-        "onBeforeSendHeaders",
-        "onSendHeaders",
-        "onHeadersReceived",
-        "onResponseStarted",
-        "onCompleted",
-      ]);
-
-      function listener(name, details) {
-        browser.test.assertTrue(eventNames.has(name), `recieved ${name}`);
-        eventNames.delete(name);
-
-        if (eventNames.size === 0) {
-          browser.test.assertEq(0, eventNames.size, "messages recieved");
-          browser.test.sendMessage("done");
-        }
-      }
-
-      for (let name of eventNames) {
-        browser.webRequest[name].addListener(
-          listener.bind(null, name),
-          {urls: ["https://example.com/*"]}
-        );
-      }
-
-      fetch("https://example.com/example.txt").then(() => {
-        browser.test.pass("Fetch succeeded.");
-      }, () => {
-        browser.test.fail("fetch recieved");
-        browser.test.sendMessage("done");
-      });
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("done");
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_basic.html b/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_basic.html
deleted file mode 100644
index ef77fee3b..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_basic.html
+++ /dev/null
@@ -1,327 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <script type="text/javascript" src="head_webrequest.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-<script>
-"use strict";
-
-let extension;
-add_task(function* setup() {
-  // SelfSupport has a tendency to fire when running this test alone, without
-  // a good way to turn it off we just set the url to ""
-  yield SpecialPowers.pushPrefEnv({
-    set: [["browser.selfsupport.url", ""]],
-  });
-
-  // Clear the image cache, since it gets in the way otherwise.
-  let imgTools = SpecialPowers.Cc["@mozilla.org/image/tools;1"].getService(SpecialPowers.Ci.imgITools);
-  let cache = imgTools.getImgCacheForDocument(document);
-  cache.clearCache(false);
-
-  extension = makeExtension();
-  yield extension.startup();
-});
-
-// expect is a set of test values used by the background script.
-//
-// type: type of request action
-// events: optional, If defined only the events listed are expected for the
-//                   request. If undefined, all events except onErrorOccurred
-//                   and onBeforeRedirect are expected.  Must be in order received.
-// redirect: url to redirect to during onBeforeSendHeaders
-// status: number    expected status during onHeadersReceived, 200 default
-// cancel: event in which we return cancel=true.  cancelled message is sent.
-// cached: expected fromCache value, default is false, checked in onCompletion
-// headers: request or response headers to modify
-
-add_task(function* test_webRequest_links() {
-  let expect = {
-    "file_style_bad.css": {
-      type: "stylesheet",
-      events: ["onBeforeRequest", "onErrorOccurred"],
-      cancel: "onBeforeRequest",
-    },
-    "file_style_redirect.css": {
-      type: "stylesheet",
-      events: ["onBeforeRequest", "onBeforeSendHeaders", "onBeforeRedirect"],
-      optional_events: ["onHeadersReceived"],
-      redirect: "file_style_good.css",
-    },
-    "file_style_good.css": {
-      type: "stylesheet",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addStylesheet("file_style_bad.css");
-  yield extension.awaitMessage("cancelled");
-  // we redirect to style_good which completes the test
-  addStylesheet("file_style_redirect.css");
-  yield extension.awaitMessage("done");
-
-  let style = window.getComputedStyle(document.getElementById("test"), null);
-  is(style.getPropertyValue("color"), "rgb(255, 0, 0)", "Good CSS loaded");
-});
-
-add_task(function* test_webRequest_images() {
-  let expect = {
-    "file_image_bad.png": {
-      type: "image",
-      events: ["onBeforeRequest", "onErrorOccurred"],
-      cancel: "onBeforeRequest",
-    },
-    "file_image_redirect.png": {
-      type: "image",
-      events: ["onBeforeRequest", "onBeforeSendHeaders", "onBeforeRedirect"],
-      optional_events: ["onHeadersReceived"],
-      redirect: "file_image_good.png",
-    },
-    "file_image_good.png": {
-      type: "image",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addImage("file_image_bad.png");
-  yield extension.awaitMessage("cancelled");
-  // we redirect to image_good which completes the test
-  addImage("file_image_redirect.png");
-  yield extension.awaitMessage("done");
-});
-
-add_task(function* test_webRequest_scripts() {
-  let expect = {
-    "file_script_bad.js": {
-      type: "script",
-      events: ["onBeforeRequest", "onErrorOccurred"],
-      cancel: "onBeforeRequest",
-    },
-    "file_script_redirect.js": {
-      type: "script",
-      events: ["onBeforeRequest", "onBeforeSendHeaders", "onBeforeRedirect"],
-      optional_events: ["onHeadersReceived"],
-      redirect: "file_script_good.js",
-    },
-    "file_script_good.js": {
-      type: "script",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addScript("file_script_bad.js");
-  yield extension.awaitMessage("cancelled");
-  // we redirect to script_good which completes the test
-  addScript("file_script_redirect.js");
-  yield extension.awaitMessage("done");
-
-  is(window.success, 1, "Good script ran");
-  is(window.failure, undefined, "Failure script didn't run");
-});
-
-add_task(function* test_webRequest_xhr_get() {
-  let expect = {
-    "file_script_xhr.js": {
-      type: "script",
-    },
-    "xhr_resource": {
-      status: 404,
-      type: "xmlhttprequest",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addScript("file_script_xhr.js");
-  yield extension.awaitMessage("done");
-});
-
-add_task(function* test_webRequest_nonexistent() {
-  let expect = {
-    "nonexistent_script_url.js": {
-      status: 404,
-      type: "script",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addScript("nonexistent_script_url.js");
-  yield extension.awaitMessage("done");
-});
-
-add_task(function* test_webRequest_checkCached() {
-  let expect = {
-    "file_image_good.png": {
-      type: "image",
-      cached: true,
-    },
-    "file_script_good.js": {
-      type: "script",
-      cached: true,
-    },
-    "file_style_good.css": {
-      type: "stylesheet",
-      cached: true,
-    },
-    "nonexistent_script_url.js": {
-      status: 404,
-      type: "script",
-      cached: false,
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addImage("file_image_good.png");
-  addScript("file_script_good.js");
-  addStylesheet("file_style_good.css");
-  addScript("nonexistent_script_url.js");
-  yield extension.awaitMessage("done");
-
-  is(window.success, 2, "Good script ran");
-  is(window.failure, undefined, "Failure script didn't run");
-});
-
-add_task(function* test_webRequest_headers() {
-  let expect = {
-    "file_script_nonexistent.js": {
-      type: "script",
-      status: 404,
-      headers: {
-        request: {
-          add: {
-            "X-WebRequest-request": "text",
-            "X-WebRequest-request-binary": "binary",
-          },
-          modify: {
-            "user-agent": "WebRequest",
-          },
-          remove: [
-            "referer",
-          ],
-        },
-        response: {
-          add: {
-            "X-WebRequest-response": "text",
-            "X-WebRequest-response-binary": "binary",
-          },
-          modify: {
-            "server": "WebRequest",
-            "content-type": "text/html; charset=utf-8",
-          },
-          remove: [
-            "connection",
-          ],
-        },
-      },
-      completion: "onCompleted",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addScript("file_script_nonexistent.js");
-  yield extension.awaitMessage("done");
-});
-
-add_task(function* test_webRequest_tabId() {
-  let expect = {
-    "file_WebRequest_page3.html": {
-      type: "main_frame",
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  let a = addLink("file_WebRequest_page3.html?trigger=a");
-  a.click();
-  yield extension.awaitMessage("done");
-});
-
-add_task(function* test_webRequest_tabId_browser() {
-  async function background(url) {
-    let tabId;
-    browser.test.onMessage.addListener(async (msg, expected) => {
-      await browser.tabs.remove(tabId);
-      browser.test.sendMessage("done");
-    });
-
-    let tab = await browser.tabs.create({url});
-    tabId = tab.id;
-  }
-
-  let tabExt = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "tabs",
-      ],
-    },
-    background: `(${background})('${SimpleTest.getTestFileURL("file_sample.html")}?nocache=${Math.random()}')`,
-  });
-
-  let expect = {
-    "file_sample.html": {
-      type: "main_frame",
-    },
-  };
-  // expecting origin == undefined
-  extension.sendMessage("set-expected", {expect});
-  yield extension.awaitMessage("continue");
-
-  // open a tab from a system principal
-  yield tabExt.startup();
-
-  yield extension.awaitMessage("done");
-  tabExt.sendMessage("done");
-  yield tabExt.awaitMessage("done");
-  yield tabExt.unload();
-});
-
-add_task(function* test_webRequest_frames() {
-  let expect = {
-    "text/plain,webRequestTest": {
-      type: "sub_frame",
-      events: ["onBeforeRequest", "onCompleted"],
-    },
-    "text/plain,webRequestTest_bad": {
-      type: "sub_frame",
-      events: ["onBeforeRequest", "onCompleted"],
-      cancel: "onBeforeRequest",
-    },
-    "redirection.sjs": {
-      status: 302,
-      type: "sub_frame",
-      events: ["onBeforeRequest", "onBeforeSendHeaders", "onSendHeaders", "onHeadersReceived", "onBeforeRedirect"],
-    },
-    "dummy_page.html": {
-      type: "sub_frame",
-      status: 404,
-    },
-    "badrobot": {
-      type: "sub_frame",
-      status: 404,
-      events: ["onBeforeRequest", "onBeforeSendHeaders", "onSendHeaders", "onErrorOccurred"],
-    },
-  };
-  extension.sendMessage("set-expected", {expect, origin: location.href});
-  yield extension.awaitMessage("continue");
-  addFrame("data:text/plain,webRequestTest");
-  addFrame("data:text/plain,webRequestTest_bad");
-  yield extension.awaitMessage("cancelled");
-  addFrame("redirection.sjs");
-  addFrame("https://invalid.localhost/badrobot");
-  yield extension.awaitMessage("done");
-});
-
-add_task(function* teardown() {
-  yield extension.unload();
-});
-</script>
-</head>
-<body>
-<div id="test">Sample text</div>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_suspend.html b/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_suspend.html
deleted file mode 100644
index c8423ec7c..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_suspend.html
+++ /dev/null
@@ -1,216 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for simple WebExtension</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_suspend() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "webRequestBlocking",
-      ],
-    },
-
-    background() {
-      browser.webRequest.onBeforeSendHeaders.addListener(
-        details => {
-          // Make sure that returning undefined or a promise that resolves to
-          // undefined does not break later handlers.
-        },
-        {urls: ["<all_urls>"]},
-        ["blocking", "requestHeaders"]);
-
-      browser.webRequest.onBeforeSendHeaders.addListener(
-        details => {
-          return Promise.resolve();
-        },
-        {urls: ["<all_urls>"]},
-        ["blocking", "requestHeaders"]);
-
-      browser.webRequest.onBeforeSendHeaders.addListener(
-        details => {
-          let requestHeaders = details.requestHeaders.concat({name: "Foo", value: "Bar"});
-
-          return new Promise(resolve => {
-            setTimeout(resolve, 500);
-          }).then(() => {
-            return {requestHeaders};
-          });
-        },
-        {urls: ["<all_urls>"]},
-        ["blocking", "requestHeaders"]);
-    },
-  });
-
-  yield extension.startup();
-
-  let result = yield fetch(SimpleTest.getTestFileURL("return_headers.sjs"));
-
-  let headers = JSON.parse(yield result.text());
-
-  is(headers.foo, "Bar", "Request header was correctly set on suspended request");
-
-  yield extension.unload();
-});
-
-
-// Test that requests that were canceled while suspended for a blocking
-// listener are correctly resumed.
-add_task(function* test_error_resume() {
-  let chromeScript = SpecialPowers.loadChromeScript(() => {
-    const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
-    Cu.import("resource://gre/modules/Services.jsm");
-
-    let observer = channel => {
-      if (channel instanceof Ci.nsIHttpChannel && channel.URI.spec === "http://example.com/") {
-        Services.obs.removeObserver(observer, "http-on-modify-request");
-
-        // Wait until the next tick to make sure this runs after WebRequest observers.
-        Promise.resolve().then(() => {
-          channel.cancel(Cr.NS_BINDING_ABORTED);
-        });
-      }
-    };
-
-    Services.obs.addObserver(observer, "http-on-modify-request", false);
-  });
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "webRequestBlocking",
-      ],
-    },
-
-    background() {
-      browser.webRequest.onBeforeSendHeaders.addListener(
-        details => {
-          browser.test.log(`onBeforeSendHeaders({url: ${details.url}})`);
-
-          if (details.url === "http://example.com/") {
-            browser.test.sendMessage("got-before-send-headers");
-          }
-        },
-        {urls: ["<all_urls>"]},
-        ["blocking"]);
-
-      browser.webRequest.onErrorOccurred.addListener(
-        details => {
-          browser.test.log(`onErrorOccurred({url: ${details.url}})`);
-
-          if (details.url === "http://example.com/") {
-            browser.test.sendMessage("got-error-occurred");
-          }
-        },
-        {urls: ["<all_urls>"]});
-    },
-  });
-
-  yield extension.startup();
-
-  try {
-    yield fetch("http://example.com/");
-    ok(false, "Fetch should have failed.");
-  } catch (e) {
-    ok(true, "Got expected error.");
-  }
-
-  yield extension.awaitMessage("got-before-send-headers");
-  yield extension.awaitMessage("got-error-occurred");
-
-  yield extension.unload();
-  chromeScript.destroy();
-});
-
-
-// Test that response header modifications take effect before onStartRequest fires.
-add_task(function* test_set_responseHeaders() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "webRequestBlocking",
-        "http://example.com/",
-      ],
-    },
-
-    background() {
-      browser.webRequest.onHeadersReceived.addListener(
-        details => {
-          browser.test.log(`onHeadersReceived({url: ${details.url}})`);
-
-          details.responseHeaders.push({name: "foo", value: "bar"});
-
-          return {responseHeaders: details.responseHeaders};
-        },
-        {urls: ["http://example.com/?modify_headers"]},
-        ["blocking", "responseHeaders"]);
-    },
-  });
-
-  yield extension.startup();
-
-  yield new Promise(resolve => setTimeout(resolve, 0));
-
-  let chromeScript = SpecialPowers.loadChromeScript(() => {
-    const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
-
-    Cu.import("resource://gre/modules/NetUtil.jsm");
-    Cu.import("resource://gre/modules/Services.jsm");
-    Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-
-    let ssm = Services.scriptSecurityManager;
-
-    let channel = NetUtil.newChannel({
-      uri: "http://example.com/?modify_headers",
-      loadingPrincipal: ssm.createCodebasePrincipalFromOrigin("http://example.com"),
-      contentPolicyType: Ci.nsIContentPolicy.TYPE_XMLHTTPREQUEST,
-      securityFlags: Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
-    });
-
-    channel.asyncOpen2({
-      QueryInterface: XPCOMUtils.generateQI([Ci.nsIStreamListener]),
-
-      onStartRequest(request, context) {
-        request.QueryInterface(Ci.nsIHttpChannel);
-
-        try {
-          sendAsyncMessage("response-header-foo", request.getResponseHeader("foo"));
-        } catch (e) {
-          sendAsyncMessage("response-header-foo", null);
-        }
-        request.cancel(Cr.NS_BINDING_ABORTED);
-      },
-
-      onStopRequest() {
-      },
-
-      onDataAvailable() {
-        throw new Components.Exception("", Cr.NS_ERROR_FAILURE);
-      },
-    });
-  });
-
-  let headerValue = yield chromeScript.promiseOneMessage("response-header-foo");
-  is(headerValue, "bar", "Expected Foo header value");
-
-  yield extension.unload();
-  chromeScript.destroy();
-});
-
-
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_upload.html b/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_upload.html
deleted file mode 100644
index 998ab9800..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_webrequest_upload.html
+++ /dev/null
@@ -1,199 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<form method="post"
-  action="file_WebRequest_page3.html?trigger=form"
-  target="_blank"
-  enctype="multipart/form-data"
-  >
-<input type="text" name="&quot;special&quot; chˆrs" value="spÛcial">
-<input type="file" name="testFile">
-<input type="file" name="emptyFile">
-<input type="text" name="textInput1" value="value1">
-</form>
-
-<form method="post"
-  action="file_WebRequest_page3.html?trigger=form"
-  target="_blank"
-  enctype="multipart/form-data"
-  >
-<input type="text" name="textInput2" value="value2">
-<input type="file" name="testFile">
-<input type="file" name="emptyFile">
-</form>
-
-</form>
-<form method="post"
-  action="file_WebRequest_page3.html?trigger=form"
-  target="_blank"
-  >
-<input type="text" name="textInput" value="value1">
-<input type="text" name="textInput" value="value2">
-</form>
-<script>
-"use strict";
-
-let files, testFile, blob, file, uploads;
-add_task(function* test_setup() {
-  files = yield new Promise(resolve => {
-    SpecialPowers.createFiles([{name: "testFile.pdf", data: "Not really a PDF file :)", "type": "application/x-pdf"}], (result) => {
-      resolve(result);
-    });
-  });
-  testFile = files[0];
-  blob = {
-    name: "blobAsFile",
-    content: new Blob(["A blob sent as a file"], {type: "text/csv"}),
-    fileName: "blobAsFile.csv",
-  };
-  file = {
-    name: "testFile",
-    fileName: testFile.name,
-  };
-  uploads = {
-    [blob.name]: blob,
-    [file.name]: file,
-  };
-});
-
-function background() {
-  const FILTERS = {urls: ["<all_urls>"]};
-
-  let requestBodySupported = true;
-
-  function onUpload(details) {
-    let url = new URL(details.url);
-    let upload = url.searchParams.get("upload");
-    if (!upload || !requestBodySupported) {
-      return;
-    }
-    let requestBody = details.requestBody;
-    browser.test.log(`onBeforeRequest upload: ${details.url} ${JSON.stringify(details.requestBody)}`);
-    browser.test.assertTrue(!!requestBody, `Intercepted upload ${details.url} #${details.requestId} ${upload} have a requestBody`);
-    if (!requestBody) {
-      return;
-    }
-    let byteLength = parseInt(upload, 10);
-    if (byteLength) {
-      browser.test.assertTrue(!!requestBody.raw, `Binary upload ${details.url} #${details.requestId} ${upload} have a raw attribute`);
-      browser.test.assertEq(byteLength, requestBody.raw && requestBody.raw.map(r => r.bytes && r.bytes.byteLength || 0).reduce((a, b) => a + b), `Binary upload size matches`);
-      return;
-    }
-    if ("raw" in requestBody) {
-      browser.test.assertEq(upload, JSON.stringify(requestBody.raw).replace(/(\bfile: ")[^"]+/, "$1<file>"), `Upload ${details.url} #${details.requestId} matches raw data`);
-    } else {
-      browser.test.assertEq(upload, JSON.stringify(requestBody.formData), `Upload ${details.url} #${details.requestId} matches form data.`);
-    }
-  }
-
-  browser.webRequest.onCompleted.addListener(
-    details => {
-      browser.test.log(`onCompleted ${details.requestId} ${details.url}`);
-
-      browser.test.sendMessage("done");
-    },
-    FILTERS);
-
-  let onBeforeRequest = details => {
-    browser.test.log(`${name} ${details.requestId} ${details.url}`);
-
-    onUpload(details);
-  };
-
-  try {
-    browser.webRequest.onBeforeRequest.addListener(
-      onBeforeRequest, FILTERS, ["requestBody"]);
-  } catch (e) {
-    browser.test.assertTrue(/\brequestBody\b/.test(e.message),
-                            "Request body is unsupported");
-
-    // requestBody is disabled in release builds
-    if (!/\brequestBody\b/.test(e.message)) {
-      throw e;
-    }
-
-    browser.webRequest.onBeforeRequest.addListener(
-      onBeforeRequest, FILTERS);
-  }
-}
-
-add_task(function* test_xhr_forms() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: [
-        "webRequest",
-        "webRequestBlocking",
-        "<all_urls>",
-      ],
-    },
-    background,
-  });
-
-  yield extension.startup();
-
-  for (let form of document.forms) {
-    if (file.name in form.elements) {
-      SpecialPowers.wrap(form.elements[file.name]).mozSetFileArray(files);
-    }
-    let action = new URL(form.action);
-    let formData = new FormData(form);
-    let webRequestFD = {};
-
-    let updateActionURL = () => {
-      for (let name of formData.keys()) {
-        webRequestFD[name] = name in uploads ? [uploads[name].fileName] : formData.getAll(name);
-      }
-      action.searchParams.set("upload", JSON.stringify(webRequestFD));
-      action.searchParams.set("enctype", form.enctype);
-    };
-
-    updateActionURL();
-
-    form.action = action;
-    form.submit();
-    yield extension.awaitMessage("done");
-
-    if (form.enctype !== "multipart/form-data") {
-      continue;
-    }
-
-    let post = (data) => {
-      let xhr = new XMLHttpRequest();
-      action.searchParams.set("xhr", "1");
-      xhr.open("POST", action.href);
-      xhr.send(data);
-      action.searchParams.delete("xhr");
-      return extension.awaitMessage("done");
-    };
-
-    formData.append(blob.name, blob.content, blob.fileName);
-    formData.append("formDataField", "some value");
-    updateActionURL();
-    yield post(formData);
-
-    action.searchParams.set("upload", JSON.stringify([{file: "<file>"}]));
-    yield post(testFile);
-
-    action.searchParams.set("upload", `${blob.content.size} bytes`);
-    yield post(blob.content);
-
-    let byteLength = 16;
-    action.searchParams.set("upload", `${byteLength} bytes`);
-    yield post(new ArrayBuffer(byteLength));
-  }
-
-  yield extension.unload();
-});
-</script>
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_window_postMessage.html b/toolkit/components/webextensions/test/mochitest/test_ext_window_postMessage.html
deleted file mode 100644
index 7d49d55ba..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_window_postMessage.html
+++ /dev/null
@@ -1,105 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for content script</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-/* eslint-disable mozilla/balanced-listeners */
-
-add_task(function* test_postMessage() {
-  let extensionData = {
-    manifest: {
-      content_scripts: [
-        {
-          "matches": ["http://mochi.test/*/file_sample.html"],
-          "js": ["content_script.js"],
-          "run_at": "document_start",
-          "all_frames": true,
-        },
-      ],
-
-      web_accessible_resources: ["iframe.html"],
-    },
-
-    background() {
-      browser.test.sendMessage("iframe-url", browser.runtime.getURL("iframe.html"));
-    },
-
-    files: {
-      "content_script.js": function() {
-        window.addEventListener("message", event => {
-          if (event.data == "ping") {
-            event.source.postMessage({pong: location.href},
-                                     event.origin);
-          }
-        });
-      },
-
-      "iframe.html": `<!DOCTYPE html>
-        <html>
-          <head>
-            <meta charset="utf-8">
-            <script src="content_script.js"><\/script>
-          </head>
-        </html>`,
-    },
-  };
-
-  let createIframe = url => {
-    let iframe = document.createElement("iframe");
-    return new Promise(resolve => {
-      iframe.src = url;
-      iframe.onload = resolve;
-      document.body.appendChild(iframe);
-    }).then(() => {
-      return iframe;
-    });
-  };
-
-  let awaitMessage = () => {
-    return new Promise(resolve => {
-      let listener = event => {
-        if (event.data.pong) {
-          window.removeEventListener("message", listener);
-          resolve(event.data);
-        }
-      };
-      window.addEventListener("message", listener);
-    });
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  let iframeURL = yield extension.awaitMessage("iframe-url");
-  let testURL = SimpleTest.getTestFileURL("file_sample.html");
-
-  for (let url of [iframeURL, testURL]) {
-    info(`Testing URL ${url}`);
-
-    let iframe = yield createIframe(url);
-
-    iframe.contentWindow.postMessage(
-      "ping", url);
-
-    let pong = yield awaitMessage();
-    is(pong.pong, url, "Got expected pong");
-
-    iframe.remove();
-  }
-
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_xhr_capabilities.html b/toolkit/components/webextensions/test/mochitest/test_ext_xhr_capabilities.html
deleted file mode 100644
index 1afdadb9f..000000000
--- a/toolkit/components/webextensions/test/mochitest/test_ext_xhr_capabilities.html
+++ /dev/null
@@ -1,86 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test XHR capabilities</title>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
-  <script type="text/javascript" src="head.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<script type="text/javascript">
-"use strict";
-
-add_task(function* test_xhr_capabilities() {
-  function backgroundScript() {
-    let xhr = new XMLHttpRequest();
-    xhr.open("GET", browser.extension.getURL("bad.xml"));
-
-    browser.test.sendMessage("result",
-      {name: "Background script XHRs should not be privileged",
-       result: xhr.channel === undefined});
-
-    xhr.onload = () => {
-      browser.test.sendMessage("result",
-        {name: "Background script XHRs should not yield <parsererrors>",
-         result: xhr.responseXML === null});
-    };
-    xhr.send();
-  }
-
-  function contentScript() {
-    let xhr = new XMLHttpRequest();
-    xhr.open("GET", browser.extension.getURL("bad.xml"));
-
-    browser.test.sendMessage("result",
-      {name: "Content script XHRs should not be privileged",
-       result: xhr.channel === undefined});
-
-    xhr.onload = () => {
-      browser.test.sendMessage("result",
-        {name: "Content script XHRs should not yield <parsererrors>",
-         result: xhr.responseXML === null});
-    };
-    xhr.send();
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      background: {
-        "scripts": ["background.js"],
-      },
-      content_scripts: [{
-        "matches": ["http://example.com/"],
-        "js": ["content_script.js"],
-      }],
-      web_accessible_resources: [
-        "bad.xml",
-      ],
-    },
-
-    files: {
-      "bad.xml": "<xml",
-      "background.js": `(${backgroundScript})()`,
-      "content_script.js": `(${contentScript})()`,
-    },
-  });
-
-  yield extension.startup();
-
-  let win = window.open("http://example.com/");
-
-  // We expect four test results from the content/background scripts.
-  for (let i = 0; i < 4; ++i) {
-    let result = yield extension.awaitMessage("result");
-    ok(result.result, result.name);
-  }
-
-  win.close();
-  yield extension.unload();
-});
-</script>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/mochitest/webrequest_chromeworker.js b/toolkit/components/webextensions/test/mochitest/webrequest_chromeworker.js
deleted file mode 100644
index ccfb2ac1f..000000000
--- a/toolkit/components/webextensions/test/mochitest/webrequest_chromeworker.js
+++ /dev/null
@@ -1,8 +0,0 @@
-"use strict";
-
-onmessage = function(event) {
-  fetch("https://example.com/example.txt").then(() => {
-    postMessage("Done!");
-  });
-};
-
diff --git a/toolkit/components/webextensions/test/mochitest/webrequest_test.jsm b/toolkit/components/webextensions/test/mochitest/webrequest_test.jsm
deleted file mode 100644
index bfb148301..000000000
--- a/toolkit/components/webextensions/test/mochitest/webrequest_test.jsm
+++ /dev/null
@@ -1,22 +0,0 @@
-"use strict";
-
-this.EXPORTED_SYMBOLS = ["webrequest_test"];
-
-Components.utils.importGlobalProperties(["fetch", "XMLHttpRequest"]);
-
-this.webrequest_test = {
-  testFetch(url) {
-    return fetch(url);
-  },
-
-  testXHR(url) {
-    return new Promise(resolve => {
-      let xhr = new XMLHttpRequest();
-      xhr.open("HEAD", url);
-      xhr.onload = () => {
-        resolve();
-      };
-      xhr.send();
-    });
-  },
-};
diff --git a/toolkit/components/webextensions/test/mochitest/webrequest_worker.js b/toolkit/components/webextensions/test/mochitest/webrequest_worker.js
deleted file mode 100644
index dcffd0857..000000000
--- a/toolkit/components/webextensions/test/mochitest/webrequest_worker.js
+++ /dev/null
@@ -1,3 +0,0 @@
-"use strict";
-
-fetch("https://example.com/example.txt");
diff --git a/toolkit/components/webextensions/test/xpcshell/.eslintrc.js b/toolkit/components/webextensions/test/xpcshell/.eslintrc.js
deleted file mode 100644
index 3758537ef..000000000
--- a/toolkit/components/webextensions/test/xpcshell/.eslintrc.js
+++ /dev/null
@@ -1,9 +0,0 @@
-"use strict";
-
-module.exports = { // eslint-disable-line no-undef
-  "extends": "../../../../../testing/xpcshell/xpcshell.eslintrc.js",
-
-  "globals": {
-    "browser": false,
-  },
-};
diff --git a/toolkit/components/webextensions/test/xpcshell/data/file_download.html b/toolkit/components/webextensions/test/xpcshell/data/file_download.html
deleted file mode 100644
index d970c6325..000000000
--- a/toolkit/components/webextensions/test/xpcshell/data/file_download.html
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE HTML>
-
-<html>
-<head>
-<meta charset="utf-8">
-</head>
-<body>
-
-<div>Download HTML File</div>
-
-</body>
-</html>
diff --git a/toolkit/components/webextensions/test/xpcshell/data/file_download.txt b/toolkit/components/webextensions/test/xpcshell/data/file_download.txt
deleted file mode 100644
index 6293c7af7..000000000
--- a/toolkit/components/webextensions/test/xpcshell/data/file_download.txt
+++ /dev/null
@@ -1 +0,0 @@
-This is a sample file used in download tests.
diff --git a/toolkit/components/webextensions/test/xpcshell/head.js b/toolkit/components/webextensions/test/xpcshell/head.js
deleted file mode 100644
index 9e22be6da..000000000
--- a/toolkit/components/webextensions/test/xpcshell/head.js
+++ /dev/null
@@ -1,111 +0,0 @@
-"use strict";
-
-const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
-
-/* exported createHttpServer, promiseConsoleOutput, cleanupDir */
-
-Components.utils.import("resource://gre/modules/Task.jsm");
-Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
-Components.utils.import("resource://gre/modules/Timer.jsm");
-Components.utils.import("resource://testing-common/AddonTestUtils.jsm");
-
-XPCOMUtils.defineLazyModuleGetter(this, "AppConstants",
-                                  "resource://gre/modules/AppConstants.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Extension",
-                                  "resource://gre/modules/Extension.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ExtensionData",
-                                  "resource://gre/modules/Extension.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ExtensionManagement",
-                                  "resource://gre/modules/ExtensionManagement.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ExtensionTestUtils",
-                                  "resource://testing-common/ExtensionXPCShellUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "FileUtils",
-                                  "resource://gre/modules/FileUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "HttpServer",
-                                  "resource://testing-common/httpd.js");
-XPCOMUtils.defineLazyModuleGetter(this, "NetUtil",
-                                  "resource://gre/modules/NetUtil.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Schemas",
-                                  "resource://gre/modules/Schemas.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Services",
-                                  "resource://gre/modules/Services.jsm");
-
-ExtensionTestUtils.init(this);
-
-/**
- * Creates a new HttpServer for testing, and begins listening on the
- * specified port. Automatically shuts down the server when the test
- * unit ends.
- *
- * @param {integer} [port]
- *        The port to listen on. If omitted, listen on a random
- *        port. The latter is the preferred behavior.
- *
- * @returns {HttpServer}
- */
-function createHttpServer(port = -1) {
-  let server = new HttpServer();
-  server.start(port);
-
-  do_register_cleanup(() => {
-    return new Promise(resolve => {
-      server.stop(resolve);
-    });
-  });
-
-  return server;
-}
-
-var promiseConsoleOutput = Task.async(function* (task) {
-  const DONE = `=== console listener ${Math.random()} done ===`;
-
-  let listener;
-  let messages = [];
-  let awaitListener = new Promise(resolve => {
-    listener = msg => {
-      if (msg == DONE) {
-        resolve();
-      } else {
-        void (msg instanceof Ci.nsIConsoleMessage);
-        messages.push(msg);
-      }
-    };
-  });
-
-  Services.console.registerListener(listener);
-  try {
-    let result = yield task();
-
-    Services.console.logStringMessage(DONE);
-    yield awaitListener;
-
-    return {messages, result};
-  } finally {
-    Services.console.unregisterListener(listener);
-  }
-});
-
-// Attempt to remove a directory.  If the Windows OS is still using the
-// file sometimes remove() will fail.  So try repeatedly until we can
-// remove it or we give up.
-function cleanupDir(dir) {
-  let count = 0;
-  return new Promise((resolve, reject) => {
-    function tryToRemoveDir() {
-      count += 1;
-      try {
-        dir.remove(true);
-      } catch (e) {
-        // ignore
-      }
-      if (!dir.exists()) {
-        return resolve();
-      }
-      if (count >= 25) {
-        return reject(`Failed to cleanup directory: ${dir}`);
-      }
-      setTimeout(tryToRemoveDir, 100);
-    }
-    tryToRemoveDir();
-  });
-}
diff --git a/toolkit/components/webextensions/test/xpcshell/head_native_messaging.js b/toolkit/components/webextensions/test/xpcshell/head_native_messaging.js
deleted file mode 100644
index f7c619b76..000000000
--- a/toolkit/components/webextensions/test/xpcshell/head_native_messaging.js
+++ /dev/null
@@ -1,131 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-/* globals AppConstants, FileUtils */
-/* exported getSubprocessCount, setupHosts, waitForSubprocessExit */
-
-XPCOMUtils.defineLazyModuleGetter(this, "MockRegistry",
-                                  "resource://testing-common/MockRegistry.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "OS",
-                                  "resource://gre/modules/osfile.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "setTimeout",
-                                  "resource://gre/modules/Timer.jsm");
-
-let {Subprocess, SubprocessImpl} = Cu.import("resource://gre/modules/Subprocess.jsm");
-
-
-// It's important that we use a space in this directory name to make sure we
-// correctly handle executing batch files with spaces in their path.
-let tmpDir = FileUtils.getDir("TmpD", ["Native Messaging"]);
-tmpDir.createUnique(Ci.nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-
-do_register_cleanup(() => {
-  tmpDir.remove(true);
-});
-
-function getPath(filename) {
-  return OS.Path.join(tmpDir.path, filename);
-}
-
-const ID = "native@tests.mozilla.org";
-
-
-function* setupHosts(scripts) {
-  const PERMS = {unixMode: 0o755};
-
-  const env = Cc["@mozilla.org/process/environment;1"].getService(Ci.nsIEnvironment);
-  const pythonPath = yield Subprocess.pathSearch(env.get("PYTHON"));
-
-  function* writeManifest(script, scriptPath, path) {
-    let body = `#!${pythonPath} -u\n${script.script}`;
-
-    yield OS.File.writeAtomic(scriptPath, body);
-    yield OS.File.setPermissions(scriptPath, PERMS);
-
-    let manifest = {
-      name: script.name,
-      description: script.description,
-      path,
-      type: "stdio",
-      allowed_extensions: [ID],
-    };
-
-    let manifestPath = getPath(`${script.name}.json`);
-    yield OS.File.writeAtomic(manifestPath, JSON.stringify(manifest));
-
-    return manifestPath;
-  }
-
-  switch (AppConstants.platform) {
-    case "macosx":
-    case "linux":
-      let dirProvider = {
-        getFile(property) {
-          if (property == "XREUserNativeMessaging") {
-            return tmpDir.clone();
-          } else if (property == "XRESysNativeMessaging") {
-            return tmpDir.clone();
-          }
-          return null;
-        },
-      };
-
-      Services.dirsvc.registerProvider(dirProvider);
-      do_register_cleanup(() => {
-        Services.dirsvc.unregisterProvider(dirProvider);
-      });
-
-      for (let script of scripts) {
-        let path = getPath(`${script.name}.py`);
-
-        yield writeManifest(script, path, path);
-      }
-      break;
-
-    case "win":
-      const REGKEY = String.raw`Software\Mozilla\NativeMessagingHosts`;
-
-      let registry = new MockRegistry();
-      do_register_cleanup(() => {
-        registry.shutdown();
-      });
-
-      for (let script of scripts) {
-        // It's important that we use a space in this filename. See directory
-        // name comment above.
-        let batPath = getPath(`batch ${script.name}.bat`);
-        let scriptPath = getPath(`${script.name}.py`);
-
-        let batBody = `@ECHO OFF\n${pythonPath} -u "${scriptPath}" %*\n`;
-        yield OS.File.writeAtomic(batPath, batBody);
-
-        // Create absolute and relative path versions of the entry.
-        for (let [name, path] of [[script.name, batPath],
-                                  [`relative.${script.name}`, OS.Path.basename(batPath)]]) {
-          script.name = name;
-          let manifestPath = yield writeManifest(script, scriptPath, path);
-
-          registry.setValue(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
-                            `${REGKEY}\\${script.name}`, "", manifestPath);
-        }
-      }
-      break;
-
-    default:
-      ok(false, `Native messaging is not supported on ${AppConstants.platform}`);
-  }
-}
-
-
-function getSubprocessCount() {
-  return SubprocessImpl.Process.getWorker().call("getProcesses", [])
-                       .then(result => result.size);
-}
-function waitForSubprocessExit() {
-  return SubprocessImpl.Process.getWorker().call("waitForNoProcesses", []).then(() => {
-    // Return to the main event loop to give IO handlers enough time to consume
-    // their remaining buffered input.
-    return new Promise(resolve => setTimeout(resolve, 0));
-  });
-}
diff --git a/toolkit/components/webextensions/test/xpcshell/head_sync.js b/toolkit/components/webextensions/test/xpcshell/head_sync.js
deleted file mode 100644
index 9b66b78e7..000000000
--- a/toolkit/components/webextensions/test/xpcshell/head_sync.js
+++ /dev/null
@@ -1,67 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-/* exported withSyncContext */
-
-Components.utils.import("resource://gre/modules/Services.jsm", this);
-Components.utils.import("resource://gre/modules/ExtensionCommon.jsm", this);
-
-var {
-  BaseContext,
-} = ExtensionCommon;
-
-class Context extends BaseContext {
-  constructor(principal) {
-    super();
-    Object.defineProperty(this, "principal", {
-      value: principal,
-      configurable: true,
-    });
-    this.sandbox = Components.utils.Sandbox(principal, {wantXrays: false});
-    this.extension = {id: "test@web.extension"};
-  }
-
-  get cloneScope() {
-    return this.sandbox;
-  }
-}
-
-/**
- * Call the given function with a newly-constructed context.
- * Unload the context on the way out.
- *
- * @param {function} f    the function to call
- */
-function* withContext(f) {
-  const ssm = Services.scriptSecurityManager;
-  const PRINCIPAL1 = ssm.createCodebasePrincipalFromOrigin("http://www.example.org");
-  const context = new Context(PRINCIPAL1);
-  try {
-    yield* f(context);
-  } finally {
-    yield context.unload();
-  }
-}
-
-/**
- * Like withContext(), but also turn on the "storage.sync" pref for
- * the duration of the function.
- * Calls to this function can be replaced with calls to withContext
- * once the pref becomes on by default.
- *
- * @param {function} f    the function to call
- */
-function* withSyncContext(f) {
-  const STORAGE_SYNC_PREF = "webextensions.storage.sync.enabled";
-  let prefs = Services.prefs;
-
-  try {
-    prefs.setBoolPref(STORAGE_SYNC_PREF, true);
-    yield* withContext(f);
-  } finally {
-    prefs.clearUserPref(STORAGE_SYNC_PREF);
-  }
-}
diff --git a/toolkit/components/webextensions/test/xpcshell/native_messaging.ini b/toolkit/components/webextensions/test/xpcshell/native_messaging.ini
deleted file mode 100644
index d0e1da163..000000000
--- a/toolkit/components/webextensions/test/xpcshell/native_messaging.ini
+++ /dev/null
@@ -1,13 +0,0 @@
-[DEFAULT]
-head = head.js head_native_messaging.js
-tail =
-firefox-appdir = browser
-skip-if = appname == "thunderbird" || os == "android"
-subprocess = true
-support-files =
-  data/**
-tags = webextensions
-
-[test_ext_native_messaging.js]
-[test_ext_native_messaging_perf.js]
-[test_ext_native_messaging_unresponsive.js]
diff --git a/toolkit/components/webextensions/test/xpcshell/test_csp_custom_policies.js b/toolkit/components/webextensions/test/xpcshell/test_csp_custom_policies.js
deleted file mode 100644
index b6213baac..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_csp_custom_policies.js
+++ /dev/null
@@ -1,38 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://gre/modules/Preferences.jsm");
-
-const ADDON_ID = "test@web.extension";
-
-const aps = Cc["@mozilla.org/addons/policy-service;1"]
-  .getService(Ci.nsIAddonPolicyService).wrappedJSObject;
-
-do_register_cleanup(() => {
-  aps.setAddonCSP(ADDON_ID, null);
-});
-
-add_task(function* test_addon_csp() {
-  equal(aps.baseCSP, Preferences.get("extensions.webextensions.base-content-security-policy"),
-        "Expected base CSP value");
-
-  equal(aps.defaultCSP, Preferences.get("extensions.webextensions.default-content-security-policy"),
-        "Expected default CSP value");
-
-  equal(aps.getAddonCSP(ADDON_ID), aps.defaultCSP,
-        "CSP for unknown add-on ID should be the default CSP");
-
-
-  const CUSTOM_POLICY = "script-src: 'self' https://xpcshell.test.custom.csp; object-src: 'none'";
-
-  aps.setAddonCSP(ADDON_ID, CUSTOM_POLICY);
-
-  equal(aps.getAddonCSP(ADDON_ID), CUSTOM_POLICY, "CSP should point to add-on's custom policy");
-
-
-  aps.setAddonCSP(ADDON_ID, null);
-
-  equal(aps.getAddonCSP(ADDON_ID), aps.defaultCSP,
-        "CSP should revert to default when set to null");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_csp_validator.js b/toolkit/components/webextensions/test/xpcshell/test_csp_validator.js
deleted file mode 100644
index 59a7322bc..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_csp_validator.js
+++ /dev/null
@@ -1,85 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-const cps = Cc["@mozilla.org/addons/content-policy;1"].getService(Ci.nsIAddonContentPolicy);
-
-add_task(function* test_csp_validator() {
-  let checkPolicy = (policy, expectedResult, message = null) => {
-    do_print(`Checking policy: ${policy}`);
-
-    let result = cps.validateAddonCSP(policy);
-    equal(result, expectedResult);
-  };
-
-  checkPolicy("script-src 'self'; object-src 'self';",
-              null);
-
-  let hash = "'sha256-NjZhMDQ1YjQ1MjEwMmM1OWQ4NDBlYzA5N2Q1OWQ5NDY3ZTEzYTNmMzRmNjQ5NGU1MzlmZmQzMmMxYmIzNWYxOCAgLQo='";
-
-  checkPolicy(`script-src 'self' https://com https://*.example.com moz-extension://09abcdef blob: filesystem: ${hash} 'unsafe-eval'; ` +
-              `object-src 'self' https://com https://*.example.com moz-extension://09abcdef blob: filesystem: ${hash}`,
-              null);
-
-  checkPolicy("",
-              "Policy is missing a required \u2018script-src\u2019 directive");
-
-  checkPolicy("object-src 'none';",
-              "Policy is missing a required \u2018script-src\u2019 directive");
-
-
-  checkPolicy("default-src 'self'", null,
-              "A valid default-src should count as a valid script-src or object-src");
-
-  checkPolicy("default-src 'self'; script-src 'self'", null,
-              "A valid default-src should count as a valid script-src or object-src");
-
-  checkPolicy("default-src 'self'; object-src 'self'", null,
-              "A valid default-src should count as a valid script-src or object-src");
-
-
-  checkPolicy("default-src 'self'; script-src http://example.com",
-              "\u2018script-src\u2019 directive contains a forbidden http: protocol source",
-              "A valid default-src should not allow an invalid script-src directive");
-
-  checkPolicy("default-src 'self'; object-src http://example.com",
-              "\u2018object-src\u2019 directive contains a forbidden http: protocol source",
-              "A valid default-src should not allow an invalid object-src directive");
-
-
-  checkPolicy("script-src 'self';",
-              "Policy is missing a required \u2018object-src\u2019 directive");
-
-  checkPolicy("script-src 'none'; object-src 'none'",
-              "\u2018script-src\u2019 must include the source 'self'");
-
-  checkPolicy("script-src 'self'; object-src 'none';",
-              null);
-
-  checkPolicy("script-src 'self' 'unsafe-inline'; object-src 'self';",
-              "\u2018script-src\u2019 directive contains a forbidden 'unsafe-inline' keyword");
-
-
-  let directives = ["script-src", "object-src"];
-
-  for (let [directive, other] of [directives, directives.slice().reverse()]) {
-    for (let src of ["https://*", "https://*.blogspot.com", "https://*"]) {
-      checkPolicy(`${directive} 'self' ${src}; ${other} 'self';`,
-                  `https: wildcard sources in \u2018${directive}\u2019 directives must include at least one non-generic sub-domain (e.g., *.example.com rather than *.com)`);
-    }
-
-    checkPolicy(`${directive} 'self' https:; ${other} 'self';`,
-                `https: protocol requires a host in \u2018${directive}\u2019 directives`);
-
-    checkPolicy(`${directive} 'self' http://example.com; ${other} 'self';`,
-                `\u2018${directive}\u2019 directive contains a forbidden http: protocol source`);
-
-    for (let protocol of ["http", "ftp", "meh"]) {
-      checkPolicy(`${directive} 'self' ${protocol}:; ${other} 'self';`,
-                  `\u2018${directive}\u2019 directive contains a forbidden ${protocol}: protocol source`);
-    }
-
-    checkPolicy(`${directive} 'self' 'nonce-01234'; ${other} 'self';`,
-                `\u2018${directive}\u2019 directive contains a forbidden 'nonce-*' keyword`);
-  }
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms.js b/toolkit/components/webextensions/test/xpcshell/test_ext_alarms.js
deleted file mode 100644
index 936c984c6..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms.js
+++ /dev/null
@@ -1,210 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_alarm_without_permissions() {
-  function backgroundScript() {
-    browser.test.assertTrue(!browser.alarms,
-                            "alarm API is not available when the alarm permission is not required");
-    browser.test.notifyPass("alarms_permission");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: [],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarms_permission");
-  yield extension.unload();
-});
-
-
-add_task(function* test_alarm_fires() {
-  function backgroundScript() {
-    let ALARM_NAME = "test_ext_alarms";
-    let timer;
-
-    browser.alarms.onAlarm.addListener(alarm => {
-      browser.test.assertEq(ALARM_NAME, alarm.name, "alarm has the correct name");
-      clearTimeout(timer);
-      browser.test.notifyPass("alarm-fires");
-    });
-
-    browser.alarms.create(ALARM_NAME, {delayInMinutes: 0.02});
-
-    timer = setTimeout(async () => {
-      browser.test.fail("alarm fired within expected time");
-      let wasCleared = await browser.alarms.clear(ALARM_NAME);
-      browser.test.assertTrue(wasCleared, "alarm was cleared");
-      browser.test.notifyFail("alarm-fires");
-    }, 10000);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-fires");
-  yield extension.unload();
-});
-
-
-add_task(function* test_alarm_fires_with_when() {
-  function backgroundScript() {
-    let ALARM_NAME = "test_ext_alarms";
-    let timer;
-
-    browser.alarms.onAlarm.addListener(alarm => {
-      browser.test.assertEq(ALARM_NAME, alarm.name, "alarm has the expected name");
-      clearTimeout(timer);
-      browser.test.notifyPass("alarm-when");
-    });
-
-    browser.alarms.create(ALARM_NAME, {when: Date.now() + 1000});
-
-    timer = setTimeout(async () => {
-      browser.test.fail("alarm fired within expected time");
-      let wasCleared = await browser.alarms.clear(ALARM_NAME);
-      browser.test.assertTrue(wasCleared, "alarm was cleared");
-      browser.test.notifyFail("alarm-when");
-    }, 10000);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-when");
-  yield extension.unload();
-});
-
-
-add_task(function* test_alarm_clear_non_matching_name() {
-  async function backgroundScript() {
-    let ALARM_NAME = "test_ext_alarms";
-
-    browser.alarms.create(ALARM_NAME, {when: Date.now() + 2000});
-
-    let wasCleared = await browser.alarms.clear(ALARM_NAME + "1");
-    browser.test.assertFalse(wasCleared, "alarm was not cleared");
-
-    let alarms = await browser.alarms.getAll();
-    browser.test.assertEq(1, alarms.length, "alarm was not removed");
-    browser.test.notifyPass("alarm-clear");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-clear");
-  yield extension.unload();
-});
-
-
-add_task(function* test_alarm_get_and_clear_single_argument() {
-  async function backgroundScript() {
-    browser.alarms.create({when: Date.now() + 2000});
-
-    let alarm = await browser.alarms.get();
-    browser.test.assertEq("", alarm.name, "expected alarm returned");
-
-    let wasCleared = await browser.alarms.clear();
-    browser.test.assertTrue(wasCleared, "alarm was cleared");
-
-    let alarms = await browser.alarms.getAll();
-    browser.test.assertEq(0, alarms.length, "alarm was removed");
-
-    browser.test.notifyPass("alarm-single-arg");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-single-arg");
-  yield extension.unload();
-});
-
-
-add_task(function* test_get_get_all_clear_all_alarms() {
-  async function backgroundScript() {
-    const ALARM_NAME = "test_alarm";
-
-    let suffixes = [0, 1, 2];
-
-    for (let suffix of suffixes) {
-      browser.alarms.create(ALARM_NAME + suffix, {when: Date.now() + (suffix + 1) * 10000});
-    }
-
-    let alarms = await browser.alarms.getAll();
-    browser.test.assertEq(suffixes.length, alarms.length, "expected number of alarms were found");
-    alarms.forEach((alarm, index) => {
-      browser.test.assertEq(ALARM_NAME + index, alarm.name, "alarm has the expected name");
-    });
-
-
-    for (let suffix of suffixes) {
-      let alarm = await browser.alarms.get(ALARM_NAME + suffix);
-      browser.test.assertEq(ALARM_NAME + suffix, alarm.name, "alarm has the expected name");
-      browser.test.sendMessage(`get-${suffix}`);
-    }
-
-    let wasCleared = await browser.alarms.clear(ALARM_NAME + suffixes[0]);
-    browser.test.assertTrue(wasCleared, "alarm was cleared");
-
-    alarms = await browser.alarms.getAll();
-    browser.test.assertEq(2, alarms.length, "alarm was removed");
-
-    let alarm = await browser.alarms.get(ALARM_NAME + suffixes[0]);
-    browser.test.assertEq(undefined, alarm, "non-existent alarm is undefined");
-    browser.test.sendMessage(`get-invalid`);
-
-    wasCleared = await browser.alarms.clearAll();
-    browser.test.assertTrue(wasCleared, "alarms were cleared");
-
-    alarms = await browser.alarms.getAll();
-    browser.test.assertEq(0, alarms.length, "no alarms exist");
-    browser.test.sendMessage("clearAll");
-    browser.test.sendMessage("clear");
-    browser.test.sendMessage("getAll");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield Promise.all([
-    extension.startup(),
-    extension.awaitMessage("getAll"),
-    extension.awaitMessage("get-0"),
-    extension.awaitMessage("get-1"),
-    extension.awaitMessage("get-2"),
-    extension.awaitMessage("clear"),
-    extension.awaitMessage("get-invalid"),
-    extension.awaitMessage("clearAll"),
-  ]);
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_does_not_fire.js b/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_does_not_fire.js
deleted file mode 100644
index 11407b108..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_does_not_fire.js
+++ /dev/null
@@ -1,33 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_cleared_alarm_does_not_fire() {
-  async function backgroundScript() {
-    let ALARM_NAME = "test_ext_alarms";
-
-    browser.alarms.onAlarm.addListener(alarm => {
-      browser.test.fail("cleared alarm does not fire");
-      browser.test.notifyFail("alarm-cleared");
-    });
-    browser.alarms.create(ALARM_NAME, {when: Date.now() + 1000});
-
-    let wasCleared = await browser.alarms.clear(ALARM_NAME);
-    browser.test.assertTrue(wasCleared, "alarm was cleared");
-
-    await new Promise(resolve => setTimeout(resolve, 2000));
-
-    browser.test.notifyPass("alarm-cleared");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-cleared");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_periodic.js b/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_periodic.js
deleted file mode 100644
index 6bcdf4e33..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_periodic.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_periodic_alarm_fires() {
-  function backgroundScript() {
-    const ALARM_NAME = "test_ext_alarms";
-    let count = 0;
-    let timer;
-
-    browser.alarms.onAlarm.addListener(async alarm => {
-      browser.test.assertEq(alarm.name, ALARM_NAME, "alarm has the expected name");
-      if (count++ === 3) {
-        clearTimeout(timer);
-        let wasCleared = await browser.alarms.clear(ALARM_NAME);
-        browser.test.assertTrue(wasCleared, "alarm was cleared");
-
-        browser.test.notifyPass("alarm-periodic");
-      }
-    });
-
-    browser.alarms.create(ALARM_NAME, {periodInMinutes: 0.02});
-
-    timer = setTimeout(async () => {
-      browser.test.fail("alarm fired expected number of times");
-
-      let wasCleared = await browser.alarms.clear(ALARM_NAME);
-      browser.test.assertTrue(wasCleared, "alarm was cleared");
-
-      browser.test.notifyFail("alarm-periodic");
-    }, 30000);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-periodic");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_replaces.js b/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_replaces.js
deleted file mode 100644
index 96f61acb5..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_alarms_replaces.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-
-add_task(function* test_duplicate_alarm_name_replaces_alarm() {
-  function backgroundScript() {
-    let count = 0;
-
-    browser.alarms.onAlarm.addListener(async alarm => {
-      if (alarm.name === "master alarm") {
-        browser.alarms.create("child alarm", {delayInMinutes: 0.05});
-        let results = await browser.alarms.getAll();
-
-        browser.test.assertEq(2, results.length, "exactly two alarms exist");
-        browser.test.assertEq("master alarm", results[0].name, "first alarm has the expected name");
-        browser.test.assertEq("child alarm", results[1].name, "second alarm has the expected name");
-
-        if (count++ === 3) {
-          await browser.alarms.clear("master alarm");
-          await browser.alarms.clear("child alarm");
-
-          browser.test.notifyPass("alarm-duplicate");
-        }
-      } else {
-        browser.test.fail("duplicate named alarm replaced existing alarm");
-        browser.test.notifyFail("alarm-duplicate");
-      }
-    });
-
-    browser.alarms.create("master alarm", {delayInMinutes: 0.025, periodInMinutes: 0.025});
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["alarms"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("alarm-duplicate");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_api_permissions.js b/toolkit/components/webextensions/test/xpcshell/test_ext_api_permissions.js
deleted file mode 100644
index d653d0e7a..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_api_permissions.js
+++ /dev/null
@@ -1,64 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-let {Management} = Cu.import("resource://gre/modules/Extension.jsm", {});
-function getNextContext() {
-  return new Promise(resolve => {
-    Management.on("proxy-context-load", function listener(type, context) {
-      Management.off("proxy-context-load", listener);
-      resolve(context);
-    });
-  });
-}
-
-add_task(function* test_storage_api_without_permissions() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      // Force API initialization.
-      void browser.storage;
-    },
-
-    manifest: {
-      permissions: [],
-    },
-  });
-
-  let contextPromise = getNextContext();
-  yield extension.startup();
-
-  let context = yield contextPromise;
-
-  // Force API initialization.
-  void context.apiObj;
-
-  ok(!("storage" in context.apiObj),
-     "The storage API should not be initialized");
-
-  yield extension.unload();
-});
-
-add_task(function* test_storage_api_with_permissions() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      void browser.storage;
-    },
-
-    manifest: {
-      permissions: ["storage"],
-    },
-  });
-
-  let contextPromise = getNextContext();
-  yield extension.startup();
-
-  let context = yield contextPromise;
-
-  // Force API initialization.
-  void context.apiObj;
-
-  equal(typeof context.apiObj.storage, "object",
-        "The storage API should be initialized");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_apimanager.js b/toolkit/components/webextensions/test/xpcshell/test_ext_apimanager.js
deleted file mode 100644
index 3f6672a11..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_apimanager.js
+++ /dev/null
@@ -1,91 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-Cu.import("resource://gre/modules/ExtensionCommon.jsm");
-
-const {
-  SchemaAPIManager,
-} = ExtensionCommon;
-
-this.unknownvar = "Some module-global var";
-
-var gUniqueId = 0;
-
-// SchemaAPIManager's loadScript uses loadSubScript to load a script. This
-// requires a local (resource://) URL. So create such a temporary URL for
-// testing.
-function toLocalURI(code) {
-  let dataUrl = `data:charset=utf-8,${encodeURIComponent(code)}`;
-  let uniqueResPart = `need-a-local-uri-for-subscript-loading-${++gUniqueId}`;
-  Services.io.getProtocolHandler("resource")
-    .QueryInterface(Ci.nsIResProtocolHandler)
-    .setSubstitution(uniqueResPart, Services.io.newURI(dataUrl, null, null));
-  return `resource://${uniqueResPart}`;
-}
-
-add_task(function* test_global_isolation() {
-  let manA = new SchemaAPIManager("procA");
-  let manB = new SchemaAPIManager("procB");
-
-  // The "global" variable should be persistent and shared.
-  manA.loadScript(toLocalURI`global.globalVar = 1;`);
-  do_check_eq(manA.global.globalVar, 1);
-  do_check_eq(manA.global.unknownvar, undefined);
-  manA.loadScript(toLocalURI`global.canSeeGlobal = global.globalVar;`);
-  do_check_eq(manA.global.canSeeGlobal, 1);
-
-  // Each loadScript call should have their own scope, and global is shared.
-  manA.loadScript(toLocalURI`this.aVar = 1; global.thisScopeVar = aVar`);
-  do_check_eq(manA.global.aVar, undefined);
-  do_check_eq(manA.global.thisScopeVar, 1);
-  manA.loadScript(toLocalURI`global.differentScopeVar = this.aVar;`);
-  do_check_eq(manA.global.differentScopeVar, undefined);
-  manA.loadScript(toLocalURI`global.cantSeeOtherScope = typeof aVar;`);
-  do_check_eq(manA.global.cantSeeOtherScope, "undefined");
-
-  manB.loadScript(toLocalURI`global.tryReadOtherGlobal = global.tryagain;`);
-  do_check_eq(manA.global.tryReadOtherGlobal, undefined);
-
-  // Cu.import without second argument exports to the caller's global. Let's
-  // verify that it does not leak to the SchemaAPIManager's global.
-  do_check_eq(typeof ExtensionUtils, "undefined");  // Sanity check #1.
-  manA.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
-  do_check_eq(manA.global.hasExtUtils, "undefined");  // Sanity check #2
-
-  Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-  do_check_eq(typeof ExtensionUtils, "object");  // Sanity check #3.
-
-  manA.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
-  do_check_eq(manA.global.hasExtUtils, "undefined");
-  manB.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
-  do_check_eq(manB.global.hasExtUtils, "undefined");
-
-  // Confirm that Cu.import does not leak between SchemaAPIManager globals.
-  manA.loadScript(toLocalURI`
-      Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-      global.hasExtUtils = typeof ExtensionUtils;
-  `);
-  do_check_eq(manA.global.hasExtUtils, "object");  // Sanity check.
-  manB.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
-  do_check_eq(manB.global.hasExtUtils, "undefined");
-
-  // Prototype modifications should be isolated.
-  manA.loadScript(toLocalURI`
-      Object.prototype.modifiedByA = "Prrft";
-      global.fromA = {};
-  `);
-  manA.loadScript(toLocalURI`
-      global.fromAagain = {};
-  `);
-  manB.loadScript(toLocalURI`
-      global.fromB = {};
-  `);
-  do_check_eq(manA.global.modifiedByA, "Prrft");
-  do_check_eq(manA.global.fromA.modifiedByA, "Prrft");
-  do_check_eq(manA.global.fromAagain.modifiedByA, "Prrft");
-  do_check_eq(manB.global.modifiedByA, undefined);
-  do_check_eq(manB.global.fromB.modifiedByA, undefined);
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_load_events.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_load_events.js
deleted file mode 100644
index 26282fcb9..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_load_events.js
+++ /dev/null
@@ -1,23 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-/* eslint-disable mozilla/balanced-listeners */
-
-add_task(function* test_DOMContentLoaded_in_generated_background_page() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      function reportListener(event) {
-        browser.test.sendMessage("eventname", event.type);
-      }
-      document.addEventListener("DOMContentLoaded", reportListener);
-      window.addEventListener("load", reportListener);
-    },
-  });
-
-  yield extension.startup();
-  equal("DOMContentLoaded", yield extension.awaitMessage("eventname"));
-  equal("load", yield extension.awaitMessage("eventname"));
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_reload.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_reload.js
deleted file mode 100644
index 4bf59b798..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_generated_reload.js
+++ /dev/null
@@ -1,24 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_reload_generated_background_page() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      if (location.hash !== "#firstrun") {
-        browser.test.sendMessage("first run");
-        location.hash = "#firstrun";
-        browser.test.assertEq("#firstrun", location.hash);
-        location.reload();
-      } else {
-        browser.test.notifyPass("second run");
-      }
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("first run");
-  yield extension.awaitFinish("second run");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_global_history.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_global_history.js
deleted file mode 100644
index 092a9f5b3..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_global_history.js
+++ /dev/null
@@ -1,22 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://testing-common/PlacesTestUtils.jsm");
-
-add_task(function* test_global_history() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      browser.test.sendMessage("background-loaded", location.href);
-    },
-  });
-
-  yield extension.startup();
-
-  let backgroundURL = yield extension.awaitMessage("background-loaded");
-
-  yield extension.unload();
-
-  let exists = yield PlacesTestUtils.isPageInDB(backgroundURL);
-  ok(!exists, "Background URL should not be in history database");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js
deleted file mode 100644
index 8e8b5e0b0..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js
+++ /dev/null
@@ -1,40 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://gre/modules/Preferences.jsm");
-
-function* testBackgroundPage(expected) {
-  let extension = ExtensionTestUtils.loadExtension({
-    async background() {
-      browser.test.assertEq(window, browser.extension.getBackgroundPage(),
-                            "Caller should be able to access itself as a background page");
-      browser.test.assertEq(window, await browser.runtime.getBackgroundPage(),
-                            "Caller should be able to access itself as a background page");
-
-      browser.test.sendMessage("incognito", browser.extension.inIncognitoContext);
-    },
-  });
-
-  yield extension.startup();
-
-  let incognito = yield extension.awaitMessage("incognito");
-  equal(incognito, expected.incognito, "Expected incognito value");
-
-  yield extension.unload();
-}
-
-add_task(function* test_background_incognito() {
-  do_print("Test background page incognito value with permanent private browsing disabled");
-
-  yield testBackgroundPage({incognito: false});
-
-  do_print("Test background page incognito value with permanent private browsing enabled");
-
-  Preferences.set("browser.privatebrowsing.autostart", true);
-  do_register_cleanup(() => {
-    Preferences.reset("browser.privatebrowsing.autostart");
-  });
-
-  yield testBackgroundPage({incognito: true});
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_runtime_connect_params.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_runtime_connect_params.js
deleted file mode 100644
index 426833edd..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_runtime_connect_params.js
+++ /dev/null
@@ -1,72 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-function backgroundScript() {
-  let received_ports_number = 0;
-
-  const expected_received_ports_number = 1;
-
-  function countReceivedPorts(port) {
-    received_ports_number++;
-
-    if (port.name == "check-results") {
-      browser.runtime.onConnect.removeListener(countReceivedPorts);
-
-      browser.test.assertEq(expected_received_ports_number, received_ports_number, "invalid connect should not create a port");
-
-      browser.test.notifyPass("runtime.connect invalid params");
-    }
-  }
-
-  browser.runtime.onConnect.addListener(countReceivedPorts);
-
-  let childFrame = document.createElement("iframe");
-  childFrame.src = "extensionpage.html";
-  document.body.appendChild(childFrame);
-}
-
-function senderScript() {
-  let detected_invalid_connect_params = 0;
-
-  const invalid_connect_params = [
-    // too many params
-    ["fake-extensions-id", {name: "fake-conn-name"}, "unexpected third params"],
-    // invalid params format
-    [{}, {}],
-    ["fake-extensions-id", "invalid-connect-info-format"],
-  ];
-  const expected_detected_invalid_connect_params = invalid_connect_params.length;
-
-  function assertInvalidConnectParamsException(params) {
-    try {
-      browser.runtime.connect(...params);
-    } catch (e) {
-      detected_invalid_connect_params++;
-      browser.test.assertTrue(e.toString().indexOf("Incorrect argument types for runtime.connect.") >= 0, "exception message is correct");
-    }
-  }
-  for (let params of invalid_connect_params) {
-    assertInvalidConnectParamsException(params);
-  }
-  browser.test.assertEq(expected_detected_invalid_connect_params, detected_invalid_connect_params, "all invalid runtime.connect params detected");
-
-  browser.runtime.connect(browser.runtime.id, {name: "check-results"});
-}
-
-let extensionData = {
-  background: backgroundScript,
-  files: {
-    "senderScript.js": senderScript,
-    "extensionpage.html": `<!DOCTYPE html><meta charset="utf-8"><script src="senderScript.js"></script>`,
-  },
-};
-
-add_task(function* test_backgroundRuntimeConnectParams() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitFinish("runtime.connect invalid params");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_sub_windows.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_sub_windows.js
deleted file mode 100644
index c5f2f1332..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_sub_windows.js
+++ /dev/null
@@ -1,45 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* testBackgroundWindow() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      browser.test.log("background script executed");
-
-      browser.test.sendMessage("background-script-load");
-
-      let img = document.createElement("img");
-      img.src = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7";
-      document.body.appendChild(img);
-
-      img.onload = () => {
-        browser.test.log("image loaded");
-
-        let iframe = document.createElement("iframe");
-        iframe.src = "about:blank?1";
-
-        iframe.onload = () => {
-          browser.test.log("iframe loaded");
-          setTimeout(() => {
-            browser.test.notifyPass("background sub-window test done");
-          }, 0);
-        };
-        document.body.appendChild(iframe);
-      };
-    },
-  });
-
-  let loadCount = 0;
-  extension.onMessage("background-script-load", () => {
-    loadCount++;
-  });
-
-  yield extension.startup();
-
-  yield extension.awaitFinish("background sub-window test done");
-
-  equal(loadCount, 1, "background script loaded only once");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_window_properties.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_window_properties.js
deleted file mode 100644
index 948e2913e..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_background_window_properties.js
+++ /dev/null
@@ -1,34 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* testBackgroundWindowProperties() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      let expectedValues = {
-        screenX: 0,
-        screenY: 0,
-        outerWidth: 0,
-        outerHeight: 0,
-      };
-
-      for (let k in window) {
-        try {
-          if (k in expectedValues) {
-            browser.test.assertEq(expectedValues[k], window[k],
-                                  `should return the expected value for window property: ${k}`);
-          } else {
-            void window[k];
-          }
-        } catch (e) {
-          browser.test.assertEq(null, e, `unexpected exception accessing window property: ${k}`);
-        }
-      }
-
-      browser.test.notifyPass("background.testWindowProperties.done");
-    },
-  });
-  yield extension.startup();
-  yield extension.awaitFinish("background.testWindowProperties.done");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_contexts.js b/toolkit/components/webextensions/test/xpcshell/test_ext_contexts.js
deleted file mode 100644
index 56a14e189..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_contexts.js
+++ /dev/null
@@ -1,190 +0,0 @@
-"use strict";
-
-const global = this;
-
-Cu.import("resource://gre/modules/Timer.jsm");
-
-Cu.import("resource://gre/modules/ExtensionCommon.jsm");
-Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-
-var {
-  BaseContext,
-} = ExtensionCommon;
-
-var {
-  EventManager,
-  SingletonEventManager,
-} = ExtensionUtils;
-
-class StubContext extends BaseContext {
-  constructor() {
-    let fakeExtension = {id: "test@web.extension"};
-    super("testEnv", fakeExtension);
-    this.sandbox = Cu.Sandbox(global);
-  }
-
-  get cloneScope() {
-    return this.sandbox;
-  }
-}
-
-
-add_task(function* test_post_unload_promises() {
-  let context = new StubContext();
-
-  let fail = result => {
-    ok(false, `Unexpected callback: ${result}`);
-  };
-
-  // Make sure promises resolve normally prior to unload.
-  let promises = [
-    context.wrapPromise(Promise.resolve()),
-    context.wrapPromise(Promise.reject({message: ""})).catch(() => {}),
-  ];
-
-  yield Promise.all(promises);
-
-  // Make sure promises that resolve after unload do not trigger
-  // resolution handlers.
-
-  context.wrapPromise(Promise.resolve("resolved"))
-         .then(fail);
-
-  context.wrapPromise(Promise.reject({message: "rejected"}))
-         .then(fail, fail);
-
-  context.unload();
-
-  // The `setTimeout` ensures that we return to the event loop after
-  // promise resolution, which means we're guaranteed to return after
-  // any micro-tasks that get enqueued by the resolution handlers above.
-  yield new Promise(resolve => setTimeout(resolve, 0));
-});
-
-
-add_task(function* test_post_unload_listeners() {
-  let context = new StubContext();
-
-  let fireEvent;
-  let onEvent = new EventManager(context, "onEvent", fire => {
-    fireEvent = fire;
-    return () => {};
-  });
-
-  let fireSingleton;
-  let onSingleton = new SingletonEventManager(context, "onSingleton", callback => {
-    fireSingleton = () => {
-      Promise.resolve().then(callback);
-    };
-    return () => {};
-  });
-
-  let fail = event => {
-    ok(false, `Unexpected event: ${event}`);
-  };
-
-  // Check that event listeners aren't called after they've been removed.
-  onEvent.addListener(fail);
-  onSingleton.addListener(fail);
-
-  let promises = [
-    new Promise(resolve => onEvent.addListener(resolve)),
-    new Promise(resolve => onSingleton.addListener(resolve)),
-  ];
-
-  fireEvent("onEvent");
-  fireSingleton("onSingleton");
-
-  // Both `fireEvent` calls are dispatched asynchronously, so they won't
-  // have fired by this point. The `fail` listeners that we remove now
-  // should not be called, even though the events have already been
-  // enqueued.
-  onEvent.removeListener(fail);
-  onSingleton.removeListener(fail);
-
-  // Wait for the remaining listeners to be called, which should always
-  // happen after the `fail` listeners would normally be called.
-  yield Promise.all(promises);
-
-  // Check that event listeners aren't called after the context has
-  // unloaded.
-  onEvent.addListener(fail);
-  onSingleton.addListener(fail);
-
-  // The EventManager `fire` callback always dispatches events
-  // asynchronously, so we need to test that any pending event callbacks
-  // aren't fired after the context unloads. We also need to test that
-  // any `fire` calls that happen *after* the context is unloaded also
-  // do not trigger callbacks.
-  fireEvent("onEvent");
-  Promise.resolve("onEvent").then(fireEvent);
-
-  fireSingleton("onSingleton");
-  Promise.resolve("onSingleton").then(fireSingleton);
-
-  context.unload();
-
-  // The `setTimeout` ensures that we return to the event loop after
-  // promise resolution, which means we're guaranteed to return after
-  // any micro-tasks that get enqueued by the resolution handlers above.
-  yield new Promise(resolve => setTimeout(resolve, 0));
-});
-
-class Context extends BaseContext {
-  constructor(principal) {
-    let fakeExtension = {id: "test@web.extension"};
-    super("testEnv", fakeExtension);
-    Object.defineProperty(this, "principal", {
-      value: principal,
-      configurable: true,
-    });
-    this.sandbox = Cu.Sandbox(principal, {wantXrays: false});
-  }
-
-  get cloneScope() {
-    return this.sandbox;
-  }
-}
-
-let ssm = Services.scriptSecurityManager;
-const PRINCIPAL1 = ssm.createCodebasePrincipalFromOrigin("http://www.example.org");
-const PRINCIPAL2 = ssm.createCodebasePrincipalFromOrigin("http://www.somethingelse.org");
-
-// Test that toJSON() works in the json sandbox
-add_task(function* test_stringify_toJSON() {
-  let context = new Context(PRINCIPAL1);
-  let obj = Cu.evalInSandbox("({hidden: true, toJSON() { return {visible: true}; } })", context.sandbox);
-
-  let stringified = context.jsonStringify(obj);
-  let expected = JSON.stringify({visible: true});
-  equal(stringified, expected, "Stringified object with toJSON() method is as expected");
-});
-
-// Test that stringifying in inaccessible property throws
-add_task(function* test_stringify_inaccessible() {
-  let context = new Context(PRINCIPAL1);
-  let sandbox = context.sandbox;
-  let sandbox2 = Cu.Sandbox(PRINCIPAL2);
-
-  Cu.waiveXrays(sandbox).subobj = Cu.evalInSandbox("({ subobject: true })", sandbox2);
-  let obj = Cu.evalInSandbox("({ local: true, nested: subobj })", sandbox);
-  Assert.throws(() => {
-    context.jsonStringify(obj);
-  });
-});
-
-add_task(function* test_stringify_accessible() {
-  // Test that an accessible property from another global is included
-  let principal = Cu.getObjectPrincipal(Cu.Sandbox([PRINCIPAL1, PRINCIPAL2]));
-  let context = new Context(principal);
-  let sandbox = context.sandbox;
-  let sandbox2 = Cu.Sandbox(PRINCIPAL2);
-
-  Cu.waiveXrays(sandbox).subobj = Cu.evalInSandbox("({ subobject: true })", sandbox2);
-  let obj = Cu.evalInSandbox("({ local: true, nested: subobj })", sandbox);
-  let stringified = context.jsonStringify(obj);
-
-  let expected = JSON.stringify({local: true, nested: {subobject: true}});
-  equal(stringified, expected, "Stringified object with accessible property is as expected");
-});
-
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads.js b/toolkit/components/webextensions/test/xpcshell/test_ext_downloads.js
deleted file mode 100644
index 058b9b18c..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads.js
+++ /dev/null
@@ -1,76 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_downloads_api_namespace_and_permissions() {
-  function backgroundScript() {
-    browser.test.assertTrue(!!browser.downloads, "`downloads` API is present.");
-    browser.test.assertTrue(!!browser.downloads.FilenameConflictAction,
-                            "`downloads.FilenameConflictAction` enum is present.");
-    browser.test.assertTrue(!!browser.downloads.InterruptReason,
-                            "`downloads.InterruptReason` enum is present.");
-    browser.test.assertTrue(!!browser.downloads.DangerType,
-                            "`downloads.DangerType` enum is present.");
-    browser.test.assertTrue(!!browser.downloads.State,
-                            "`downloads.State` enum is present.");
-    browser.test.notifyPass("downloads tests");
-  }
-
-  let extensionData = {
-    background: backgroundScript,
-    manifest: {
-      permissions: ["downloads", "downloads.open", "downloads.shelf"],
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitFinish("downloads tests");
-  yield extension.unload();
-});
-
-add_task(function* test_downloads_open_permission() {
-  function backgroundScript() {
-    browser.test.assertFalse("open" in browser.downloads,
-                             "`downloads.open` permission is required.");
-    browser.test.notifyPass("downloads tests");
-  }
-
-  let extensionData = {
-    background: backgroundScript,
-    manifest: {
-      permissions: ["downloads"],
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitFinish("downloads tests");
-  yield extension.unload();
-});
-
-add_task(function* test_downloads_open() {
-  async function backgroundScript() {
-    await browser.test.assertRejects(
-      browser.downloads.open(10),
-      "Invalid download id 10",
-      "The error is informative.");
-
-    browser.test.notifyPass("downloads tests");
-
-    // TODO: Once downloads.{pause,cancel,resume} lands (bug 1245602) test that this gives a good
-    // error when called with an incompleted download.
-  }
-
-  let extensionData = {
-    background: backgroundScript,
-    manifest: {
-      permissions: ["downloads", "downloads.open"],
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitFinish("downloads tests");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_download.js b/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_download.js
deleted file mode 100644
index 37ddd4d7c..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_download.js
+++ /dev/null
@@ -1,354 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-/* global OS */
-
-Cu.import("resource://gre/modules/osfile.jsm");
-Cu.import("resource://gre/modules/Downloads.jsm");
-
-const gServer = createHttpServer();
-gServer.registerDirectory("/data/", do_get_file("data"));
-
-const WINDOWS = AppConstants.platform == "win";
-
-const BASE = `http://localhost:${gServer.identity.primaryPort}/data`;
-const FILE_NAME = "file_download.txt";
-const FILE_URL = BASE + "/" + FILE_NAME;
-const FILE_NAME_UNIQUE = "file_download(1).txt";
-const FILE_LEN = 46;
-
-let downloadDir;
-
-function setup() {
-  downloadDir = FileUtils.getDir("TmpD", ["downloads"]);
-  downloadDir.createUnique(Ci.nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-  do_print(`Using download directory ${downloadDir.path}`);
-
-  Services.prefs.setIntPref("browser.download.folderList", 2);
-  Services.prefs.setComplexValue("browser.download.dir", Ci.nsIFile, downloadDir);
-
-  do_register_cleanup(() => {
-    Services.prefs.clearUserPref("browser.download.folderList");
-    Services.prefs.clearUserPref("browser.download.dir");
-
-    let entries = downloadDir.directoryEntries;
-    while (entries.hasMoreElements()) {
-      let entry = entries.getNext().QueryInterface(Ci.nsIFile);
-      ok(false, `Leftover file ${entry.path} in download directory`);
-      entry.remove(false);
-    }
-
-    downloadDir.remove(false);
-  });
-}
-
-function backgroundScript() {
-  let blobUrl;
-  browser.test.onMessage.addListener(async (msg, ...args) => {
-    if (msg == "download.request") {
-      let options = args[0];
-
-      if (options.blobme) {
-        let blob = new Blob(options.blobme);
-        delete options.blobme;
-        blobUrl = options.url = window.URL.createObjectURL(blob);
-      }
-
-      try {
-        let id = await browser.downloads.download(options);
-        browser.test.sendMessage("download.done", {status: "success", id});
-      } catch (error) {
-        browser.test.sendMessage("download.done", {status: "error", errmsg: error.message});
-      }
-    } else if (msg == "killTheBlob") {
-      window.URL.revokeObjectURL(blobUrl);
-      blobUrl = null;
-    }
-  });
-
-  browser.test.sendMessage("ready");
-}
-
-// This function is a bit of a sledgehammer, it looks at every download
-// the browser knows about and waits for all active downloads to complete.
-// But we only start one at a time and only do a handful in total, so
-// this lets us test download() without depending on anything else.
-async function waitForDownloads() {
-  let list = await Downloads.getList(Downloads.ALL);
-  let downloads = await list.getAll();
-
-  let inprogress = downloads.filter(dl => !dl.stopped);
-  return Promise.all(inprogress.map(dl => dl.whenSucceeded()));
-}
-
-// Create a file in the downloads directory.
-function touch(filename) {
-  let file = downloadDir.clone();
-  file.append(filename);
-  file.create(Ci.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
-}
-
-// Remove a file in the downloads directory.
-function remove(filename, recursive = false) {
-  let file = downloadDir.clone();
-  file.append(filename);
-  file.remove(recursive);
-}
-
-add_task(function* test_downloads() {
-  setup();
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: `(${backgroundScript})()`,
-    manifest: {
-      permissions: ["downloads"],
-    },
-  });
-
-  function download(options) {
-    extension.sendMessage("download.request", options);
-    return extension.awaitMessage("download.done");
-  }
-
-  async function testDownload(options, localFile, expectedSize, description) {
-    let msg = await download(options);
-    equal(msg.status, "success", `downloads.download() works with ${description}`);
-
-    await waitForDownloads();
-
-    let localPath = downloadDir.clone();
-    let parts = Array.isArray(localFile) ? localFile : [localFile];
-
-    parts.map(p => localPath.append(p));
-    equal(localPath.fileSize, expectedSize, "Downloaded file has expected size");
-    localPath.remove(false);
-  }
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-  do_print("extension started");
-
-  // Call download() with just the url property.
-  yield testDownload({url: FILE_URL}, FILE_NAME, FILE_LEN, "just source");
-
-  // Call download() with a filename property.
-  yield testDownload({
-    url: FILE_URL,
-    filename: "newpath.txt",
-  }, "newpath.txt", FILE_LEN, "source and filename");
-
-  // Call download() with a filename with subdirs.
-  yield testDownload({
-    url: FILE_URL,
-    filename: "sub/dir/file",
-  }, ["sub", "dir", "file"], FILE_LEN, "source and filename with subdirs");
-
-  // Call download() with a filename with existing subdirs.
-  yield testDownload({
-    url: FILE_URL,
-    filename: "sub/dir/file2",
-  }, ["sub", "dir", "file2"], FILE_LEN, "source and filename with existing subdirs");
-
-  // Only run Windows path separator test on Windows.
-  if (WINDOWS) {
-    // Call download() with a filename with Windows path separator.
-    yield testDownload({
-      url: FILE_URL,
-      filename: "sub\\dir\\file3",
-    }, ["sub", "dir", "file3"], FILE_LEN, "filename with Windows path separator");
-  }
-  remove("sub", true);
-
-  // Call download(), filename with subdir, skipping parts.
-  yield testDownload({
-    url: FILE_URL,
-    filename: "skip//part",
-  }, ["skip", "part"], FILE_LEN, "source, filename, with subdir, skipping parts");
-  remove("skip", true);
-
-  // Check conflictAction of "uniquify".
-  touch(FILE_NAME);
-  yield testDownload({
-    url: FILE_URL,
-    conflictAction: "uniquify",
-  }, FILE_NAME_UNIQUE, FILE_LEN, "conflictAction=uniquify");
-  // todo check that preexisting file was not modified?
-  remove(FILE_NAME);
-
-  // Check conflictAction of "overwrite".
-  touch(FILE_NAME);
-  yield testDownload({
-    url: FILE_URL,
-    conflictAction: "overwrite",
-  }, FILE_NAME, FILE_LEN, "conflictAction=overwrite");
-
-  // Try to download in invalid url
-  yield download({url: "this is not a valid URL"}).then(msg => {
-    equal(msg.status, "error", "downloads.download() fails with invalid url");
-    ok(/not a valid URL/.test(msg.errmsg), "error message for invalid url is correct");
-  });
-
-  // Try to download to an empty path.
-  yield download({
-    url: FILE_URL,
-    filename: "",
-  }).then(msg => {
-    equal(msg.status, "error", "downloads.download() fails with empty filename");
-    equal(msg.errmsg, "filename must not be empty", "error message for empty filename is correct");
-  });
-
-  // Try to download to an absolute path.
-  const absolutePath = OS.Path.join(WINDOWS ? "\\tmp" : "/tmp", "file_download.txt");
-  yield download({
-    url: FILE_URL,
-    filename: absolutePath,
-  }).then(msg => {
-    equal(msg.status, "error", "downloads.download() fails with absolute filename");
-    equal(msg.errmsg, "filename must not be an absolute path", `error message for absolute path (${absolutePath}) is correct`);
-  });
-
-  if (WINDOWS) {
-    yield download({
-      url: FILE_URL,
-      filename: "C:\\file_download.txt",
-    }).then(msg => {
-      equal(msg.status, "error", "downloads.download() fails with absolute filename");
-      equal(msg.errmsg, "filename must not be an absolute path", "error message for absolute path with drive letter is correct");
-    });
-  }
-
-  // Try to download to a relative path containing ..
-  yield download({
-    url: FILE_URL,
-    filename: OS.Path.join("..", "file_download.txt"),
-  }).then(msg => {
-    equal(msg.status, "error", "downloads.download() fails with back-references");
-    equal(msg.errmsg, "filename must not contain back-references (..)", "error message for back-references is correct");
-  });
-
-  // Try to download to a long relative path containing ..
-  yield download({
-    url: FILE_URL,
-    filename: OS.Path.join("foo", "..", "..", "file_download.txt"),
-  }).then(msg => {
-    equal(msg.status, "error", "downloads.download() fails with back-references");
-    equal(msg.errmsg, "filename must not contain back-references (..)", "error message for back-references is correct");
-  });
-
-  // Try to download a blob url
-  const BLOB_STRING = "Hello, world";
-  yield testDownload({
-    blobme: [BLOB_STRING],
-    filename: FILE_NAME,
-  }, FILE_NAME, BLOB_STRING.length, "blob url");
-  extension.sendMessage("killTheBlob");
-
-  // Try to download a blob url without a given filename
-  yield testDownload({
-    blobme: [BLOB_STRING],
-  }, "download", BLOB_STRING.length, "blob url with no filename");
-  extension.sendMessage("killTheBlob");
-
-  yield extension.unload();
-});
-
-add_task(function* test_download_post() {
-  const server = createHttpServer();
-  const url = `http://localhost:${server.identity.primaryPort}/post-log`;
-
-  let received;
-  server.registerPathHandler("/post-log", request => {
-    received = request;
-  });
-
-  // Confirm received vs. expected values.
-  function confirm(method, headers = {}, body) {
-    equal(received.method, method, "method is correct");
-
-    for (let name in headers) {
-      ok(received.hasHeader(name), `header ${name} received`);
-      equal(received.getHeader(name), headers[name], `header ${name} is correct`);
-    }
-
-    if (body) {
-      const str = NetUtil.readInputStreamToString(received.bodyInputStream,
-        received.bodyInputStream.available());
-      equal(str, body, "body is correct");
-    }
-  }
-
-  function background() {
-    browser.test.onMessage.addListener(async options => {
-      try {
-        await browser.downloads.download(options);
-      } catch (err) {
-        browser.test.sendMessage("done", {err: err.message});
-      }
-    });
-    browser.downloads.onChanged.addListener(({state}) => {
-      if (state && state.current === "complete") {
-        browser.test.sendMessage("done", {ok: true});
-      }
-    });
-  }
-
-  const manifest = {permissions: ["downloads"]};
-  const extension = ExtensionTestUtils.loadExtension({background, manifest});
-  yield extension.startup();
-
-  function download(options) {
-    options.url = url;
-    options.conflictAction = "overwrite";
-
-    extension.sendMessage(options);
-    return extension.awaitMessage("done");
-  }
-
-  // Test method option.
-  let result = yield download({});
-  ok(result.ok, "download works without the method option, defaults to GET");
-  confirm("GET");
-
-  result = yield download({method: "PUT"});
-  ok(!result.ok, "download rejected with PUT method");
-  ok(/method: Invalid enumeration/.test(result.err), "descriptive error message");
-
-  result = yield download({method: "POST"});
-  ok(result.ok, "download works with POST method");
-  confirm("POST");
-
-  // Test body option values.
-  result = yield download({body: []});
-  ok(!result.ok, "download rejected because of non-string body");
-  ok(/body: Expected string/.test(result.err), "descriptive error message");
-
-  result = yield download({method: "POST", body: "of work"});
-  ok(result.ok, "download works with POST method and body");
-  confirm("POST", {"Content-Length": 7}, "of work");
-
-  // Test custom headers.
-  result = yield download({headers: [{name: "X-Custom"}]});
-  ok(!result.ok, "download rejected because of missing header value");
-  ok(/"value" is required/.test(result.err), "descriptive error message");
-
-  result = yield download({headers: [{name: "X-Custom", value: "13"}]});
-  ok(result.ok, "download works with a custom header");
-  confirm("GET", {"X-Custom": "13"});
-
-  // Test forbidden headers.
-  result = yield download({headers: [{name: "DNT", value: "1"}]});
-  ok(!result.ok, "download rejected because of forbidden header name DNT");
-  ok(/Forbidden request header/.test(result.err), "descriptive error message");
-
-  result = yield download({headers: [{name: "Proxy-Connection", value: "keep"}]});
-  ok(!result.ok, "download rejected because of forbidden header name prefix Proxy-");
-  ok(/Forbidden request header/.test(result.err), "descriptive error message");
-
-  result = yield download({headers: [{name: "Sec-ret", value: "13"}]});
-  ok(!result.ok, "download rejected because of forbidden header name prefix Sec-");
-  ok(/Forbidden request header/.test(result.err), "descriptive error message");
-
-  remove("post-log");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_misc.js b/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_misc.js
deleted file mode 100644
index d08aab666..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_misc.js
+++ /dev/null
@@ -1,862 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://gre/modules/Downloads.jsm");
-
-const server = createHttpServer();
-server.registerDirectory("/data/", do_get_file("data"));
-
-const ROOT = `http://localhost:${server.identity.primaryPort}`;
-const BASE = `${ROOT}/data`;
-const TXT_FILE = "file_download.txt";
-const TXT_URL = BASE + "/" + TXT_FILE;
-
-// Keep these in sync with code in interruptible.sjs
-const INT_PARTIAL_LEN = 15;
-const INT_TOTAL_LEN = 31;
-
-const TEST_DATA = "This is 31 bytes of sample data";
-const TOTAL_LEN = TEST_DATA.length;
-const PARTIAL_LEN = 15;
-
-// A handler to let us systematically test pausing/resuming/canceling
-// of downloads.  This target represents a small text file but a simple
-// GET will stall after sending part of the data, to give the test code
-// a chance to pause or do other operations on an in-progress download.
-// A resumed download (ie, a GET with a Range: header) will allow the
-// download to complete.
-function handleRequest(request, response) {
-  response.setHeader("Content-Type", "text/plain", false);
-
-  if (request.hasHeader("Range")) {
-    let start, end;
-    let matches = request.getHeader("Range")
-        .match(/^\s*bytes=(\d+)?-(\d+)?\s*$/);
-    if (matches != null) {
-      start = matches[1] ? parseInt(matches[1], 10) : 0;
-      end = matches[2] ? parseInt(matches[2], 10) : (TOTAL_LEN - 1);
-    }
-
-    if (end == undefined || end >= TOTAL_LEN) {
-      response.setStatusLine(request.httpVersion, 416, "Requested Range Not Satisfiable");
-      response.setHeader("Content-Range", `*/${TOTAL_LEN}`, false);
-      response.finish();
-      return;
-    }
-
-    response.setStatusLine(request.httpVersion, 206, "Partial Content");
-    response.setHeader("Content-Range", `${start}-${end}/${TOTAL_LEN}`, false);
-    response.write(TEST_DATA.slice(start, end + 1));
-  } else {
-    response.processAsync();
-    response.setHeader("Content-Length", `${TOTAL_LEN}`, false);
-    response.write(TEST_DATA.slice(0, PARTIAL_LEN));
-  }
-
-  do_register_cleanup(() => {
-    try {
-      response.finish();
-    } catch (e) {
-      // This will throw, but we don't care at this point.
-    }
-  });
-}
-
-server.registerPathHandler("/interruptible.html", handleRequest);
-
-let interruptibleCount = 0;
-function getInterruptibleUrl() {
-  let n = interruptibleCount++;
-  return `${ROOT}/interruptible.html?count=${n}`;
-}
-
-function backgroundScript() {
-  let events = new Set();
-  let eventWaiter = null;
-
-  browser.downloads.onCreated.addListener(data => {
-    events.add({type: "onCreated", data});
-    if (eventWaiter) {
-      eventWaiter();
-    }
-  });
-
-  browser.downloads.onChanged.addListener(data => {
-    events.add({type: "onChanged", data});
-    if (eventWaiter) {
-      eventWaiter();
-    }
-  });
-
-  browser.downloads.onErased.addListener(data => {
-    events.add({type: "onErased", data});
-    if (eventWaiter) {
-      eventWaiter();
-    }
-  });
-
-  // Returns a promise that will resolve when the given list of expected
-  // events have all been seen.  By default, succeeds only if the exact list
-  // of expected events is seen in the given order.  options.exact can be
-  // set to false to allow other events and options.inorder can be set to
-  // false to allow the events to arrive in any order.
-  function waitForEvents(expected, options = {}) {
-    function compare(a, b) {
-      if (typeof b == "object" && b != null) {
-        if (typeof a != "object") {
-          return false;
-        }
-        return Object.keys(b).every(fld => compare(a[fld], b[fld]));
-      }
-      return (a == b);
-    }
-
-    const exact = ("exact" in options) ? options.exact : true;
-    const inorder = ("inorder" in options) ? options.inorder : true;
-    return new Promise((resolve, reject) => {
-      function check() {
-        function fail(msg) {
-          browser.test.fail(msg);
-          reject(new Error(msg));
-        }
-        if (events.size < expected.length) {
-          return;
-        }
-        if (exact && expected.length < events.size) {
-          fail(`Got ${events.size} events but only expected ${expected.length}`);
-          return;
-        }
-
-        let remaining = new Set(events);
-        if (inorder) {
-          for (let event of events) {
-            if (compare(event, expected[0])) {
-              expected.shift();
-              remaining.delete(event);
-            }
-          }
-        } else {
-          expected = expected.filter(val => {
-            for (let remainingEvent of remaining) {
-              if (compare(remainingEvent, val)) {
-                remaining.delete(remainingEvent);
-                return false;
-              }
-            }
-            return true;
-          });
-        }
-
-        // Events that did occur have been removed from expected so if
-        // expected is empty, we're done.  If we didn't see all the
-        // expected events and we're not looking for an exact match,
-        // then we just may not have seen the event yet, so return without
-        // failing and check() will be called again when a new event arrives.
-        if (expected.length == 0) {
-          events = remaining;
-          eventWaiter = null;
-          resolve();
-        } else if (exact) {
-          fail(`Mismatched event: expecting ${JSON.stringify(expected[0])} but got ${JSON.stringify(Array.from(remaining)[0])}`);
-        }
-      }
-      eventWaiter = check;
-      check();
-    });
-  }
-
-  browser.test.onMessage.addListener(async (msg, ...args) => {
-    let match = msg.match(/(\w+).request$/);
-    if (!match) {
-      return;
-    }
-
-    let what = match[1];
-    if (what == "waitForEvents") {
-      try {
-        await waitForEvents(...args);
-        browser.test.sendMessage("waitForEvents.done", {status: "success"});
-      } catch (error) {
-        browser.test.sendMessage("waitForEvents.done", {status: "error", errmsg: error.message});
-      }
-    } else if (what == "clearEvents") {
-      events = new Set();
-      browser.test.sendMessage("clearEvents.done", {status: "success"});
-    } else {
-      try {
-        let result = await browser.downloads[what](...args);
-        browser.test.sendMessage(`${what}.done`, {status: "success", result});
-      } catch (error) {
-        browser.test.sendMessage(`${what}.done`, {status: "error", errmsg: error.message});
-      }
-    }
-  });
-
-  browser.test.sendMessage("ready");
-}
-
-let downloadDir;
-let extension;
-
-async function clearDownloads(callback) {
-  let list = await Downloads.getList(Downloads.ALL);
-  let downloads = await list.getAll();
-
-  await Promise.all(downloads.map(download => list.remove(download)));
-
-  return downloads;
-}
-
-function runInExtension(what, ...args) {
-  extension.sendMessage(`${what}.request`, ...args);
-  return extension.awaitMessage(`${what}.done`);
-}
-
-// This is pretty simplistic, it looks for a progress update for a
-// download of the given url in which the total bytes are exactly equal
-// to the given value.  Unless you know exactly how data will arrive from
-// the server (eg see interruptible.sjs), it probably isn't very useful.
-async function waitForProgress(url, bytes) {
-  let list = await Downloads.getList(Downloads.ALL);
-
-  return new Promise(resolve => {
-    const view = {
-      onDownloadChanged(download) {
-        if (download.source.url == url && download.currentBytes == bytes) {
-          list.removeView(view);
-          resolve();
-        }
-      },
-    };
-    list.addView(view);
-  });
-}
-
-add_task(function* setup() {
-  const nsIFile = Ci.nsIFile;
-  downloadDir = FileUtils.getDir("TmpD", ["downloads"]);
-  downloadDir.createUnique(nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-  do_print(`downloadDir ${downloadDir.path}`);
-
-  Services.prefs.setIntPref("browser.download.folderList", 2);
-  Services.prefs.setComplexValue("browser.download.dir", nsIFile, downloadDir);
-
-  do_register_cleanup(() => {
-    Services.prefs.clearUserPref("browser.download.folderList");
-    Services.prefs.clearUserPref("browser.download.dir");
-    downloadDir.remove(true);
-
-    return clearDownloads();
-  });
-
-  yield clearDownloads().then(downloads => {
-    do_print(`removed ${downloads.length} pre-existing downloads from history`);
-  });
-
-  extension = ExtensionTestUtils.loadExtension({
-    background: backgroundScript,
-    manifest: {
-      permissions: ["downloads"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-});
-
-add_task(function* test_events() {
-  let msg = yield runInExtension("download", {url: TXT_URL});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id, url: TXT_URL}},
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "complete",
-        },
-      },
-    },
-  ]);
-  equal(msg.status, "success", "got onCreated and onChanged events");
-});
-
-add_task(function* test_cancel() {
-  let url = getInterruptibleUrl();
-  do_print(url);
-  let msg = yield runInExtension("download", {url});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  let progressPromise = waitForProgress(url, INT_PARTIAL_LEN);
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id}},
-  ]);
-  equal(msg.status, "success", "got created and changed events");
-
-  yield progressPromise;
-  do_print(`download reached ${INT_PARTIAL_LEN} bytes`);
-
-  msg = yield runInExtension("cancel", id);
-  equal(msg.status, "success", "cancel() succeeded");
-
-  // This sequence of events is bogus (bug 1256243)
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        state: {
-          previous: "in_progress",
-          current: "interrupted",
-        },
-        paused: {
-          previous: false,
-          current: true,
-        },
-      },
-    }, {
-      type: "onChanged",
-      data: {
-        id,
-        error: {
-          previous: null,
-          current: "USER_CANCELED",
-        },
-      },
-    }, {
-      type: "onChanged",
-      data: {
-        id,
-        paused: {
-          previous: true,
-          current: false,
-        },
-      },
-    },
-  ]);
-  equal(msg.status, "success", "got onChanged events corresponding to cancel()");
-
-  msg = yield runInExtension("search", {error: "USER_CANCELED"});
-  equal(msg.status, "success", "search() succeeded");
-  equal(msg.result.length, 1, "search() found 1 download");
-  equal(msg.result[0].id, id, "download.id is correct");
-  equal(msg.result[0].state, "interrupted", "download.state is correct");
-  equal(msg.result[0].paused, false, "download.paused is correct");
-  equal(msg.result[0].canResume, false, "download.canResume is correct");
-  equal(msg.result[0].error, "USER_CANCELED", "download.error is correct");
-  equal(msg.result[0].totalBytes, INT_TOTAL_LEN, "download.totalBytes is correct");
-  equal(msg.result[0].exists, false, "download.exists is correct");
-
-  msg = yield runInExtension("pause", id);
-  equal(msg.status, "error", "cannot pause a canceled download");
-
-  msg = yield runInExtension("resume", id);
-  equal(msg.status, "error", "cannot resume a canceled download");
-});
-
-add_task(function* test_pauseresume() {
-  let url = getInterruptibleUrl();
-  let msg = yield runInExtension("download", {url});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  let progressPromise = waitForProgress(url, INT_PARTIAL_LEN);
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id}},
-  ]);
-  equal(msg.status, "success", "got created and changed events");
-
-  yield progressPromise;
-  do_print(`download reached ${INT_PARTIAL_LEN} bytes`);
-
-  msg = yield runInExtension("pause", id);
-  equal(msg.status, "success", "pause() succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "interrupted",
-        },
-        paused: {
-          previous: false,
-          current: true,
-        },
-        canResume: {
-          previous: false,
-          current: true,
-        },
-      },
-    }, {
-      type: "onChanged",
-      data: {
-        id,
-        error: {
-          previous: null,
-          current: "USER_CANCELED",
-        },
-      },
-    }]);
-  equal(msg.status, "success", "got onChanged event corresponding to pause");
-
-  msg = yield runInExtension("search", {paused: true});
-  equal(msg.status, "success", "search() succeeded");
-  equal(msg.result.length, 1, "search() found 1 download");
-  equal(msg.result[0].id, id, "download.id is correct");
-  equal(msg.result[0].state, "interrupted", "download.state is correct");
-  equal(msg.result[0].paused, true, "download.paused is correct");
-  equal(msg.result[0].canResume, true, "download.canResume is correct");
-  equal(msg.result[0].error, "USER_CANCELED", "download.error is correct");
-  equal(msg.result[0].bytesReceived, INT_PARTIAL_LEN, "download.bytesReceived is correct");
-  equal(msg.result[0].totalBytes, INT_TOTAL_LEN, "download.totalBytes is correct");
-  equal(msg.result[0].exists, false, "download.exists is correct");
-
-  msg = yield runInExtension("search", {error: "USER_CANCELED"});
-  equal(msg.status, "success", "search() succeeded");
-  let found = msg.result.filter(item => item.id == id);
-  equal(found.length, 1, "search() by error found the paused download");
-
-  msg = yield runInExtension("pause", id);
-  equal(msg.status, "error", "cannot pause an already paused download");
-
-  msg = yield runInExtension("resume", id);
-  equal(msg.status, "success", "resume() succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "interrupted",
-          current: "in_progress",
-        },
-        paused: {
-          previous: true,
-          current: false,
-        },
-        canResume: {
-          previous: true,
-          current: false,
-        },
-        error: {
-          previous: "USER_CANCELED",
-          current: null,
-        },
-      },
-    },
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "complete",
-        },
-      },
-    },
-  ]);
-  equal(msg.status, "success", "got onChanged events for resume and complete");
-
-  msg = yield runInExtension("search", {id});
-  equal(msg.status, "success", "search() succeeded");
-  equal(msg.result.length, 1, "search() found 1 download");
-  equal(msg.result[0].state, "complete", "download.state is correct");
-  equal(msg.result[0].paused, false, "download.paused is correct");
-  equal(msg.result[0].canResume, false, "download.canResume is correct");
-  equal(msg.result[0].error, null, "download.error is correct");
-  equal(msg.result[0].bytesReceived, INT_TOTAL_LEN, "download.bytesReceived is correct");
-  equal(msg.result[0].totalBytes, INT_TOTAL_LEN, "download.totalBytes is correct");
-  equal(msg.result[0].exists, true, "download.exists is correct");
-
-  msg = yield runInExtension("pause", id);
-  equal(msg.status, "error", "cannot pause a completed download");
-
-  msg = yield runInExtension("resume", id);
-  equal(msg.status, "error", "cannot resume a completed download");
-});
-
-add_task(function* test_pausecancel() {
-  let url = getInterruptibleUrl();
-  let msg = yield runInExtension("download", {url});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  let progressPromise = waitForProgress(url, INT_PARTIAL_LEN);
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id}},
-  ]);
-  equal(msg.status, "success", "got created and changed events");
-
-  yield progressPromise;
-  do_print(`download reached ${INT_PARTIAL_LEN} bytes`);
-
-  msg = yield runInExtension("pause", id);
-  equal(msg.status, "success", "pause() succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "interrupted",
-        },
-        paused: {
-          previous: false,
-          current: true,
-        },
-        canResume: {
-          previous: false,
-          current: true,
-        },
-      },
-    }, {
-      type: "onChanged",
-      data: {
-        id,
-        error: {
-          previous: null,
-          current: "USER_CANCELED",
-        },
-      },
-    }]);
-  equal(msg.status, "success", "got onChanged event corresponding to pause");
-
-  msg = yield runInExtension("search", {paused: true});
-  equal(msg.status, "success", "search() succeeded");
-  equal(msg.result.length, 1, "search() found 1 download");
-  equal(msg.result[0].id, id, "download.id is correct");
-  equal(msg.result[0].state, "interrupted", "download.state is correct");
-  equal(msg.result[0].paused, true, "download.paused is correct");
-  equal(msg.result[0].canResume, true, "download.canResume is correct");
-  equal(msg.result[0].error, "USER_CANCELED", "download.error is correct");
-  equal(msg.result[0].bytesReceived, INT_PARTIAL_LEN, "download.bytesReceived is correct");
-  equal(msg.result[0].totalBytes, INT_TOTAL_LEN, "download.totalBytes is correct");
-  equal(msg.result[0].exists, false, "download.exists is correct");
-
-  msg = yield runInExtension("search", {error: "USER_CANCELED"});
-  equal(msg.status, "success", "search() succeeded");
-  let found = msg.result.filter(item => item.id == id);
-  equal(found.length, 1, "search() by error found the paused download");
-
-  msg = yield runInExtension("cancel", id);
-  equal(msg.status, "success", "cancel() succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        id,
-        paused: {
-          previous: true,
-          current: false,
-        },
-        canResume: {
-          previous: true,
-          current: false,
-        },
-      },
-    },
-  ]);
-  equal(msg.status, "success", "got onChanged event for cancel");
-
-  msg = yield runInExtension("search", {id});
-  equal(msg.status, "success", "search() succeeded");
-  equal(msg.result.length, 1, "search() found 1 download");
-  equal(msg.result[0].state, "interrupted", "download.state is correct");
-  equal(msg.result[0].paused, false, "download.paused is correct");
-  equal(msg.result[0].canResume, false, "download.canResume is correct");
-  equal(msg.result[0].error, "USER_CANCELED", "download.error is correct");
-  equal(msg.result[0].totalBytes, INT_TOTAL_LEN, "download.totalBytes is correct");
-  equal(msg.result[0].exists, false, "download.exists is correct");
-});
-
-add_task(function* test_pause_resume_cancel_badargs() {
-  let BAD_ID = 1000;
-
-  let msg = yield runInExtension("pause", BAD_ID);
-  equal(msg.status, "error", "pause() failed with a bad download id");
-  ok(/Invalid download id/.test(msg.errmsg), "error message is descriptive");
-
-  msg = yield runInExtension("resume", BAD_ID);
-  equal(msg.status, "error", "resume() failed with a bad download id");
-  ok(/Invalid download id/.test(msg.errmsg), "error message is descriptive");
-
-  msg = yield runInExtension("cancel", BAD_ID);
-  equal(msg.status, "error", "cancel() failed with a bad download id");
-  ok(/Invalid download id/.test(msg.errmsg), "error message is descriptive");
-});
-
-add_task(function* test_file_removal() {
-  let msg = yield runInExtension("download", {url: TXT_URL});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id, url: TXT_URL}},
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "complete",
-        },
-      },
-    },
-  ]);
-
-  equal(msg.status, "success", "got onCreated and onChanged events");
-
-  msg = yield runInExtension("removeFile", id);
-  equal(msg.status, "success", "removeFile() succeeded");
-
-  msg = yield runInExtension("removeFile", id);
-  equal(msg.status, "error", "removeFile() fails since the file was already removed.");
-  ok(/file doesn't exist/.test(msg.errmsg), "removeFile() failed on removed file.");
-
-  msg = yield runInExtension("removeFile", 1000);
-  ok(/Invalid download id/.test(msg.errmsg), "removeFile() failed due to non-existent id");
-});
-
-add_task(function* test_removal_of_incomplete_download() {
-  let url = getInterruptibleUrl();
-  let msg = yield runInExtension("download", {url});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  let progressPromise = waitForProgress(url, INT_PARTIAL_LEN);
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id}},
-  ]);
-  equal(msg.status, "success", "got created and changed events");
-
-  yield progressPromise;
-  do_print(`download reached ${INT_PARTIAL_LEN} bytes`);
-
-  msg = yield runInExtension("pause", id);
-  equal(msg.status, "success", "pause() succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "interrupted",
-        },
-        paused: {
-          previous: false,
-          current: true,
-        },
-        canResume: {
-          previous: false,
-          current: true,
-        },
-      },
-    }, {
-      type: "onChanged",
-      data: {
-        id,
-        error: {
-          previous: null,
-          current: "USER_CANCELED",
-        },
-      },
-    }]);
-  equal(msg.status, "success", "got onChanged event corresponding to pause");
-
-  msg = yield runInExtension("removeFile", id);
-  equal(msg.status, "error", "removeFile() on paused download failed");
-
-  ok(/Cannot remove incomplete download/.test(msg.errmsg), "removeFile() failed due to download being incomplete");
-
-  msg = yield runInExtension("resume", id);
-  equal(msg.status, "success", "resume() succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "interrupted",
-          current: "in_progress",
-        },
-        paused: {
-          previous: true,
-          current: false,
-        },
-        canResume: {
-          previous: true,
-          current: false,
-        },
-        error: {
-          previous: "USER_CANCELED",
-          current: null,
-        },
-      },
-    },
-    {
-      type: "onChanged",
-      data: {
-        id,
-        state: {
-          previous: "in_progress",
-          current: "complete",
-        },
-      },
-    },
-  ]);
-  equal(msg.status, "success", "got onChanged events for resume and complete");
-
-  msg = yield runInExtension("removeFile", id);
-  equal(msg.status, "success", "removeFile() succeeded following completion of resumed download.");
-});
-
-// Test erase().  We don't do elaborate testing of the query handling
-// since it uses the exact same engine as search() which is tested
-// more thoroughly in test_chrome_ext_downloads_search.html
-add_task(function* test_erase() {
-  yield clearDownloads();
-
-  yield runInExtension("clearEvents");
-
-  function* download() {
-    let msg = yield runInExtension("download", {url: TXT_URL});
-    equal(msg.status, "success", "download succeeded");
-    let id = msg.result;
-
-    msg = yield runInExtension("waitForEvents", [{
-      type: "onChanged", data: {id, state: {current: "complete"}},
-    }], {exact: false});
-    equal(msg.status, "success", "download finished");
-
-    return id;
-  }
-
-  let ids = {};
-  ids.dl1 = yield download();
-  ids.dl2 = yield download();
-  ids.dl3 = yield download();
-
-  let msg = yield runInExtension("search", {});
-  equal(msg.status, "success", "search succeded");
-  equal(msg.result.length, 3, "search found 3 downloads");
-
-  msg = yield runInExtension("clearEvents");
-
-  msg = yield runInExtension("erase", {id: ids.dl1});
-  equal(msg.status, "success", "erase by id succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onErased", data: ids.dl1},
-  ]);
-  equal(msg.status, "success", "received onErased event");
-
-  msg = yield runInExtension("search", {});
-  equal(msg.status, "success", "search succeded");
-  equal(msg.result.length, 2, "search found 2 downloads");
-
-  msg = yield runInExtension("erase", {});
-  equal(msg.status, "success", "erase everything succeeded");
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onErased", data: ids.dl2},
-    {type: "onErased", data: ids.dl3},
-  ], {inorder: false});
-  equal(msg.status, "success", "received 2 onErased events");
-
-  msg = yield runInExtension("search", {});
-  equal(msg.status, "success", "search succeded");
-  equal(msg.result.length, 0, "search found 0 downloads");
-});
-
-function loadImage(img, data) {
-  return new Promise((resolve) => {
-    img.src = data;
-    img.onload = resolve;
-  });
-}
-
-add_task(function* test_getFileIcon() {
-  let webNav = Services.appShell.createWindowlessBrowser(false);
-  let docShell = webNav.QueryInterface(Ci.nsIInterfaceRequestor)
-                       .getInterface(Ci.nsIDocShell);
-
-  let system = Services.scriptSecurityManager.getSystemPrincipal();
-  docShell.createAboutBlankContentViewer(system);
-
-  let img = webNav.document.createElement("img");
-
-  let msg = yield runInExtension("download", {url: TXT_URL});
-  equal(msg.status, "success", "download() succeeded");
-  const id = msg.result;
-
-  msg = yield runInExtension("getFileIcon", id);
-  equal(msg.status, "success", "getFileIcon() succeeded");
-  yield loadImage(img, msg.result);
-  equal(img.height, 32, "returns an icon with the right height");
-  equal(img.width, 32, "returns an icon with the right width");
-
-  msg = yield runInExtension("waitForEvents", [
-    {type: "onCreated", data: {id, url: TXT_URL}},
-    {type: "onChanged"},
-  ]);
-  equal(msg.status, "success", "got events");
-
-  msg = yield runInExtension("getFileIcon", id);
-  equal(msg.status, "success", "getFileIcon() succeeded");
-  yield loadImage(img, msg.result);
-  equal(img.height, 32, "returns an icon with the right height after download");
-  equal(img.width, 32, "returns an icon with the right width after download");
-
-  msg = yield runInExtension("getFileIcon", id + 100);
-  equal(msg.status, "error", "getFileIcon() failed");
-  ok(msg.errmsg.includes("Invalid download id"), "download id is invalid");
-
-  msg = yield runInExtension("getFileIcon", id, {size: 127});
-  equal(msg.status, "success", "getFileIcon() succeeded");
-  yield loadImage(img, msg.result);
-  equal(img.height, 127, "returns an icon with the right custom height");
-  equal(img.width, 127, "returns an icon with the right custom width");
-
-  msg = yield runInExtension("getFileIcon", id, {size: 1});
-  equal(msg.status, "success", "getFileIcon() succeeded");
-  yield loadImage(img, msg.result);
-  equal(img.height, 1, "returns an icon with the right custom height");
-  equal(img.width, 1, "returns an icon with the right custom width");
-
-  msg = yield runInExtension("getFileIcon", id, {size: "foo"});
-  equal(msg.status, "error", "getFileIcon() fails");
-  ok(msg.errmsg.includes("Error processing size"), "size is not a number");
-
-  msg = yield runInExtension("getFileIcon", id, {size: 0});
-  equal(msg.status, "error", "getFileIcon() fails");
-  ok(msg.errmsg.includes("Error processing size"), "size is too small");
-
-  msg = yield runInExtension("getFileIcon", id, {size: 128});
-  equal(msg.status, "error", "getFileIcon() fails");
-  ok(msg.errmsg.includes("Error processing size"), "size is too big");
-
-  webNav.close();
-});
-
-add_task(function* cleanup() {
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_search.js b/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_search.js
deleted file mode 100644
index 4caa82456..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_downloads_search.js
+++ /dev/null
@@ -1,402 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://gre/modules/Downloads.jsm");
-
-const server = createHttpServer();
-server.registerDirectory("/data/", do_get_file("data"));
-
-const BASE = `http://localhost:${server.identity.primaryPort}/data`;
-const TXT_FILE = "file_download.txt";
-const TXT_URL = BASE + "/" + TXT_FILE;
-const TXT_LEN = 46;
-const HTML_FILE = "file_download.html";
-const HTML_URL = BASE + "/" + HTML_FILE;
-const HTML_LEN = 117;
-const BIG_LEN = 1000;  // something bigger both TXT_LEN and HTML_LEN
-
-function backgroundScript() {
-  let complete = new Map();
-
-  function waitForComplete(id) {
-    if (complete.has(id)) {
-      return complete.get(id).promise;
-    }
-
-    let promise = new Promise(resolve => {
-      complete.set(id, {resolve});
-    });
-    complete.get(id).promise = promise;
-    return promise;
-  }
-
-  browser.downloads.onChanged.addListener(change => {
-    if (change.state && change.state.current == "complete") {
-      // Make sure we have a promise.
-      waitForComplete(change.id);
-      complete.get(change.id).resolve();
-    }
-  });
-
-  browser.test.onMessage.addListener(async (msg, ...args) => {
-    if (msg == "download.request") {
-      try {
-        let id = await browser.downloads.download(args[0]);
-        browser.test.sendMessage("download.done", {status: "success", id});
-      } catch (error) {
-        browser.test.sendMessage("download.done", {status: "error", errmsg: error.message});
-      }
-    } else if (msg == "search.request") {
-      try {
-        let downloads = await browser.downloads.search(args[0]);
-        browser.test.sendMessage("search.done", {status: "success", downloads});
-      } catch (error) {
-        browser.test.sendMessage("search.done", {status: "error", errmsg: error.message});
-      }
-    } else if (msg == "waitForComplete.request") {
-      await waitForComplete(args[0]);
-      browser.test.sendMessage("waitForComplete.done");
-    }
-  });
-
-  browser.test.sendMessage("ready");
-}
-
-async function clearDownloads(callback) {
-  let list = await Downloads.getList(Downloads.ALL);
-  let downloads = await list.getAll();
-
-  await Promise.all(downloads.map(download => list.remove(download)));
-
-  return downloads;
-}
-
-add_task(function* test_search() {
-  const nsIFile = Ci.nsIFile;
-  let downloadDir = FileUtils.getDir("TmpD", ["downloads"]);
-  downloadDir.createUnique(nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-  do_print(`downloadDir ${downloadDir.path}`);
-
-  function downloadPath(filename) {
-    let path = downloadDir.clone();
-    path.append(filename);
-    return path.path;
-  }
-
-  Services.prefs.setIntPref("browser.download.folderList", 2);
-  Services.prefs.setComplexValue("browser.download.dir", nsIFile, downloadDir);
-
-  do_register_cleanup(async () => {
-    Services.prefs.clearUserPref("browser.download.folderList");
-    Services.prefs.clearUserPref("browser.download.dir");
-    await cleanupDir(downloadDir);
-    await clearDownloads();
-  });
-
-  yield clearDownloads().then(downloads => {
-    do_print(`removed ${downloads.length} pre-existing downloads from history`);
-  });
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background: backgroundScript,
-    manifest: {
-      permissions: ["downloads"],
-    },
-  });
-
-  async function download(options) {
-    extension.sendMessage("download.request", options);
-    let result = await extension.awaitMessage("download.done");
-
-    if (result.status == "success") {
-      do_print(`wait for onChanged event to indicate ${result.id} is complete`);
-      extension.sendMessage("waitForComplete.request", result.id);
-
-      await extension.awaitMessage("waitForComplete.done");
-    }
-
-    return result;
-  }
-
-  function search(query) {
-    extension.sendMessage("search.request", query);
-    return extension.awaitMessage("search.done");
-  }
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  // Do some downloads...
-  const time1 = new Date();
-
-  let downloadIds = {};
-  let msg = yield download({url: TXT_URL});
-  equal(msg.status, "success", "download() succeeded");
-  downloadIds.txt1 = msg.id;
-
-  const TXT_FILE2 = "NewFile.txt";
-  msg = yield download({url: TXT_URL, filename: TXT_FILE2});
-  equal(msg.status, "success", "download() succeeded");
-  downloadIds.txt2 = msg.id;
-
-  const time2 = new Date();
-
-  msg = yield download({url: HTML_URL});
-  equal(msg.status, "success", "download() succeeded");
-  downloadIds.html1 = msg.id;
-
-  const HTML_FILE2 = "renamed.html";
-  msg = yield download({url: HTML_URL, filename: HTML_FILE2});
-  equal(msg.status, "success", "download() succeeded");
-  downloadIds.html2 = msg.id;
-
-  const time3 = new Date();
-
-  // Search for each individual download and check
-  // the corresponding DownloadItem.
-  function* checkDownloadItem(id, expect) {
-    let item = yield search({id});
-    equal(item.status, "success", "search() succeeded");
-    equal(item.downloads.length, 1, "search() found exactly 1 download");
-
-    Object.keys(expect).forEach(function(field) {
-      equal(item.downloads[0][field], expect[field], `DownloadItem.${field} is correct"`);
-    });
-  }
-  yield checkDownloadItem(downloadIds.txt1, {
-    url: TXT_URL,
-    filename: downloadPath(TXT_FILE),
-    mime: "text/plain",
-    state: "complete",
-    bytesReceived: TXT_LEN,
-    totalBytes: TXT_LEN,
-    fileSize: TXT_LEN,
-    exists: true,
-  });
-
-  yield checkDownloadItem(downloadIds.txt2, {
-    url: TXT_URL,
-    filename: downloadPath(TXT_FILE2),
-    mime: "text/plain",
-    state: "complete",
-    bytesReceived: TXT_LEN,
-    totalBytes: TXT_LEN,
-    fileSize: TXT_LEN,
-    exists: true,
-  });
-
-  yield checkDownloadItem(downloadIds.html1, {
-    url: HTML_URL,
-    filename: downloadPath(HTML_FILE),
-    mime: "text/html",
-    state: "complete",
-    bytesReceived: HTML_LEN,
-    totalBytes: HTML_LEN,
-    fileSize: HTML_LEN,
-    exists: true,
-  });
-
-  yield checkDownloadItem(downloadIds.html2, {
-    url: HTML_URL,
-    filename: downloadPath(HTML_FILE2),
-    mime: "text/html",
-    state: "complete",
-    bytesReceived: HTML_LEN,
-    totalBytes: HTML_LEN,
-    fileSize: HTML_LEN,
-    exists: true,
-  });
-
-  function* checkSearch(query, expected, description, exact) {
-    let item = yield search(query);
-    equal(item.status, "success", "search() succeeded");
-    equal(item.downloads.length, expected.length, `search() for ${description} found exactly ${expected.length} downloads`);
-
-    let receivedIds = item.downloads.map(i => i.id);
-    if (exact) {
-      receivedIds.forEach((id, idx) => {
-        equal(id, downloadIds[expected[idx]], `search() for ${description} returned ${expected[idx]} in position ${idx}`);
-      });
-    } else {
-      Object.keys(downloadIds).forEach(key => {
-        const id = downloadIds[key];
-        const thisExpected = expected.includes(key);
-        equal(receivedIds.includes(id), thisExpected,
-           `search() for ${description} ${thisExpected ? "includes" : "does not include"} ${key}`);
-      });
-    }
-  }
-
-  // Check that search with an invalid id returns nothing.
-  // NB: for now ids are not persistent and we start numbering them at 1
-  //     so a sufficiently large number will be unused.
-  const INVALID_ID = 1000;
-  yield checkSearch({id: INVALID_ID}, [], "invalid id");
-
-  // Check that search on url works.
-  yield checkSearch({url: TXT_URL}, ["txt1", "txt2"], "url");
-
-  // Check that regexp on url works.
-  const HTML_REGEX = "[downlad]{8}\.html+$";
-  yield checkSearch({urlRegex: HTML_REGEX}, ["html1", "html2"], "url regexp");
-
-  // Check that compatible url+regexp works
-  yield checkSearch({url: HTML_URL, urlRegex: HTML_REGEX}, ["html1", "html2"], "compatible url+urlRegex");
-
-  // Check that incompatible url+regexp works
-  yield checkSearch({url: TXT_URL, urlRegex: HTML_REGEX}, [], "incompatible url+urlRegex");
-
-  // Check that search on filename works.
-  yield checkSearch({filename: downloadPath(TXT_FILE)}, ["txt1"], "filename");
-
-  // Check that regexp on filename works.
-  yield checkSearch({filenameRegex: HTML_REGEX}, ["html1"], "filename regex");
-
-  // Check that compatible filename+regexp works
-  yield checkSearch({filename: downloadPath(HTML_FILE), filenameRegex: HTML_REGEX}, ["html1"], "compatible filename+filename regex");
-
-  // Check that incompatible filename+regexp works
-  yield checkSearch({filename: downloadPath(TXT_FILE), filenameRegex: HTML_REGEX}, [], "incompatible filename+filename regex");
-
-  // Check that simple positive search terms work.
-  yield checkSearch({query: ["file_download"]}, ["txt1", "txt2", "html1", "html2"],
-                    "term file_download");
-  yield checkSearch({query: ["NewFile"]}, ["txt2"], "term NewFile");
-
-  // Check that positive search terms work case-insensitive.
-  yield checkSearch({query: ["nEwfILe"]}, ["txt2"], "term nEwfiLe");
-
-  // Check that negative search terms work.
-  yield checkSearch({query: ["-txt"]}, ["html1", "html2"], "term -txt");
-
-  // Check that positive and negative search terms together work.
-  yield checkSearch({query: ["html", "-renamed"]}, ["html1"], "postive and negative terms");
-
-  function* checkSearchWithDate(query, expected, description) {
-    const fields = Object.keys(query);
-    if (fields.length != 1 || !(query[fields[0]] instanceof Date)) {
-      throw new Error("checkSearchWithDate expects exactly one Date field");
-    }
-    const field = fields[0];
-    const date = query[field];
-
-    let newquery = {};
-
-    // Check as a Date
-    newquery[field] = date;
-    yield checkSearch(newquery, expected, `${description} as Date`);
-
-    // Check as numeric milliseconds
-    newquery[field] = date.valueOf();
-    yield checkSearch(newquery, expected, `${description} as numeric ms`);
-
-    // Check as stringified milliseconds
-    newquery[field] = date.valueOf().toString();
-    yield checkSearch(newquery, expected, `${description} as string ms`);
-
-    // Check as ISO string
-    newquery[field] = date.toISOString();
-    yield checkSearch(newquery, expected, `${description} as iso string`);
-  }
-
-  // Check startedBefore
-  yield checkSearchWithDate({startedBefore: time1}, [], "before time1");
-  yield checkSearchWithDate({startedBefore: time2}, ["txt1", "txt2"], "before time2");
-  yield checkSearchWithDate({startedBefore: time3}, ["txt1", "txt2", "html1", "html2"], "before time3");
-
-  // Check startedAfter
-  yield checkSearchWithDate({startedAfter: time1}, ["txt1", "txt2", "html1", "html2"], "after time1");
-  yield checkSearchWithDate({startedAfter: time2}, ["html1", "html2"], "after time2");
-  yield checkSearchWithDate({startedAfter: time3}, [], "after time3");
-
-  // Check simple search on totalBytes
-  yield checkSearch({totalBytes: TXT_LEN}, ["txt1", "txt2"], "totalBytes");
-  yield checkSearch({totalBytes: HTML_LEN}, ["html1", "html2"], "totalBytes");
-
-  // Check simple test on totalBytes{Greater,Less}
-  // (NB: TXT_LEN < HTML_LEN < BIG_LEN)
-  yield checkSearch({totalBytesGreater: 0}, ["txt1", "txt2", "html1", "html2"], "totalBytesGreater than 0");
-  yield checkSearch({totalBytesGreater: TXT_LEN}, ["html1", "html2"], `totalBytesGreater than ${TXT_LEN}`);
-  yield checkSearch({totalBytesGreater: HTML_LEN}, [], `totalBytesGreater than ${HTML_LEN}`);
-  yield checkSearch({totalBytesLess: TXT_LEN}, [], `totalBytesLess than ${TXT_LEN}`);
-  yield checkSearch({totalBytesLess: HTML_LEN}, ["txt1", "txt2"], `totalBytesLess than ${HTML_LEN}`);
-  yield checkSearch({totalBytesLess: BIG_LEN}, ["txt1", "txt2", "html1", "html2"], `totalBytesLess than ${BIG_LEN}`);
-
-  // Check good combinations of totalBytes*.
-  yield checkSearch({totalBytes: HTML_LEN, totalBytesGreater: TXT_LEN}, ["html1", "html2"], "totalBytes and totalBytesGreater");
-  yield checkSearch({totalBytes: TXT_LEN, totalBytesLess: HTML_LEN}, ["txt1", "txt2"], "totalBytes and totalBytesGreater");
-  yield checkSearch({totalBytes: HTML_LEN, totalBytesLess: BIG_LEN, totalBytesGreater: 0}, ["html1", "html2"], "totalBytes and totalBytesLess and totalBytesGreater");
-
-  // Check bad combination of totalBytes*.
-  yield checkSearch({totalBytesLess: TXT_LEN, totalBytesGreater: HTML_LEN}, [], "bad totalBytesLess, totalBytesGreater combination");
-  yield checkSearch({totalBytes: TXT_LEN, totalBytesGreater: HTML_LEN}, [], "bad totalBytes, totalBytesGreater combination");
-  yield checkSearch({totalBytes: HTML_LEN, totalBytesLess: TXT_LEN}, [], "bad totalBytes, totalBytesLess combination");
-
-  // Check mime.
-  yield checkSearch({mime: "text/plain"}, ["txt1", "txt2"], "mime text/plain");
-  yield checkSearch({mime: "text/html"}, ["html1", "html2"], "mime text/htmlplain");
-  yield checkSearch({mime: "video/webm"}, [], "mime video/webm");
-
-  // Check fileSize.
-  yield checkSearch({fileSize: TXT_LEN}, ["txt1", "txt2"], "fileSize");
-  yield checkSearch({fileSize: HTML_LEN}, ["html1", "html2"], "fileSize");
-
-  // Fields like bytesReceived, paused, state, exists are meaningful
-  // for downloads that are in progress but have not yet completed.
-  // todo: add tests for these when we have better support for in-progress
-  // downloads (e.g., after pause(), resume() and cancel() are implemented)
-
-  // Check multiple query properties.
-  // We could make this testing arbitrarily complicated...
-  // We already tested combining fields with obvious interactions above
-  // (e.g., filename and filenameRegex or startTime and startedBefore/After)
-  // so now just throw as many fields as we can at a single search and
-  // make sure a simple case still works.
-  yield checkSearch({
-    url: TXT_URL,
-    urlRegex: "download",
-    filename: downloadPath(TXT_FILE),
-    filenameRegex: "download",
-    query: ["download"],
-    startedAfter: time1.valueOf().toString(),
-    startedBefore: time2.valueOf().toString(),
-    totalBytes: TXT_LEN,
-    totalBytesGreater: 0,
-    totalBytesLess: BIG_LEN,
-    mime: "text/plain",
-    fileSize: TXT_LEN,
-  }, ["txt1"], "many properties");
-
-  // Check simple orderBy (forward and backward).
-  yield checkSearch({orderBy: ["startTime"]}, ["txt1", "txt2", "html1", "html2"], "orderBy startTime", true);
-  yield checkSearch({orderBy: ["-startTime"]}, ["html2", "html1", "txt2", "txt1"], "orderBy -startTime", true);
-
-  // Check orderBy with multiple fields.
-  // NB: TXT_URL and HTML_URL differ only in extension and .html precedes .txt
-  yield checkSearch({orderBy: ["url", "-startTime"]}, ["html2", "html1", "txt2", "txt1"], "orderBy with multiple fields", true);
-
-  // Check orderBy with limit.
-  yield checkSearch({orderBy: ["url"], limit: 1}, ["html1"], "orderBy with limit", true);
-
-  // Check bad arguments.
-  function* checkBadSearch(query, pattern, description) {
-    let item = yield search(query);
-    equal(item.status, "error", "search() failed");
-    ok(pattern.test(item.errmsg), `error message for ${description} was correct (${item.errmsg}).`);
-  }
-
-  yield checkBadSearch("myquery", /Incorrect argument type/, "query is not an object");
-  yield checkBadSearch({bogus: "boo"}, /Unexpected property/, "query contains an unknown field");
-  yield checkBadSearch({query: "query string"}, /Expected array/, "query.query is a string");
-  yield checkBadSearch({startedBefore: "i am not a time"}, /Type error/, "query.startedBefore is not a valid time");
-  yield checkBadSearch({startedAfter: "i am not a time"}, /Type error/, "query.startedAfter is not a valid time");
-  yield checkBadSearch({endedBefore: "i am not a time"}, /Type error/, "query.endedBefore is not a valid time");
-  yield checkBadSearch({endedAfter: "i am not a time"}, /Type error/, "query.endedAfter is not a valid time");
-  yield checkBadSearch({urlRegex: "["}, /Invalid urlRegex/, "query.urlRegexp is not a valid regular expression");
-  yield checkBadSearch({filenameRegex: "["}, /Invalid filenameRegex/, "query.filenameRegexp is not a valid regular expression");
-  yield checkBadSearch({orderBy: "startTime"}, /Expected array/, "query.orderBy is not an array");
-  yield checkBadSearch({orderBy: ["bogus"]}, /Invalid orderBy field/, "query.orderBy references a non-existent field");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_experiments.js b/toolkit/components/webextensions/test/xpcshell/test_ext_experiments.js
deleted file mode 100644
index bc6bfcd68..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_experiments.js
+++ /dev/null
@@ -1,175 +0,0 @@
-"use strict";
-
-/* globals browser */
-
-XPCOMUtils.defineLazyModuleGetter(this, "AddonManager",
-                                  "resource://gre/modules/AddonManager.jsm");
-
-function promiseAddonStartup() {
-  const {Management} = Cu.import("resource://gre/modules/Extension.jsm");
-
-  return new Promise(resolve => {
-    let listener = (evt, extension) => {
-      Management.off("startup", listener);
-      resolve(extension);
-    };
-
-    Management.on("startup", listener);
-  });
-}
-
-add_task(function* setup() {
-  yield ExtensionTestUtils.startAddonManager();
-});
-
-add_task(function* test_experiments_api() {
-  let apiAddonFile = Extension.generateZipFile({
-    "install.rdf": `<?xml version="1.0" encoding="UTF-8"?>
-      <RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-           xmlns:em="http://www.mozilla.org/2004/em-rdf#">
-          <Description about="urn:mozilla:install-manifest"
-              em:id="meh@experiments.addons.mozilla.org"
-              em:name="Meh Experiment"
-              em:type="256"
-              em:version="0.1"
-              em:description="Meh experiment"
-              em:creator="Mozilla">
-
-              <em:targetApplication>
-                  <Description
-                      em:id="xpcshell@tests.mozilla.org"
-                      em:minVersion="48"
-                      em:maxVersion="*"/>
-              </em:targetApplication>
-          </Description>
-      </RDF>
-    `,
-
-    "api.js": String.raw`
-      Components.utils.import("resource://gre/modules/Services.jsm");
-
-      Services.obs.notifyObservers(null, "webext-api-loaded", "");
-
-      class API extends ExtensionAPI {
-        getAPI(context) {
-          return {
-            meh: {
-              hello(text) {
-                Services.obs.notifyObservers(null, "webext-api-hello", text);
-              }
-            }
-          }
-        }
-      }
-    `,
-
-    "schema.json": [
-      {
-        "namespace": "meh",
-        "description": "All full of meh.",
-        "permissions": ["experiments.meh"],
-        "functions": [
-          {
-            "name": "hello",
-            "type": "function",
-            "description": "Hates you. This is all.",
-            "parameters": [
-              {"type": "string", "name": "text"},
-            ],
-          },
-        ],
-      },
-    ],
-  });
-
-  let addonFile = Extension.generateXPI({
-    manifest: {
-      applications: {gecko: {id: "meh@web.extension"}},
-      permissions: ["experiments.meh"],
-    },
-
-    background() {
-      // The test code below checks that hello() is called at the right
-      // time with the string "Here I am".  Verify that the api schema is
-      // being correctly interpreted by calling hello() with bad arguments
-      // and only calling hello() with the magic string if the call with
-      // bad arguments throws.
-      try {
-        browser.meh.hello("I should not see this", "since two arguments are bad");
-      } catch (err) {
-        browser.meh.hello("Here I am");
-      }
-    },
-  });
-
-  let boringAddonFile = Extension.generateXPI({
-    manifest: {
-      applications: {gecko: {id: "boring@web.extension"}},
-    },
-    background() {
-      if (browser.meh) {
-        browser.meh.hello("Here I should not be");
-      }
-    },
-  });
-
-  do_register_cleanup(() => {
-    for (let file of [apiAddonFile, addonFile, boringAddonFile]) {
-      Services.obs.notifyObservers(file, "flush-cache-entry", null);
-      file.remove(false);
-    }
-  });
-
-
-  let resolveHello;
-  let observer = (subject, topic, data) => {
-    if (topic == "webext-api-loaded") {
-      ok(!!resolveHello, "Should not see API loaded until dependent extension loads");
-    } else if (topic == "webext-api-hello") {
-      resolveHello(data);
-    }
-  };
-
-  Services.obs.addObserver(observer, "webext-api-loaded", false);
-  Services.obs.addObserver(observer, "webext-api-hello", false);
-  do_register_cleanup(() => {
-    Services.obs.removeObserver(observer, "webext-api-loaded");
-    Services.obs.removeObserver(observer, "webext-api-hello");
-  });
-
-
-  // Install API add-on.
-  let apiAddon = yield AddonManager.installTemporaryAddon(apiAddonFile);
-
-  let {APIs} = Cu.import("resource://gre/modules/ExtensionManagement.jsm", {});
-  ok(APIs.apis.has("meh"), "Should have meh API.");
-
-
-  // Install boring WebExtension add-on.
-  let boringAddon = yield AddonManager.installTemporaryAddon(boringAddonFile);
-  yield promiseAddonStartup();
-
-
-  // Install interesting WebExtension add-on.
-  let promise = new Promise(resolve => {
-    resolveHello = resolve;
-  });
-
-  let addon = yield AddonManager.installTemporaryAddon(addonFile);
-  yield promiseAddonStartup();
-
-  let hello = yield promise;
-  equal(hello, "Here I am", "Should get hello from add-on");
-
-  // Cleanup.
-  apiAddon.uninstall();
-
-  boringAddon.userDisabled = true;
-  yield new Promise(do_execute_soon);
-
-  equal(addon.appDisabled, true, "Add-on should be app-disabled after its dependency is removed.");
-
-  addon.uninstall();
-  boringAddon.uninstall();
-});
-
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_extension.js b/toolkit/components/webextensions/test/xpcshell/test_ext_extension.js
deleted file mode 100644
index f18845f6a..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_extension.js
+++ /dev/null
@@ -1,55 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_is_allowed_incognito_access() {
-  async function background() {
-    let allowed = await browser.extension.isAllowedIncognitoAccess();
-
-    browser.test.assertEq(true, allowed, "isAllowedIncognitoAccess is true");
-    browser.test.notifyPass("isAllowedIncognitoAccess");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {},
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("isAllowedIncognitoAccess");
-  yield extension.unload();
-});
-
-add_task(function* test_in_incognito_context_false() {
-  function background() {
-    browser.test.assertEq(false, browser.extension.inIncognitoContext, "inIncognitoContext returned false");
-    browser.test.notifyPass("inIncognitoContext");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {},
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("inIncognitoContext");
-  yield extension.unload();
-});
-
-add_task(function* test_is_allowed_file_scheme_access() {
-  async function background() {
-    let allowed = await browser.extension.isAllowedFileSchemeAccess();
-
-    browser.test.assertEq(false, allowed, "isAllowedFileSchemeAccess is false");
-    browser.test.notifyPass("isAllowedFileSchemeAccess");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {},
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("isAllowedFileSchemeAccess");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_idle.js b/toolkit/components/webextensions/test/xpcshell/test_ext_idle.js
deleted file mode 100644
index 89bcac217..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_idle.js
+++ /dev/null
@@ -1,202 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://testing-common/MockRegistrar.jsm");
-
-let idleService = {
-  _observers: new Set(),
-  _activity: {
-    addCalls: [],
-    removeCalls: [],
-    observerFires: [],
-  },
-  _reset: function() {
-    this._observers.clear();
-    this._activity.addCalls = [];
-    this._activity.removeCalls = [];
-    this._activity.observerFires = [];
-  },
-  _fireObservers: function(state) {
-    for (let observer of this._observers.values()) {
-      observer.observe(observer, state, null);
-      this._activity.observerFires.push(state);
-    }
-  },
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsIIdleService]),
-  idleTime: 19999,
-  addIdleObserver: function(observer, time) {
-    this._observers.add(observer);
-    this._activity.addCalls.push(time);
-  },
-  removeIdleObserver: function(observer, time) {
-    this._observers.delete(observer);
-    this._activity.removeCalls.push(time);
-  },
-};
-
-function checkActivity(expectedActivity) {
-  let {expectedAdd, expectedRemove, expectedFires} = expectedActivity;
-  let {addCalls, removeCalls, observerFires} = idleService._activity;
-  equal(expectedAdd.length, addCalls.length, "idleService.addIdleObserver was called the expected number of times");
-  equal(expectedRemove.length, removeCalls.length, "idleService.removeIdleObserver was called the expected number of times");
-  equal(expectedFires.length, observerFires.length, "idle observer was fired the expected number of times");
-  deepEqual(addCalls, expectedAdd, "expected interval passed to idleService.addIdleObserver");
-  deepEqual(removeCalls, expectedRemove, "expected interval passed to idleService.removeIdleObserver");
-  deepEqual(observerFires, expectedFires, "expected topic passed to idle observer");
-}
-
-add_task(function* setup() {
-  let fakeIdleService = MockRegistrar.register("@mozilla.org/widget/idleservice;1", idleService);
-  do_register_cleanup(() => {
-    MockRegistrar.unregister(fakeIdleService);
-  });
-});
-
-add_task(function* testQueryStateActive() {
-  function background() {
-    browser.idle.queryState(20).then(status => {
-      browser.test.assertEq("active", status, "Idle status is active");
-      browser.test.notifyPass("idle");
-    },
-    err => {
-      browser.test.fail(`Error: ${err} :: ${err.stack}`);
-      browser.test.notifyFail("idle");
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("idle");
-  yield extension.unload();
-});
-
-add_task(function* testQueryStateIdle() {
-  function background() {
-    browser.idle.queryState(15).then(status => {
-      browser.test.assertEq("idle", status, "Idle status is idle");
-      browser.test.notifyPass("idle");
-    },
-    err => {
-      browser.test.fail(`Error: ${err} :: ${err.stack}`);
-      browser.test.notifyFail("idle");
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("idle");
-  yield extension.unload();
-});
-
-add_task(function* testOnlySetDetectionInterval() {
-  function background() {
-    browser.idle.setDetectionInterval(99);
-    browser.test.sendMessage("detectionIntervalSet");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  idleService._reset();
-  yield extension.startup();
-  yield extension.awaitMessage("detectionIntervalSet");
-  idleService._fireObservers("idle");
-  checkActivity({expectedAdd: [], expectedRemove: [], expectedFires: []});
-  yield extension.unload();
-});
-
-add_task(function* testSetDetectionIntervalBeforeAddingListener() {
-  function background() {
-    browser.idle.setDetectionInterval(99);
-    browser.idle.onStateChanged.addListener(newState => {
-      browser.test.assertEq("idle", newState, "listener fired with the expected state");
-      browser.test.sendMessage("listenerFired");
-    });
-    browser.test.sendMessage("listenerAdded");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  idleService._reset();
-  yield extension.startup();
-  yield extension.awaitMessage("listenerAdded");
-  idleService._fireObservers("idle");
-  yield extension.awaitMessage("listenerFired");
-  checkActivity({expectedAdd: [99], expectedRemove: [], expectedFires: ["idle"]});
-  yield extension.unload();
-});
-
-add_task(function* testSetDetectionIntervalAfterAddingListener() {
-  function background() {
-    browser.idle.onStateChanged.addListener(newState => {
-      browser.test.assertEq("idle", newState, "listener fired with the expected state");
-      browser.test.sendMessage("listenerFired");
-    });
-    browser.idle.setDetectionInterval(99);
-    browser.test.sendMessage("detectionIntervalSet");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  idleService._reset();
-  yield extension.startup();
-  yield extension.awaitMessage("detectionIntervalSet");
-  idleService._fireObservers("idle");
-  yield extension.awaitMessage("listenerFired");
-  checkActivity({expectedAdd: [60, 99], expectedRemove: [60], expectedFires: ["idle"]});
-  yield extension.unload();
-});
-
-add_task(function* testOnlyAddingListener() {
-  function background() {
-    browser.idle.onStateChanged.addListener(newState => {
-      browser.test.assertEq("active", newState, "listener fired with the expected state");
-      browser.test.sendMessage("listenerFired");
-    });
-    browser.test.sendMessage("listenerAdded");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["idle"],
-    },
-  });
-
-  idleService._reset();
-  yield extension.startup();
-  yield extension.awaitMessage("listenerAdded");
-  idleService._fireObservers("active");
-  yield extension.awaitMessage("listenerFired");
-  // check that "idle-daily" topic does not cause a listener to fire
-  idleService._fireObservers("idle-daily");
-  checkActivity({expectedAdd: [60], expectedRemove: [], expectedFires: ["active", "idle-daily"]});
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_json_parser.js b/toolkit/components/webextensions/test/xpcshell/test_ext_json_parser.js
deleted file mode 100644
index 652f41315..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_json_parser.js
+++ /dev/null
@@ -1,37 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_json_parser() {
-  const ID = "json@test.web.extension";
-
-  let xpi = Extension.generateXPI({
-    files: {
-      "manifest.json": String.raw`{
-        // This is a manifest.
-        "applications": {"gecko": {"id": "${ID}"}},
-        "name": "This \" is // not a comment",
-        "version": "0.1\\" // , "description": "This is not a description"
-      }`,
-    },
-  });
-
-  let expectedManifest = {
-    "applications": {"gecko": {"id": ID}},
-    "name": "This \" is // not a comment",
-    "version": "0.1\\",
-  };
-
-  let fileURI = Services.io.newFileURI(xpi);
-  let uri = NetUtil.newURI(`jar:${fileURI.spec}!/`);
-
-  let extension = new ExtensionData(uri);
-
-  yield extension.readManifest();
-
-  Assert.deepEqual(extension.rawManifest, expectedManifest,
-                   "Manifest with correctly-filtered comments");
-
-  Services.obs.notifyObservers(xpi, "flush-cache-entry", null);
-  xpi.remove(false);
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_context.js b/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_context.js
deleted file mode 100644
index 770851472..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_context.js
+++ /dev/null
@@ -1,168 +0,0 @@
-"use strict";
-
-/* globals browser */
-
-Cu.import("resource://gre/modules/Extension.jsm");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-
-const {LegacyExtensionContext} = Cu.import("resource://gre/modules/LegacyExtensionsUtils.jsm");
-
-/**
- * This test case ensures that LegacyExtensionContext instances:
- *  - expose the expected API object and can join the messaging
- *    of a webextension given its addon id
- *  - the exposed API object can receive a port related to a `runtime.connect`
- *    Port created in the webextension's background page
- *  - the received Port instance can exchange messages with the background page
- *  - the received Port receive a disconnect event when the webextension is
- *    shutting down
- */
-add_task(function* test_legacy_extension_context() {
-  function background() {
-    let bgURL = window.location.href;
-
-    let extensionInfo = {
-      bgURL,
-      // Extract the assigned uuid from the background page url.
-      uuid: window.location.hostname,
-    };
-
-    browser.test.sendMessage("webextension-ready", extensionInfo);
-
-    let port;
-
-    browser.test.onMessage.addListener(async msg => {
-      if (msg == "do-send-message") {
-        let reply = await browser.runtime.sendMessage("webextension -> legacy_extension message");
-
-        browser.test.assertEq("legacy_extension -> webextension reply", reply,
-                              "Got the expected message from the LegacyExtensionContext");
-        browser.test.sendMessage("got-reply-message");
-      } else if (msg == "do-connect") {
-        port = browser.runtime.connect();
-
-        port.onMessage.addListener(portMsg => {
-          browser.test.assertEq("legacy_extension -> webextension port message", portMsg,
-                                "Got the expected message from the LegacyExtensionContext");
-          port.postMessage("webextension -> legacy_extension port message");
-        });
-      } else if (msg == "do-disconnect") {
-        port.disconnect();
-      }
-    });
-  }
-
-  let extensionData = {
-    background,
-  };
-
-  let extension = Extension.generate(extensionData);
-
-  let waitForExtensionInfo = new Promise((resolve, reject) => {
-    extension.on("test-message", function testMessageListener(kind, msg, ...args) {
-      if (msg != "webextension-ready") {
-        reject(new Error(`Got an unexpected test-message: ${msg}`));
-      } else {
-        extension.off("test-message", testMessageListener);
-        resolve(args[0]);
-      }
-    });
-  });
-
-  // Connect to the target extension as an external context
-  // using the given custom sender info.
-  let legacyContext;
-
-  extension.on("startup", function onStartup() {
-    extension.off("startup", onStartup);
-    legacyContext = new LegacyExtensionContext(extension);
-    extension.callOnClose({
-      close: () => legacyContext.unload(),
-    });
-  });
-
-  yield extension.startup();
-
-  let extensionInfo = yield waitForExtensionInfo;
-
-  equal(legacyContext.envType, "legacy_extension",
-     "LegacyExtensionContext instance has the expected type");
-
-  ok(legacyContext.api, "Got the expected API object");
-  ok(legacyContext.api.browser, "Got the expected browser property");
-
-  let waitMessage = new Promise(resolve => {
-    const {browser} = legacyContext.api;
-    browser.runtime.onMessage.addListener((singleMsg, msgSender) => {
-      resolve({singleMsg, msgSender});
-
-      // Send a reply to the sender.
-      return Promise.resolve("legacy_extension -> webextension reply");
-    });
-  });
-
-  extension.testMessage("do-send-message");
-
-  let {singleMsg, msgSender} = yield waitMessage;
-  equal(singleMsg, "webextension -> legacy_extension message",
-     "Got the expected message");
-  ok(msgSender, "Got a message sender object");
-
-  equal(msgSender.id, extension.id, "The sender has the expected id property");
-  equal(msgSender.url, extensionInfo.bgURL, "The sender has the expected url property");
-
-  // Wait confirmation that the reply has been received.
-  yield new Promise((resolve, reject) => {
-    extension.on("test-message", function testMessageListener(kind, msg, ...args) {
-      if (msg != "got-reply-message") {
-        reject(new Error(`Got an unexpected test-message: ${msg}`));
-      } else {
-        extension.off("test-message", testMessageListener);
-        resolve();
-      }
-    });
-  });
-
-  let waitConnectPort = new Promise(resolve => {
-    let {browser} = legacyContext.api;
-    browser.runtime.onConnect.addListener(port => {
-      resolve(port);
-    });
-  });
-
-  extension.testMessage("do-connect");
-
-  let port = yield waitConnectPort;
-
-  ok(port, "Got the Port API object");
-  ok(port.sender, "The port has a sender property");
-  equal(port.sender.id, extension.id,
-     "The port sender has the expected id property");
-  equal(port.sender.url, extensionInfo.bgURL,
-     "The port sender has the expected url property");
-
-  let waitPortMessage = new Promise(resolve => {
-    port.onMessage.addListener((msg) => {
-      resolve(msg);
-    });
-  });
-
-  port.postMessage("legacy_extension -> webextension port message");
-
-  let msg = yield waitPortMessage;
-
-  equal(msg, "webextension -> legacy_extension port message",
-     "LegacyExtensionContext received the expected message from the webextension");
-
-  let waitForDisconnect = new Promise(resolve => {
-    port.onDisconnect.addListener(resolve);
-  });
-
-  extension.testMessage("do-disconnect");
-
-  yield waitForDisconnect;
-
-  do_print("Got the disconnect event on unload");
-
-  yield extension.shutdown();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_embedding.js b/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_embedding.js
deleted file mode 100644
index ea5d78524..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_embedding.js
+++ /dev/null
@@ -1,188 +0,0 @@
-"use strict";
-
-/* globals browser */
-
-Cu.import("resource://gre/modules/LegacyExtensionsUtils.jsm");
-
-// Import EmbeddedExtensionManager to be able to check that the
-// tacked instances are cleared after the embedded extension shutdown.
-const {
-  EmbeddedExtensionManager,
-} = Cu.import("resource://gre/modules/LegacyExtensionsUtils.jsm", {});
-
-/**
- * This test case ensures that the LegacyExtensionsUtils.EmbeddedExtension:
- *  - load the embedded webextension resources from a "/webextension/" dir
- *    inside the XPI.
- *  - EmbeddedExtension.prototype.api returns an API object which exposes
- *    a working `runtime.onConnect` event object (e.g. the API can receive a port
- *    when the embedded webextension is started  and it can exchange messages
- *    with the background page).
- *  - EmbeddedExtension.prototype.startup/shutdown methods manage the embedded
- *    webextension lifecycle as expected.
- */
-add_task(function* test_embedded_webextension_utils() {
-  function backgroundScript() {
-    let port = browser.runtime.connect();
-
-    port.onMessage.addListener((msg) => {
-      if (msg == "legacy_extension -> webextension") {
-        port.postMessage("webextension -> legacy_extension");
-        port.disconnect();
-      }
-    });
-  }
-
-  const id = "@test.embedded.web.extension";
-
-  // Extensions.generateXPI is used here (and in the other hybrid addons tests in this same
-  // test dir) to be able to generate an xpi with the directory layout that we expect from
-  // an hybrid legacy+webextension addon (where all the embedded webextension resources are
-  // loaded from a 'webextension/' directory).
-  let fakeHybridAddonFile = Extension.generateZipFile({
-    "webextension/manifest.json": {
-      applications: {gecko: {id}},
-      name: "embedded webextension name",
-      manifest_version: 2,
-      version: "1.0",
-      background: {
-        scripts: ["bg.js"],
-      },
-    },
-    "webextension/bg.js": `new ${backgroundScript}`,
-  });
-
-  // Remove the generated xpi file and flush the its jar cache
-  // on cleanup.
-  do_register_cleanup(() => {
-    Services.obs.notifyObservers(fakeHybridAddonFile, "flush-cache-entry", null);
-    fakeHybridAddonFile.remove(false);
-  });
-
-  let fileURI = Services.io.newFileURI(fakeHybridAddonFile);
-  let resourceURI = Services.io.newURI(`jar:${fileURI.spec}!/`, null, null);
-
-  let embeddedExtension = LegacyExtensionsUtils.getEmbeddedExtensionFor({
-    id, resourceURI,
-  });
-
-  ok(embeddedExtension, "Got the embeddedExtension object");
-
-  equal(EmbeddedExtensionManager.embeddedExtensionsByAddonId.size, 1,
-        "Got the expected number of tracked embedded extension instances");
-
-  do_print("waiting embeddedExtension.startup");
-  let embeddedExtensionAPI = yield embeddedExtension.startup();
-  ok(embeddedExtensionAPI, "Got the embeddedExtensionAPI object");
-
-  let waitConnectPort = new Promise(resolve => {
-    let {browser} = embeddedExtensionAPI;
-    browser.runtime.onConnect.addListener(port => {
-      resolve(port);
-    });
-  });
-
-  let port = yield waitConnectPort;
-
-  ok(port, "Got the Port API object");
-
-  let waitPortMessage = new Promise(resolve => {
-    port.onMessage.addListener((msg) => {
-      resolve(msg);
-    });
-  });
-
-  port.postMessage("legacy_extension -> webextension");
-
-  let msg = yield waitPortMessage;
-
-  equal(msg, "webextension -> legacy_extension",
-     "LegacyExtensionContext received the expected message from the webextension");
-
-  let waitForDisconnect = new Promise(resolve => {
-    port.onDisconnect.addListener(resolve);
-  });
-
-  do_print("Wait for the disconnect port event");
-  yield waitForDisconnect;
-  do_print("Got the disconnect port event");
-
-  yield embeddedExtension.shutdown();
-
-  equal(EmbeddedExtensionManager.embeddedExtensionsByAddonId.size, 0,
-        "EmbeddedExtension instances has been untracked from the EmbeddedExtensionManager");
-});
-
-function* createManifestErrorTestCase(id, xpi, expectedError) {
-  // Remove the generated xpi file and flush the its jar cache
-  // on cleanup.
-  do_register_cleanup(() => {
-    Services.obs.notifyObservers(xpi, "flush-cache-entry", null);
-    xpi.remove(false);
-  });
-
-  let fileURI = Services.io.newFileURI(xpi);
-  let resourceURI = Services.io.newURI(`jar:${fileURI.spec}!/`, null, null);
-
-  let embeddedExtension = LegacyExtensionsUtils.getEmbeddedExtensionFor({
-    id, resourceURI,
-  });
-
-  yield Assert.rejects(embeddedExtension.startup(), expectedError,
-                       "embedded extension startup rejected");
-
-  // Shutdown a "never-started" addon with an embedded webextension should not
-  // raise any exception, and if it does this test will fail.
-  yield embeddedExtension.shutdown();
-}
-
-add_task(function* test_startup_error_empty_manifest() {
-  const id = "empty-manifest@test.embedded.web.extension";
-  const files = {
-    "webextension/manifest.json": ``,
-  };
-  const expectedError = "(NS_BASE_STREAM_CLOSED)";
-
-  let fakeHybridAddonFile = Extension.generateZipFile(files);
-
-  yield createManifestErrorTestCase(id, fakeHybridAddonFile, expectedError);
-});
-
-add_task(function* test_startup_error_invalid_json_manifest() {
-  const id = "invalid-json-manifest@test.embedded.web.extension";
-  const files = {
-    "webextension/manifest.json": `{ "name": }`,
-  };
-  const expectedError = "JSON.parse:";
-
-  let fakeHybridAddonFile = Extension.generateZipFile(files);
-
-  yield createManifestErrorTestCase(id, fakeHybridAddonFile, expectedError);
-});
-
-add_task(function* test_startup_error_blocking_validation_errors() {
-  const id = "blocking-manifest-validation-error@test.embedded.web.extension";
-  const files = {
-    "webextension/manifest.json": {
-      name: "embedded webextension name",
-      manifest_version: 2,
-      version: "1.0",
-      background: {
-        scripts: {},
-      },
-    },
-  };
-
-  function expectedError(actual) {
-    if (actual.errors && actual.errors.length == 1 &&
-        actual.errors[0].startsWith("Reading manifest:")) {
-      return true;
-    }
-
-    return false;
-  }
-
-  let fakeHybridAddonFile = Extension.generateZipFile(files);
-
-  yield createManifestErrorTestCase(id, fakeHybridAddonFile, expectedError);
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_localStorage.js b/toolkit/components/webextensions/test/xpcshell/test_ext_localStorage.js
deleted file mode 100644
index 0f0b41085..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_localStorage.js
+++ /dev/null
@@ -1,50 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-function backgroundScript() {
-  let hasRun = localStorage.getItem("has-run");
-  let result;
-  if (!hasRun) {
-    localStorage.setItem("has-run", "yup");
-    localStorage.setItem("test-item", "item1");
-    result = "item1";
-  } else {
-    let data = localStorage.getItem("test-item");
-    if (data == "item1") {
-      localStorage.setItem("test-item", "item2");
-      result = "item2";
-    } else if (data == "item2") {
-      localStorage.removeItem("test-item");
-      result = "deleted";
-    } else if (!data) {
-      localStorage.clear();
-      result = "cleared";
-    }
-  }
-  browser.test.sendMessage("result", result);
-  browser.test.notifyPass("localStorage");
-}
-
-const ID = "test-webextension@mozilla.com";
-let extensionData = {
-  manifest: {applications: {gecko: {id: ID}}},
-  background: backgroundScript,
-};
-
-add_task(function* test_localStorage() {
-  const RESULTS = ["item1", "item2", "deleted", "cleared", "item1"];
-
-  for (let expected of RESULTS) {
-    let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-    yield extension.startup();
-
-    let actual = yield extension.awaitMessage("result");
-
-    yield extension.awaitFinish("localStorage");
-    yield extension.unload();
-
-    equal(actual, expected, "got expected localStorage data");
-  }
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_management.js b/toolkit/components/webextensions/test/xpcshell/test_ext_management.js
deleted file mode 100644
index b19554a57..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_management.js
+++ /dev/null
@@ -1,20 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_management_schema() {
-  function background() {
-    browser.test.assertTrue(browser.management, "browser.management API exists");
-    browser.test.notifyPass("management-schema");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["management"],
-    },
-    background: `(${background})()`,
-  });
-  yield extension.startup();
-  yield extension.awaitFinish("management-schema");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_management_uninstall_self.js b/toolkit/components/webextensions/test/xpcshell/test_ext_management_uninstall_self.js
deleted file mode 100644
index 7d80a9c23..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_management_uninstall_self.js
+++ /dev/null
@@ -1,135 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://gre/modules/AddonManager.jsm");
-Cu.import("resource://testing-common/AddonTestUtils.jsm");
-Cu.import("resource://testing-common/MockRegistrar.jsm");
-
-const {promiseAddonByID} = AddonTestUtils;
-const id = "uninstall_self_test@tests.mozilla.com";
-
-const manifest = {
-  applications: {
-    gecko: {
-      id,
-    },
-  },
-  name: "test extension name",
-  version: "1.0",
-};
-
-const waitForUninstalled = () => new Promise(resolve => {
-  const listener = {
-    onUninstalled: (addon) => {
-      equal(addon.id, id, "The expected add-on has been uninstalled");
-      AddonManager.getAddonByID(addon.id, checkedAddon => {
-        equal(checkedAddon, null, "Add-on no longer exists");
-        AddonManager.removeAddonListener(listener);
-        resolve();
-      });
-    },
-  };
-  AddonManager.addAddonListener(listener);
-});
-
-let promptService = {
-  _response: null,
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsIPromptService]),
-  confirmEx: function(...args) {
-    this._confirmExArgs = args;
-    return this._response;
-  },
-};
-
-add_task(function* setup() {
-  let fakePromptService = MockRegistrar.register("@mozilla.org/embedcomp/prompt-service;1", promptService);
-  do_register_cleanup(() => {
-    MockRegistrar.unregister(fakePromptService);
-  });
-  yield ExtensionTestUtils.startAddonManager();
-});
-
-add_task(function* test_management_uninstall_no_prompt() {
-  function background() {
-    browser.test.onMessage.addListener(msg => {
-      browser.management.uninstallSelf();
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest,
-    background,
-    useAddonManager: "temporary",
-  });
-
-  yield extension.startup();
-  let addon = yield promiseAddonByID(id);
-  notEqual(addon, null, "Add-on is installed");
-  extension.sendMessage("uninstall");
-  yield waitForUninstalled();
-  yield extension.markUnloaded();
-  Services.obs.notifyObservers(extension.extension.file, "flush-cache-entry", null);
-});
-
-add_task(function* test_management_uninstall_prompt_uninstall() {
-  promptService._response = 0;
-
-  function background() {
-    browser.test.onMessage.addListener(msg => {
-      browser.management.uninstallSelf({showConfirmDialog: true});
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest,
-    background,
-    useAddonManager: "temporary",
-  });
-
-  yield extension.startup();
-  let addon = yield promiseAddonByID(id);
-  notEqual(addon, null, "Add-on is installed");
-  extension.sendMessage("uninstall");
-  yield waitForUninstalled();
-  yield extension.markUnloaded();
-
-  // Test localization strings
-  equal(promptService._confirmExArgs[1], `Uninstall ${manifest.name}`);
-  equal(promptService._confirmExArgs[2],
-        `The extension “${manifest.name}� is requesting to be uninstalled. What would you like to do?`);
-  equal(promptService._confirmExArgs[4], "Uninstall");
-  equal(promptService._confirmExArgs[5], "Keep Installed");
-  Services.obs.notifyObservers(extension.extension.file, "flush-cache-entry", null);
-});
-
-add_task(function* test_management_uninstall_prompt_keep() {
-  promptService._response = 1;
-
-  function background() {
-    browser.test.onMessage.addListener(async msg => {
-      await browser.test.assertRejects(
-        browser.management.uninstallSelf({showConfirmDialog: true}),
-        "User cancelled uninstall of extension",
-        "Expected rejection when user declines uninstall");
-
-      browser.test.sendMessage("uninstall-rejected");
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest,
-    background,
-    useAddonManager: "temporary",
-  });
-
-  yield extension.startup();
-  let addon = yield promiseAddonByID(id);
-  notEqual(addon, null, "Add-on is installed");
-  extension.sendMessage("uninstall");
-  yield extension.awaitMessage("uninstall-rejected");
-  addon = yield promiseAddonByID(id);
-  notEqual(addon, null, "Add-on remains installed");
-  yield extension.unload();
-  Services.obs.notifyObservers(extension.extension.file, "flush-cache-entry", null);
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_content_security_policy.js b/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_content_security_policy.js
deleted file mode 100644
index 2b0084980..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_content_security_policy.js
+++ /dev/null
@@ -1,30 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-
-add_task(function* test_manifest_csp() {
-  let normalized = yield ExtensionTestUtils.normalizeManifest({
-    "content_security_policy": "script-src 'self'; object-src 'none'",
-  });
-
-  equal(normalized.error, undefined, "Should not have an error");
-  equal(normalized.errors.length, 0, "Should not have warnings");
-  equal(normalized.value.content_security_policy,
-        "script-src 'self'; object-src 'none'",
-        "Should have the expected poilcy string");
-
-
-  normalized = yield ExtensionTestUtils.normalizeManifest({
-    "content_security_policy": "object-src 'none'",
-  });
-
-  equal(normalized.error, undefined, "Should not have an error");
-
-  Assert.deepEqual(normalized.errors,
-                   ["Error processing content_security_policy: SyntaxError: Policy is missing a required \u2018script-src\u2019 directive"],
-                   "Should have the expected warning");
-
-  equal(normalized.value.content_security_policy, null,
-        "Invalid policy string should be omitted");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_incognito.js b/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_incognito.js
deleted file mode 100644
index 94649692e..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_incognito.js
+++ /dev/null
@@ -1,27 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-
-add_task(function* test_manifest_incognito() {
-  let normalized = yield ExtensionTestUtils.normalizeManifest({
-    "incognito": "spanning",
-  });
-
-  equal(normalized.error, undefined, "Should not have an error");
-  equal(normalized.errors.length, 0, "Should not have warnings");
-  equal(normalized.value.incognito,
-        "spanning",
-        "Should have the expected incognito string");
-
-  normalized = yield ExtensionTestUtils.normalizeManifest({
-    "incognito": "split",
-  });
-
-  equal(normalized.error, undefined, "Should not have an error");
-  Assert.deepEqual(normalized.errors,
-                   ['Error processing incognito: Invalid enumeration value "split"'],
-                   "Should have the expected warning");
-  equal(normalized.value.incognito, null,
-        "Invalid incognito string should be omitted");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_minimum_chrome_version.js b/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_minimum_chrome_version.js
deleted file mode 100644
index fad5661bb..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_manifest_minimum_chrome_version.js
+++ /dev/null
@@ -1,13 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-
-add_task(function* test_manifest_minimum_chrome_version() {
-  let normalized = yield ExtensionTestUtils.normalizeManifest({
-    "minimum_chrome_version": "42",
-  });
-
-  equal(normalized.error, undefined, "Should not have an error");
-  equal(normalized.errors.length, 0, "Should not have warnings");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging.js b/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging.js
deleted file mode 100644
index 5a6b628f5..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging.js
+++ /dev/null
@@ -1,514 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-/* globals chrome */
-
-const PREF_MAX_READ = "webextensions.native-messaging.max-input-message-bytes";
-const PREF_MAX_WRITE = "webextensions.native-messaging.max-output-message-bytes";
-
-const ECHO_BODY = String.raw`
-  import struct
-  import sys
-
-  while True:
-      rawlen = sys.stdin.read(4)
-      if len(rawlen) == 0:
-          sys.exit(0)
-      msglen = struct.unpack('@I', rawlen)[0]
-      msg = sys.stdin.read(msglen)
-
-      sys.stdout.write(struct.pack('@I', msglen))
-      sys.stdout.write(msg)
-`;
-
-const INFO_BODY = String.raw`
-  import json
-  import os
-  import struct
-  import sys
-
-  msg = json.dumps({"args": sys.argv, "cwd": os.getcwd()})
-  sys.stdout.write(struct.pack('@I', len(msg)))
-  sys.stdout.write(msg)
-  sys.exit(0)
-`;
-
-const STDERR_LINES = ["hello stderr", "this should be a separate line"];
-let STDERR_MSG = STDERR_LINES.join("\\n");
-
-const STDERR_BODY = String.raw`
-  import sys
-  sys.stderr.write("${STDERR_MSG}")
-`;
-
-const SCRIPTS = [
-  {
-    name: "echo",
-    description: "a native app that echoes back messages it receives",
-    script: ECHO_BODY.replace(/^ {2}/gm, ""),
-  },
-  {
-    name: "info",
-    description: "a native app that gives some info about how it was started",
-    script: INFO_BODY.replace(/^ {2}/gm, ""),
-  },
-  {
-    name: "stderr",
-    description: "a native app that writes to stderr and then exits",
-    script: STDERR_BODY.replace(/^ {2}/gm, ""),
-  },
-];
-
-add_task(function* setup() {
-  yield setupHosts(SCRIPTS);
-});
-
-// Test the basic operation of native messaging with a simple
-// script that echoes back whatever message is sent to it.
-add_task(function* test_happy_path() {
-  function background() {
-    let port = browser.runtime.connectNative("echo");
-    port.onMessage.addListener(msg => {
-      browser.test.sendMessage("message", msg);
-    });
-    browser.test.onMessage.addListener((what, payload) => {
-      if (what == "send") {
-        if (payload._json) {
-          let json = payload._json;
-          payload.toJSON = () => json;
-          delete payload._json;
-        }
-        port.postMessage(payload);
-      }
-    });
-    browser.test.sendMessage("ready");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-  const tests = [
-    {
-      data: "this is a string",
-      what: "simple string",
-    },
-    {
-      data: "Это юникода",
-      what: "unicode string",
-    },
-    {
-      data: {test: "hello"},
-      what: "simple object",
-    },
-    {
-      data: {
-        what: "An object with a few properties",
-        number: 123,
-        bool: true,
-        nested: {what: "another object"},
-      },
-      what: "object with several properties",
-    },
-
-    {
-      data: {
-        ignoreme: true,
-        _json: {data: "i have a tojson method"},
-      },
-      expected: {data: "i have a tojson method"},
-      what: "object with toJSON() method",
-    },
-  ];
-  for (let test of tests) {
-    extension.sendMessage("send", test.data);
-    let response = yield extension.awaitMessage("message");
-    let expected = test.expected || test.data;
-    deepEqual(response, expected, `Echoed a message of type ${test.what}`);
-  }
-
-  let procCount = yield getSubprocessCount();
-  equal(procCount, 1, "subprocess is still running");
-  let exitPromise = waitForSubprocessExit();
-  yield extension.unload();
-  yield exitPromise;
-});
-
-if (AppConstants.platform == "win") {
-  // "relative.echo" has a relative path in the host manifest.
-  add_task(function* test_relative_path() {
-    function background() {
-      let port = browser.runtime.connectNative("relative.echo");
-      let MSG = "test relative echo path";
-      port.onMessage.addListener(msg => {
-        browser.test.assertEq(MSG, msg, "Got expected message back");
-        browser.test.sendMessage("done");
-      });
-      port.postMessage(MSG);
-    }
-
-    let extension = ExtensionTestUtils.loadExtension({
-      background,
-      manifest: {
-        applications: {gecko: {id: ID}},
-        permissions: ["nativeMessaging"],
-      },
-    });
-
-    yield extension.startup();
-    yield extension.awaitMessage("done");
-
-    let procCount = yield getSubprocessCount();
-    equal(procCount, 1, "subprocess is still running");
-    let exitPromise = waitForSubprocessExit();
-    yield extension.unload();
-    yield exitPromise;
-  });
-}
-
-// Test sendNativeMessage()
-add_task(function* test_sendNativeMessage() {
-  async function background() {
-    let MSG = {test: "hello world"};
-
-    // Check error handling
-    await browser.test.assertRejects(
-      browser.runtime.sendNativeMessage("nonexistent", MSG),
-      /Attempt to postMessage on disconnected port/,
-      "sendNativeMessage() to a nonexistent app failed");
-
-    // Check regular message exchange
-    let reply = await browser.runtime.sendNativeMessage("echo", MSG);
-
-    let expected = JSON.stringify(MSG);
-    let received = JSON.stringify(reply);
-    browser.test.assertEq(expected, received, "Received echoed native message");
-
-    browser.test.sendMessage("finished");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("finished");
-
-  // With sendNativeMessage(), the subprocess should be disconnected
-  // after exchanging a single message.
-  yield waitForSubprocessExit();
-
-  yield extension.unload();
-});
-
-// Test calling Port.disconnect()
-add_task(function* test_disconnect() {
-  function background() {
-    let port = browser.runtime.connectNative("echo");
-    port.onMessage.addListener((msg, msgPort) => {
-      browser.test.assertEq(port, msgPort, "onMessage handler should receive the port as the second argument");
-      browser.test.sendMessage("message", msg);
-    });
-    port.onDisconnect.addListener(msgPort => {
-      browser.test.fail("onDisconnect should not be called for disconnect()");
-    });
-    browser.test.onMessage.addListener((what, payload) => {
-      if (what == "send") {
-        if (payload._json) {
-          let json = payload._json;
-          payload.toJSON = () => json;
-          delete payload._json;
-        }
-        port.postMessage(payload);
-      } else if (what == "disconnect") {
-        try {
-          port.disconnect();
-          browser.test.sendMessage("disconnect-result", {success: true});
-        } catch (err) {
-          browser.test.sendMessage("disconnect-result", {
-            success: false,
-            errmsg: err.message,
-          });
-        }
-      }
-    });
-    browser.test.sendMessage("ready");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage("send", "test");
-  let response = yield extension.awaitMessage("message");
-  equal(response, "test", "Echoed a string");
-
-  let procCount = yield getSubprocessCount();
-  equal(procCount, 1, "subprocess is running");
-
-  extension.sendMessage("disconnect");
-  response = yield extension.awaitMessage("disconnect-result");
-  equal(response.success, true, "disconnect succeeded");
-
-  do_print("waiting for subprocess to exit");
-  yield waitForSubprocessExit();
-  procCount = yield getSubprocessCount();
-  equal(procCount, 0, "subprocess is no longer running");
-
-  extension.sendMessage("disconnect");
-  response = yield extension.awaitMessage("disconnect-result");
-  equal(response.success, true, "second call to disconnect silently ignored");
-
-  yield extension.unload();
-});
-
-// Test the limit on message size for writing
-add_task(function* test_write_limit() {
-  Services.prefs.setIntPref(PREF_MAX_WRITE, 10);
-  function clearPref() {
-    Services.prefs.clearUserPref(PREF_MAX_WRITE);
-  }
-  do_register_cleanup(clearPref);
-
-  function background() {
-    const PAYLOAD = "0123456789A";
-    let port = browser.runtime.connectNative("echo");
-    try {
-      port.postMessage(PAYLOAD);
-      browser.test.sendMessage("result", null);
-    } catch (ex) {
-      browser.test.sendMessage("result", ex.message);
-    }
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-
-  let errmsg = yield extension.awaitMessage("result");
-  notEqual(errmsg, null, "native postMessage() failed for overly large message");
-
-  yield extension.unload();
-  yield waitForSubprocessExit();
-
-  clearPref();
-});
-
-// Test the limit on message size for reading
-add_task(function* test_read_limit() {
-  Services.prefs.setIntPref(PREF_MAX_READ, 10);
-  function clearPref() {
-    Services.prefs.clearUserPref(PREF_MAX_READ);
-  }
-  do_register_cleanup(clearPref);
-
-  function background() {
-    const PAYLOAD = "0123456789A";
-    let port = browser.runtime.connectNative("echo");
-    port.onDisconnect.addListener(msgPort => {
-      browser.test.assertEq(port, msgPort, "onDisconnect handler should receive the port as the first argument");
-      browser.test.assertEq("Native application tried to send a message of 13 bytes, which exceeds the limit of 10 bytes.", port.error && port.error.message);
-      browser.test.sendMessage("result", "disconnected");
-    });
-    port.onMessage.addListener(msg => {
-      browser.test.sendMessage("result", "message");
-    });
-    port.postMessage(PAYLOAD);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-
-  let result = yield extension.awaitMessage("result");
-  equal(result, "disconnected", "native port disconnected on receiving large message");
-
-  yield extension.unload();
-  yield waitForSubprocessExit();
-
-  clearPref();
-});
-
-// Test that an extension without the nativeMessaging permission cannot
-// use native messaging.
-add_task(function* test_ext_permission() {
-  function background() {
-    browser.test.assertFalse("connectNative" in chrome.runtime, "chrome.runtime.connectNative does not exist without nativeMessaging permission");
-    browser.test.assertFalse("connectNative" in browser.runtime, "browser.runtime.connectNative does not exist without nativeMessaging permission");
-    browser.test.assertFalse("sendNativeMessage" in chrome.runtime, "chrome.runtime.sendNativeMessage does not exist without nativeMessaging permission");
-    browser.test.assertFalse("sendNativeMessage" in browser.runtime, "browser.runtime.sendNativeMessage does not exist without nativeMessaging permission");
-    browser.test.sendMessage("finished");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {},
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("finished");
-  yield extension.unload();
-});
-
-// Test that an extension that is not listed in allowed_extensions for
-// a native application cannot use that application.
-add_task(function* test_app_permission() {
-  function background() {
-    let port = browser.runtime.connectNative("echo");
-    port.onDisconnect.addListener(msgPort => {
-      browser.test.assertEq(port, msgPort, "onDisconnect handler should receive the port as the first argument");
-      browser.test.assertEq("This extension does not have permission to use native application echo (or the application is not installed)", port.error && port.error.message);
-      browser.test.sendMessage("result", "disconnected");
-    });
-    port.onMessage.addListener(msg => {
-      browser.test.sendMessage("result", "message");
-    });
-    port.postMessage({test: "test"});
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      permissions: ["nativeMessaging"],
-    },
-  }, "somethingelse@tests.mozilla.org");
-
-  yield extension.startup();
-
-  let result = yield extension.awaitMessage("result");
-  equal(result, "disconnected", "connectNative() failed without native app permission");
-
-  yield extension.unload();
-
-  let procCount = yield getSubprocessCount();
-  equal(procCount, 0, "No child process was started");
-});
-
-// Test that the command-line arguments and working directory for the
-// native application are as expected.
-add_task(function* test_child_process() {
-  function background() {
-    let port = browser.runtime.connectNative("info");
-    port.onMessage.addListener(msg => {
-      browser.test.sendMessage("result", msg);
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-
-  let msg = yield extension.awaitMessage("result");
-  equal(msg.args.length, 2, "Received one command line argument");
-  equal(msg.args[1], getPath("info.json"), "Command line argument is the path to the native host manifest");
-  equal(msg.cwd.replace(/^\/private\//, "/"), tmpDir.path,
-        "Working directory is the directory containing the native appliation");
-
-  let exitPromise = waitForSubprocessExit();
-  yield extension.unload();
-  yield exitPromise;
-});
-
-add_task(function* test_stderr() {
-  function background() {
-    let port = browser.runtime.connectNative("stderr");
-    port.onDisconnect.addListener(msgPort => {
-      browser.test.assertEq(port, msgPort, "onDisconnect handler should receive the port as the first argument");
-      browser.test.assertEq(null, port.error, "Normal application exit is not an error");
-      browser.test.sendMessage("finished");
-    });
-  }
-
-  let {messages} = yield promiseConsoleOutput(function* () {
-    let extension = ExtensionTestUtils.loadExtension({
-      background,
-      manifest: {
-        applications: {gecko: {id: ID}},
-        permissions: ["nativeMessaging"],
-      },
-    });
-
-    yield extension.startup();
-    yield extension.awaitMessage("finished");
-    yield extension.unload();
-
-    yield waitForSubprocessExit();
-  });
-
-  let lines = STDERR_LINES.map(line => messages.findIndex(msg => msg.message.includes(line)));
-  notEqual(lines[0], -1, "Saw first line of stderr output on the console");
-  notEqual(lines[1], -1, "Saw second line of stderr output on the console");
-  notEqual(lines[0], lines[1], "Stderr output lines are separated in the console");
-});
-
-// Test that calling connectNative() multiple times works
-// (bug 1313980 was a previous regression in this area)
-add_task(function* test_multiple_connects() {
-  async function background() {
-    function once() {
-      return new Promise(resolve => {
-        let MSG = "hello";
-        let port = browser.runtime.connectNative("echo");
-
-        port.onMessage.addListener(msg => {
-          browser.test.assertEq(MSG, msg, "Got expected message back");
-          port.disconnect();
-          resolve();
-        });
-        port.postMessage(MSG);
-      });
-    }
-
-    await once();
-    await once();
-    browser.test.notifyPass("multiple-connect");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("multiple-connect");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_perf.js b/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_perf.js
deleted file mode 100644
index 693f67dde..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_perf.js
+++ /dev/null
@@ -1,128 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-XPCOMUtils.defineLazyModuleGetter(this, "MockRegistry",
-                                  "resource://testing-common/MockRegistry.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "OS",
-                                  "resource://gre/modules/osfile.jsm");
-
-Cu.import("resource://gre/modules/Subprocess.jsm");
-
-const MAX_ROUND_TRIP_TIME_MS = AppConstants.DEBUG || AppConstants.ASAN ? 36 : 18;
-const MAX_RETRIES = 5;
-
-
-const ECHO_BODY = String.raw`
-  import struct
-  import sys
-
-  while True:
-      rawlen = sys.stdin.read(4)
-      if len(rawlen) == 0:
-          sys.exit(0)
-
-      msglen = struct.unpack('@I', rawlen)[0]
-      msg = sys.stdin.read(msglen)
-
-      sys.stdout.write(struct.pack('@I', msglen))
-      sys.stdout.write(msg)
-`;
-
-const SCRIPTS = [
-  {
-    name: "echo",
-    description: "A native app that echoes back messages it receives",
-    script: ECHO_BODY.replace(/^ {2}/gm, ""),
-  },
-];
-
-add_task(function* setup() {
-  yield setupHosts(SCRIPTS);
-});
-
-add_task(function* test_round_trip_perf() {
-  let extension = ExtensionTestUtils.loadExtension({
-    background() {
-      browser.test.onMessage.addListener(msg => {
-        if (msg != "run-tests") {
-          return;
-        }
-
-        let port = browser.runtime.connectNative("echo");
-
-        function next() {
-          port.postMessage({
-            "Lorem": {
-              "ipsum": {
-                "dolor": [
-                  "sit amet",
-                  "consectetur adipiscing elit",
-                  "sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
-                ],
-                "Ut enim": [
-                  "ad minim veniam",
-                  "quis nostrud exercitation ullamco",
-                  "laboris nisi ut aliquip ex ea commodo consequat.",
-                ],
-                "Duis": [
-                  "aute irure dolor in reprehenderit in",
-                  "voluptate velit esse cillum dolore eu",
-                  "fugiat nulla pariatur.",
-                ],
-                "Excepteur": [
-                  "sint occaecat cupidatat non proident",
-                  "sunt in culpa qui officia deserunt",
-                  "mollit anim id est laborum.",
-                ],
-              },
-            },
-          });
-        }
-
-        const COUNT = 1000;
-        let now;
-        function finish() {
-          let roundTripTime = (Date.now() - now) / COUNT;
-
-          port.disconnect();
-          browser.test.sendMessage("result", roundTripTime);
-        }
-
-        let count = 0;
-        port.onMessage.addListener(() => {
-          if (count == 0) {
-            // Skip the first round, since it includes the time it takes
-            // the app to start up.
-            now = Date.now();
-          }
-
-          if (count++ <= COUNT) {
-            next();
-          } else {
-            finish();
-          }
-        });
-
-        next();
-      });
-    },
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-
-  let roundTripTime = Infinity;
-  for (let i = 0; i < MAX_RETRIES && roundTripTime > MAX_ROUND_TRIP_TIME_MS; i++) {
-    extension.sendMessage("run-tests");
-    roundTripTime = yield extension.awaitMessage("result");
-  }
-
-  yield extension.unload();
-
-  ok(roundTripTime <= MAX_ROUND_TRIP_TIME_MS,
-     `Expected round trip time (${roundTripTime}ms) to be less than ${MAX_ROUND_TRIP_TIME_MS}ms`);
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_unresponsive.js b/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_unresponsive.js
deleted file mode 100644
index a75a1d49d..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_native_messaging_unresponsive.js
+++ /dev/null
@@ -1,82 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-const WONTDIE_BODY = String.raw`
-  import signal
-  import struct
-  import sys
-  import time
-
-  signal.signal(signal.SIGTERM, signal.SIG_IGN)
-
-  def spin():
-      while True:
-          try:
-              signal.pause()
-          except AttributeError:
-              time.sleep(5)
-
-  while True:
-      rawlen = sys.stdin.read(4)
-      if len(rawlen) == 0:
-          spin()
-
-      msglen = struct.unpack('@I', rawlen)[0]
-      msg = sys.stdin.read(msglen)
-
-      sys.stdout.write(struct.pack('@I', msglen))
-      sys.stdout.write(msg)
-`;
-
-const SCRIPTS = [
-  {
-    name: "wontdie",
-    description: "a native app that does not exit when stdin closes or on SIGTERM",
-    script: WONTDIE_BODY.replace(/^ {2}/gm, ""),
-  },
-];
-
-add_task(function* setup() {
-  yield setupHosts(SCRIPTS);
-});
-
-
-// Test that an unresponsive native application still gets killed eventually
-add_task(function* test_unresponsive_native_app() {
-  // XXX expose GRACEFUL_SHUTDOWN_TIME as a pref and reduce it
-  // just for this test?
-
-  function background() {
-    let port = browser.runtime.connectNative("wontdie");
-
-    const MSG = "echo me";
-    // bounce a message to make sure the process actually starts
-    port.onMessage.addListener(msg => {
-      browser.test.assertEq(msg, MSG, "Received echoed message");
-      browser.test.sendMessage("ready");
-    });
-    port.postMessage(MSG);
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    manifest: {
-      applications: {gecko: {id: ID}},
-      permissions: ["nativeMessaging"],
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  let procCount = yield getSubprocessCount();
-  equal(procCount, 1, "subprocess is running");
-
-  let exitPromise = waitForSubprocessExit();
-  yield extension.unload();
-  yield exitPromise;
-
-  procCount = yield getSubprocessCount();
-  equal(procCount, 0, "subprocess was succesfully killed");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_onmessage_removelistener.js b/toolkit/components/webextensions/test/xpcshell/test_ext_onmessage_removelistener.js
deleted file mode 100644
index 6f8b553fc..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_onmessage_removelistener.js
+++ /dev/null
@@ -1,30 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-function backgroundScript() {
-  function listener() {
-    browser.test.notifyFail("listener should not be invoked");
-  }
-
-  browser.runtime.onMessage.addListener(listener);
-  browser.runtime.onMessage.removeListener(listener);
-  browser.runtime.sendMessage("hello");
-
-  // Make sure that, if we somehow fail to remove the listener, then we'll run
-  // the listener before the test is marked as passing.
-  setTimeout(function() {
-    browser.test.notifyPass("onmessage_removelistener");
-  }, 0);
-}
-
-let extensionData = {
-  background: backgroundScript,
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitFinish("onmessage_removelistener");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_connect_no_receiver.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_connect_no_receiver.js
deleted file mode 100644
index 2a1342cde..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_connect_no_receiver.js
+++ /dev/null
@@ -1,23 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_connect_without_listener() {
-  function background() {
-    let port = browser.runtime.connect();
-    port.onDisconnect.addListener(() => {
-      browser.test.assertEq("Could not establish connection. Receiving end does not exist.", port.error && port.error.message);
-      browser.test.notifyPass("port.onDisconnect was called");
-    });
-  }
-  let extensionData = {
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitFinish("port.onDisconnect was called");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getBrowserInfo.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getBrowserInfo.js
deleted file mode 100644
index a280206fa..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getBrowserInfo.js
+++ /dev/null
@@ -1,26 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-"use strict";
-
-add_task(function* setup() {
-  ExtensionTestUtils.mockAppInfo();
-});
-
-add_task(function* test_getBrowserInfo() {
-  async function background() {
-    let info = await browser.runtime.getBrowserInfo();
-
-    browser.test.assertEq(info.name, "XPCShell", "name is valid");
-    browser.test.assertEq(info.vendor, "Mozilla", "vendor is Mozilla");
-    browser.test.assertEq(info.version, "48", "version is correct");
-    browser.test.assertEq(info.buildID, "20160315", "buildID is correct");
-
-    browser.test.notifyPass("runtime.getBrowserInfo");
-  }
-
-  const extension = ExtensionTestUtils.loadExtension({background});
-  yield extension.startup();
-  yield extension.awaitFinish("runtime.getBrowserInfo");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getPlatformInfo.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getPlatformInfo.js
deleted file mode 100644
index 29bad0c10..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_getPlatformInfo.js
+++ /dev/null
@@ -1,25 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-function backgroundScript() {
-  browser.runtime.getPlatformInfo(info => {
-    let validOSs = ["mac", "win", "android", "cros", "linux", "openbsd"];
-    let validArchs = ["arm", "x86-32", "x86-64"];
-
-    browser.test.assertTrue(validOSs.indexOf(info.os) != -1, "OS is valid");
-    browser.test.assertTrue(validArchs.indexOf(info.arch) != -1, "Architecture is valid");
-    browser.test.notifyPass("runtime.getPlatformInfo");
-  });
-}
-
-let extensionData = {
-  background: backgroundScript,
-};
-
-add_task(function* test_contentscript() {
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitFinish("runtime.getPlatformInfo");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_onInstalled_and_onStartup.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_onInstalled_and_onStartup.js
deleted file mode 100644
index fa6461412..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_onInstalled_and_onStartup.js
+++ /dev/null
@@ -1,337 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-XPCOMUtils.defineLazyGetter(this, "Management", () => {
-  const {Management} = Cu.import("resource://gre/modules/Extension.jsm", {});
-  return Management;
-});
-
-const {
-  createAppInfo,
-  createTempWebExtensionFile,
-  promiseAddonByID,
-  promiseAddonEvent,
-  promiseCompleteAllInstalls,
-  promiseFindAddonUpdates,
-  promiseRestartManager,
-  promiseShutdownManager,
-  promiseStartupManager,
-} = AddonTestUtils;
-
-AddonTestUtils.init(this);
-
-// Allow for unsigned addons.
-AddonTestUtils.overrideCertDB();
-
-createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "42");
-
-function awaitEvent(eventName) {
-  return new Promise(resolve => {
-    let listener = (_eventName, ...args) => {
-      if (_eventName === eventName) {
-        Management.off(eventName, listener);
-        resolve(...args);
-      }
-    };
-
-    Management.on(eventName, listener);
-  });
-}
-
-function background() {
-  let onInstalledDetails = null;
-  let onStartupFired = false;
-
-  browser.runtime.onInstalled.addListener(details => {
-    onInstalledDetails = details;
-  });
-
-  browser.runtime.onStartup.addListener(() => {
-    onStartupFired = true;
-  });
-
-  browser.test.onMessage.addListener(message => {
-    if (message === "get-on-installed-details") {
-      onInstalledDetails = onInstalledDetails || {fired: false};
-      browser.test.sendMessage("on-installed-details", onInstalledDetails);
-    } else if (message === "did-on-startup-fire") {
-      browser.test.sendMessage("on-startup-fired", onStartupFired);
-    } else if (message === "reload-extension") {
-      browser.runtime.reload();
-    }
-  });
-
-  browser.runtime.onUpdateAvailable.addListener(details => {
-    browser.test.sendMessage("reloading");
-    browser.runtime.reload();
-  });
-}
-
-function* expectEvents(extension, {onStartupFired, onInstalledFired, onInstalledReason}) {
-  extension.sendMessage("get-on-installed-details");
-  let details = yield extension.awaitMessage("on-installed-details");
-  if (onInstalledFired) {
-    equal(details.reason, onInstalledReason, "runtime.onInstalled fired with the correct reason");
-  } else {
-    equal(details.fired, onInstalledFired, "runtime.onInstalled should not have fired");
-  }
-
-  extension.sendMessage("did-on-startup-fire");
-  let fired = yield extension.awaitMessage("on-startup-fired");
-  equal(fired, onStartupFired, `Expected runtime.onStartup to ${onStartupFired ? "" : "not "} fire`);
-}
-
-add_task(function* test_should_fire_on_addon_update() {
-  const EXTENSION_ID = "test_runtime_on_installed_addon_update@tests.mozilla.org";
-
-  const PREF_EM_CHECK_UPDATE_SECURITY = "extensions.checkUpdateSecurity";
-
-  // The test extension uses an insecure update url.
-  Services.prefs.setBoolPref(PREF_EM_CHECK_UPDATE_SECURITY, false);
-
-  const testServer = createHttpServer();
-  const port = testServer.identity.primaryPort;
-
-  let extension = ExtensionTestUtils.loadExtension({
-    useAddonManager: "permanent",
-    manifest: {
-      "version": "1.0",
-      "applications": {
-        "gecko": {
-          "id": EXTENSION_ID,
-          "update_url": `http://localhost:${port}/test_update.json`,
-        },
-      },
-    },
-    background,
-  });
-
-  testServer.registerPathHandler("/test_update.json", (request, response) => {
-    response.write(`{
-      "addons": {
-        "${EXTENSION_ID}": {
-          "updates": [
-            {
-              "version": "2.0",
-              "update_link": "http://localhost:${port}/addons/test_runtime_on_installed-2.0.xpi"
-            }
-          ]
-        }
-      }
-    }`);
-  });
-
-  let webExtensionFile = createTempWebExtensionFile({
-    manifest: {
-      version: "2.0",
-      applications: {
-        gecko: {
-          id: EXTENSION_ID,
-        },
-      },
-    },
-    background,
-  });
-
-  testServer.registerFile("/addons/test_runtime_on_installed-2.0.xpi", webExtensionFile);
-
-  yield promiseStartupManager();
-
-  yield extension.startup();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: true,
-    onInstalledReason: "install",
-  });
-
-  let addon = yield promiseAddonByID(EXTENSION_ID);
-  equal(addon.version, "1.0", "The installed addon has the correct version");
-
-  let update = yield promiseFindAddonUpdates(addon);
-  let install = update.updateAvailable;
-
-  let promiseInstalled = promiseAddonEvent("onInstalled");
-  yield promiseCompleteAllInstalls([install]);
-
-  yield extension.awaitMessage("reloading");
-
-  let startupPromise = awaitEvent("ready");
-
-  let [updated_addon] = yield promiseInstalled;
-  equal(updated_addon.version, "2.0", "The updated addon has the correct version");
-
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: true,
-    onInstalledReason: "update",
-  });
-
-  yield extension.unload();
-
-  yield updated_addon.uninstall();
-  yield promiseShutdownManager();
-});
-
-add_task(function* test_should_fire_on_browser_update() {
-  const EXTENSION_ID = "test_runtime_on_installed_browser_update@tests.mozilla.org";
-
-  yield promiseStartupManager();
-
-  let extension = ExtensionTestUtils.loadExtension({
-    useAddonManager: "permanent",
-    manifest: {
-      "version": "1.0",
-      "applications": {
-        "gecko": {
-          "id": EXTENSION_ID,
-        },
-      },
-    },
-    background,
-  });
-
-  yield extension.startup();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: true,
-    onInstalledReason: "install",
-  });
-
-  let startupPromise = awaitEvent("ready");
-  yield promiseRestartManager("1");
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: true,
-    onInstalledFired: false,
-  });
-
-  // Update the browser.
-  startupPromise = awaitEvent("ready");
-  yield promiseRestartManager("2");
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: true,
-    onInstalledFired: true,
-    onInstalledReason: "browser_update",
-  });
-
-  // Restart the browser.
-  startupPromise = awaitEvent("ready");
-  yield promiseRestartManager("2");
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: true,
-    onInstalledFired: false,
-  });
-
-  // Update the browser again.
-  startupPromise = awaitEvent("ready");
-  yield promiseRestartManager("3");
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: true,
-    onInstalledFired: true,
-    onInstalledReason: "browser_update",
-  });
-
-  yield extension.unload();
-
-  yield promiseShutdownManager();
-});
-
-add_task(function* test_should_not_fire_on_reload() {
-  const EXTENSION_ID = "test_runtime_on_installed_reload@tests.mozilla.org";
-
-  yield promiseStartupManager();
-
-  let extension = ExtensionTestUtils.loadExtension({
-    useAddonManager: "permanent",
-    manifest: {
-      "version": "1.0",
-      "applications": {
-        "gecko": {
-          "id": EXTENSION_ID,
-        },
-      },
-    },
-    background,
-  });
-
-  yield extension.startup();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: true,
-    onInstalledReason: "install",
-  });
-
-  let startupPromise = awaitEvent("ready");
-  extension.sendMessage("reload-extension");
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: false,
-  });
-
-  yield extension.unload();
-  yield promiseShutdownManager();
-});
-
-add_task(function* test_should_not_fire_on_restart() {
-  const EXTENSION_ID = "test_runtime_on_installed_restart@tests.mozilla.org";
-
-  yield promiseStartupManager();
-
-  let extension = ExtensionTestUtils.loadExtension({
-    useAddonManager: "permanent",
-    manifest: {
-      "version": "1.0",
-      "applications": {
-        "gecko": {
-          "id": EXTENSION_ID,
-        },
-      },
-    },
-    background,
-  });
-
-  yield extension.startup();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: true,
-    onInstalledReason: "install",
-  });
-
-  let addon = yield promiseAddonByID(EXTENSION_ID);
-  addon.userDisabled = true;
-
-  let startupPromise = awaitEvent("ready");
-  addon.userDisabled = false;
-  extension.extension = yield startupPromise;
-  extension.attachListeners();
-
-  yield expectEvents(extension, {
-    onStartupFired: false,
-    onInstalledFired: false,
-  });
-
-  yield extension.markUnloaded();
-  yield promiseShutdownManager();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage.js
deleted file mode 100644
index fec8e13dd..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage.js
+++ /dev/null
@@ -1,79 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* tabsSendMessageReply() {
-  function background() {
-    browser.runtime.onMessage.addListener((msg, sender, respond) => {
-      if (msg == "respond-now") {
-        respond(msg);
-      } else if (msg == "respond-soon") {
-        setTimeout(() => { respond(msg); }, 0);
-        return true;
-      } else if (msg == "respond-promise") {
-        return Promise.resolve(msg);
-      } else if (msg == "respond-never") {
-        return;
-      } else if (msg == "respond-error") {
-        return Promise.reject(new Error(msg));
-      } else if (msg == "throw-error") {
-        throw new Error(msg);
-      }
-    });
-
-    browser.runtime.onMessage.addListener((msg, sender, respond) => {
-      if (msg == "respond-now") {
-        respond("hello");
-      } else if (msg == "respond-now-2") {
-        respond(msg);
-      }
-    });
-
-    let childFrame = document.createElement("iframe");
-    childFrame.src = "extensionpage.html";
-    document.body.appendChild(childFrame);
-  }
-
-  function senderScript() {
-    Promise.all([
-      browser.runtime.sendMessage("respond-now"),
-      browser.runtime.sendMessage("respond-now-2"),
-      new Promise(resolve => browser.runtime.sendMessage("respond-soon", resolve)),
-      browser.runtime.sendMessage("respond-promise"),
-      browser.runtime.sendMessage("respond-never"),
-      new Promise(resolve => {
-        browser.runtime.sendMessage("respond-never", response => { resolve(response); });
-      }),
-
-      browser.runtime.sendMessage("respond-error").catch(error => Promise.resolve({error})),
-      browser.runtime.sendMessage("throw-error").catch(error => Promise.resolve({error})),
-    ]).then(([respondNow, respondNow2, respondSoon, respondPromise, respondNever, respondNever2, respondError, throwError]) => {
-      browser.test.assertEq("respond-now", respondNow, "Got the expected immediate response");
-      browser.test.assertEq("respond-now-2", respondNow2, "Got the expected immediate response from the second listener");
-      browser.test.assertEq("respond-soon", respondSoon, "Got the expected delayed response");
-      browser.test.assertEq("respond-promise", respondPromise, "Got the expected promise response");
-      browser.test.assertEq(undefined, respondNever, "Got the expected no-response resolution");
-      browser.test.assertEq(undefined, respondNever2, "Got the expected no-response resolution");
-
-      browser.test.assertEq("respond-error", respondError.error.message, "Got the expected error response");
-      browser.test.assertEq("throw-error", throwError.error.message, "Got the expected thrown error response");
-
-      browser.test.notifyPass("sendMessage");
-    }).catch(e => {
-      browser.test.fail(`Error: ${e} :: ${e.stack}`);
-      browser.test.notifyFail("sendMessage");
-    });
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    background,
-    files: {
-      "senderScript.js": senderScript,
-      "extensionpage.html": `<!DOCTYPE html><meta charset="utf-8"><script src="senderScript.js"></script>`,
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("sendMessage");
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_errors.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_errors.js
deleted file mode 100644
index f1a8d5a36..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_errors.js
+++ /dev/null
@@ -1,59 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_sendMessage_error() {
-  async function background() {
-    let circ = {};
-    circ.circ = circ;
-    let testCases = [
-      // [arguments, expected error string],
-      [[], "runtime.sendMessage's message argument is missing"],
-      [[null, null, null, null], "runtime.sendMessage's last argument is not a function"],
-      [[null, null, 1], "runtime.sendMessage's options argument is invalid"],
-      [[1, null, null], "runtime.sendMessage's extensionId argument is invalid"],
-      [[null, null, null, null, null], "runtime.sendMessage received too many arguments"],
-
-      // Even when the parameters are accepted, we still expect an error
-      // because there is no onMessage listener.
-      [[null, null, null], "Could not establish connection. Receiving end does not exist."],
-
-      // Structural cloning doesn't work with DOM but we fall back
-      // JSON serialization, so we don't expect another error.
-      [[null, location, null], "Could not establish connection. Receiving end does not exist."],
-
-      // Structured cloning supports cyclic self-references.
-      [[null, [circ, location], null], "cyclic object value"],
-      // JSON serialization does not support cyclic references.
-      [[null, circ, null], "Could not establish connection. Receiving end does not exist."],
-      // (the last two tests shows whether sendMessage is implemented as structured cloning).
-    ];
-
-    // Repeat all tests with the undefined value instead of null.
-    for (let [args, expectedError] of testCases.slice()) {
-      args = args.map(arg => arg === null ? undefined : arg);
-      testCases.push([args, expectedError]);
-    }
-
-    for (let [args, expectedError] of testCases) {
-      let description = `runtime.sendMessage(${args.map(String).join(", ")})`;
-
-      await browser.test.assertRejects(
-        browser.runtime.sendMessage(...args),
-        expectedError,
-        `expected error message for ${description}`);
-    }
-
-    browser.test.notifyPass("sendMessage parameter validation");
-  }
-  let extensionData = {
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitFinish("sendMessage parameter validation");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_no_receiver.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_no_receiver.js
deleted file mode 100644
index f906333d2..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_no_receiver.js
+++ /dev/null
@@ -1,54 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_sendMessage_without_listener() {
-  async function background() {
-    await browser.test.assertRejects(
-      browser.runtime.sendMessage("msg"),
-      "Could not establish connection. Receiving end does not exist.",
-      "sendMessage callback was invoked");
-
-    browser.test.notifyPass("sendMessage callback was invoked");
-  }
-  let extensionData = {
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitFinish("sendMessage callback was invoked");
-
-  yield extension.unload();
-});
-
-add_task(function* test_chrome_sendMessage_without_listener() {
-  function background() {
-    /* globals chrome */
-    browser.test.assertEq(null, chrome.runtime.lastError, "no lastError before call");
-    let retval = chrome.runtime.sendMessage("msg");
-    browser.test.assertEq(null, chrome.runtime.lastError, "no lastError after call");
-    browser.test.assertEq(undefined, retval, "return value of chrome.runtime.sendMessage without callback");
-
-    let isAsyncCall = false;
-    retval = chrome.runtime.sendMessage("msg", reply => {
-      browser.test.assertEq(undefined, reply, "no reply");
-      browser.test.assertTrue(isAsyncCall, "chrome.runtime.sendMessage's callback must be called asynchronously");
-      browser.test.assertEq(undefined, retval, "return value of chrome.runtime.sendMessage with callback");
-      browser.test.assertEq("Could not establish connection. Receiving end does not exist.", chrome.runtime.lastError.message);
-      browser.test.notifyPass("finished chrome.runtime.sendMessage");
-    });
-    isAsyncCall = true;
-  }
-  let extensionData = {
-    background,
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitFinish("finished chrome.runtime.sendMessage");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_self.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_self.js
deleted file mode 100644
index e4f5e951f..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_self.js
+++ /dev/null
@@ -1,51 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-
-"use strict";
-
-add_task(function* test_sendMessage_to_self_should_not_trigger_onMessage() {
-  async function background() {
-    browser.runtime.onMessage.addListener(msg => {
-      browser.test.assertEq("msg from child", msg);
-      browser.test.notifyPass("sendMessage did not call same-frame onMessage");
-    });
-
-    browser.test.onMessage.addListener(msg => {
-      browser.test.assertEq("sendMessage with a listener in another frame", msg);
-      browser.runtime.sendMessage("should only reach another frame");
-    });
-
-    await browser.test.assertRejects(
-      browser.runtime.sendMessage("should not trigger same-frame onMessage"),
-      "Could not establish connection. Receiving end does not exist.");
-
-    let anotherFrame = document.createElement("iframe");
-    anotherFrame.src = browser.extension.getURL("extensionpage.html");
-    document.body.appendChild(anotherFrame);
-  }
-
-  function lastScript() {
-    browser.runtime.onMessage.addListener(msg => {
-      browser.test.assertEq("should only reach another frame", msg);
-      browser.runtime.sendMessage("msg from child");
-    });
-    browser.test.sendMessage("sendMessage callback called");
-  }
-
-  let extensionData = {
-    background,
-    files: {
-      "lastScript.js": lastScript,
-      "extensionpage.html": `<!DOCTYPE html><meta charset="utf-8"><script src="lastScript.js"></script>`,
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-
-  yield extension.awaitMessage("sendMessage callback called");
-  extension.sendMessage("sendMessage with a listener in another frame");
-  yield extension.awaitFinish("sendMessage did not call same-frame onMessage");
-
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas.js b/toolkit/components/webextensions/test/xpcshell/test_ext_schemas.js
deleted file mode 100644
index d838be5b5..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas.js
+++ /dev/null
@@ -1,1427 +0,0 @@
-"use strict";
-
-Components.utils.import("resource://gre/modules/Schemas.jsm");
-Components.utils.import("resource://gre/modules/BrowserUtils.jsm");
-Components.utils.import("resource://gre/modules/ExtensionCommon.jsm");
-
-let {LocalAPIImplementation, SchemaAPIInterface} = ExtensionCommon;
-
-let json = [
-  {namespace: "testing",
-
-   properties: {
-     PROP1: {value: 20},
-     prop2: {type: "string"},
-     prop3: {
-       $ref: "submodule",
-     },
-     prop4: {
-       $ref: "submodule",
-       unsupported: true,
-     },
-   },
-
-   types: [
-     {
-       id: "type1",
-       type: "string",
-       "enum": ["value1", "value2", "value3"],
-     },
-
-     {
-       id: "type2",
-       type: "object",
-       properties: {
-         prop1: {type: "integer"},
-         prop2: {type: "array", items: {"$ref": "type1"}},
-       },
-     },
-
-     {
-       id: "basetype1",
-       type: "object",
-       properties: {
-         prop1: {type: "string"},
-       },
-     },
-
-     {
-       id: "basetype2",
-       choices: [
-         {type: "integer"},
-       ],
-     },
-
-     {
-       $extend: "basetype1",
-       properties: {
-         prop2: {type: "string"},
-       },
-     },
-
-     {
-       $extend: "basetype2",
-       choices: [
-         {type: "string"},
-       ],
-     },
-
-     {
-       id: "submodule",
-       type: "object",
-       functions: [
-         {
-           name: "sub_foo",
-           type: "function",
-           parameters: [],
-           returns: "integer",
-         },
-       ],
-     },
-   ],
-
-   functions: [
-     {
-       name: "foo",
-       type: "function",
-       parameters: [
-         {name: "arg1", type: "integer", optional: true, default: 99},
-         {name: "arg2", type: "boolean", optional: true},
-       ],
-     },
-
-     {
-       name: "bar",
-       type: "function",
-       parameters: [
-         {name: "arg1", type: "integer", optional: true},
-         {name: "arg2", type: "boolean"},
-       ],
-     },
-
-     {
-       name: "baz",
-       type: "function",
-       parameters: [
-         {name: "arg1", type: "object", properties: {
-           prop1: {type: "string"},
-           prop2: {type: "integer", optional: true},
-           prop3: {type: "integer", unsupported: true},
-         }},
-       ],
-     },
-
-     {
-       name: "qux",
-       type: "function",
-       parameters: [
-         {name: "arg1", "$ref": "type1"},
-       ],
-     },
-
-     {
-       name: "quack",
-       type: "function",
-       parameters: [
-         {name: "arg1", "$ref": "type2"},
-       ],
-     },
-
-     {
-       name: "quora",
-       type: "function",
-       parameters: [
-         {name: "arg1", type: "function"},
-       ],
-     },
-
-     {
-       name: "quileute",
-       type: "function",
-       parameters: [
-         {name: "arg1", type: "integer", optional: true},
-         {name: "arg2", type: "integer"},
-       ],
-     },
-
-     {
-       name: "queets",
-       type: "function",
-       unsupported: true,
-       parameters: [],
-     },
-
-     {
-       name: "quintuplets",
-       type: "function",
-       parameters: [
-         {name: "obj", type: "object", properties: [], additionalProperties: {type: "integer"}},
-       ],
-     },
-
-     {
-       name: "quasar",
-       type: "function",
-       parameters: [
-         {name: "abc", type: "object", properties: {
-           func: {type: "function", parameters: [
-             {name: "x", type: "integer"},
-           ]},
-         }},
-       ],
-     },
-
-     {
-       name: "quosimodo",
-       type: "function",
-       parameters: [
-         {name: "xyz", type: "object", additionalProperties: {type: "any"}},
-       ],
-     },
-
-     {
-       name: "patternprop",
-       type: "function",
-       parameters: [
-         {
-           name: "obj",
-           type: "object",
-           properties: {"prop1": {type: "string", pattern: "^\\d+$"}},
-           patternProperties: {
-             "(?i)^prop\\d+$": {type: "string"},
-             "^foo\\d+$": {type: "string"},
-           },
-         },
-       ],
-     },
-
-     {
-       name: "pattern",
-       type: "function",
-       parameters: [
-         {name: "arg", type: "string", pattern: "(?i)^[0-9a-f]+$"},
-       ],
-     },
-
-     {
-       name: "format",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           type: "object",
-           properties: {
-             url: {type: "string", "format": "url", "optional": true},
-             relativeUrl: {type: "string", "format": "relativeUrl", "optional": true},
-             strictRelativeUrl: {type: "string", "format": "strictRelativeUrl", "optional": true},
-           },
-         },
-       ],
-     },
-
-     {
-       name: "formatDate",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           type: "object",
-           properties: {
-             date: {type: "string", format: "date", optional: true},
-           },
-         },
-       ],
-     },
-
-     {
-       name: "deep",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           type: "object",
-           properties: {
-             foo: {
-               type: "object",
-               properties: {
-                 bar: {
-                   type: "array",
-                   items: {
-                     type: "object",
-                     properties: {
-                       baz: {
-                         type: "object",
-                         properties: {
-                           required: {type: "integer"},
-                           optional: {type: "string", optional: true},
-                         },
-                       },
-                     },
-                   },
-                 },
-               },
-             },
-           },
-         },
-       ],
-     },
-
-     {
-       name: "errors",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           type: "object",
-           properties: {
-             warn: {
-               type: "string",
-               pattern: "^\\d+$",
-               optional: true,
-               onError: "warn",
-             },
-             ignore: {
-               type: "string",
-               pattern: "^\\d+$",
-               optional: true,
-               onError: "ignore",
-             },
-             default: {
-               type: "string",
-               pattern: "^\\d+$",
-               optional: true,
-             },
-           },
-         },
-       ],
-     },
-
-     {
-       name: "localize",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           type: "object",
-           properties: {
-             foo: {type: "string", "preprocess": "localize", "optional": true},
-             bar: {type: "string", "optional": true},
-             url: {type: "string", "preprocess": "localize", "format": "url", "optional": true},
-           },
-         },
-       ],
-     },
-
-     {
-       name: "extended1",
-       type: "function",
-       parameters: [
-         {name: "val", $ref: "basetype1"},
-       ],
-     },
-
-     {
-       name: "extended2",
-       type: "function",
-       parameters: [
-         {name: "val", $ref: "basetype2"},
-       ],
-     },
-   ],
-
-   events: [
-     {
-       name: "onFoo",
-       type: "function",
-     },
-
-     {
-       name: "onBar",
-       type: "function",
-       extraParameters: [{
-         name: "filter",
-         type: "integer",
-         optional: true,
-         default: 1,
-       }],
-     },
-   ],
-  },
-  {
-    namespace: "foreign",
-    properties: {
-      foreignRef: {$ref: "testing.submodule"},
-    },
-  },
-  {
-    namespace: "inject",
-    properties: {
-      PROP1: {value: "should inject"},
-    },
-  },
-  {
-    namespace: "do-not-inject",
-    properties: {
-      PROP1: {value: "should not inject"},
-    },
-  },
-];
-
-let tallied = null;
-
-function tally(kind, ns, name, args) {
-  tallied = [kind, ns, name, args];
-}
-
-function verify(...args) {
-  do_check_eq(JSON.stringify(tallied), JSON.stringify(args));
-  tallied = null;
-}
-
-let talliedErrors = [];
-
-function checkErrors(errors) {
-  do_check_eq(talliedErrors.length, errors.length, "Got expected number of errors");
-  for (let [i, error] of errors.entries()) {
-    do_check_true(i in talliedErrors && talliedErrors[i].includes(error),
-                  `${JSON.stringify(error)} is a substring of error ${JSON.stringify(talliedErrors[i])}`);
-  }
-
-  talliedErrors.length = 0;
-}
-
-let permissions = new Set();
-
-class TallyingAPIImplementation extends SchemaAPIInterface {
-  constructor(namespace, name) {
-    super();
-    this.namespace = namespace;
-    this.name = name;
-  }
-
-  callFunction(args) {
-    tally("call", this.namespace, this.name, args);
-  }
-
-  callFunctionNoReturn(args) {
-    tally("call", this.namespace, this.name, args);
-  }
-
-  getProperty() {
-    tally("get", this.namespace, this.name);
-  }
-
-  setProperty(value) {
-    tally("set", this.namespace, this.name, value);
-  }
-
-  addListener(listener, args) {
-    tally("addListener", this.namespace, this.name, [listener, args]);
-  }
-
-  removeListener(listener) {
-    tally("removeListener", this.namespace, this.name, [listener]);
-  }
-
-  hasListener(listener) {
-    tally("hasListener", this.namespace, this.name, [listener]);
-  }
-}
-
-let wrapper = {
-  url: "moz-extension://b66e3509-cdb3-44f6-8eb8-c8b39b3a1d27/",
-
-  checkLoadURL(url) {
-    return !url.startsWith("chrome:");
-  },
-
-  preprocessors: {
-    localize(value, context) {
-      return value.replace(/__MSG_(.*?)__/g, (m0, m1) => `${m1.toUpperCase()}`);
-    },
-  },
-
-  logError(message) {
-    talliedErrors.push(message);
-  },
-
-  hasPermission(permission) {
-    return permissions.has(permission);
-  },
-
-  shouldInject(ns) {
-    return ns != "do-not-inject";
-  },
-
-  getImplementation(namespace, name) {
-    return new TallyingAPIImplementation(namespace, name);
-  },
-};
-
-add_task(function* () {
-  let url = "data:," + JSON.stringify(json);
-  yield Schemas.load(url);
-
-  let root = {};
-  tallied = null;
-  Schemas.inject(root, wrapper);
-  do_check_eq(tallied, null);
-
-  do_check_eq(root.testing.PROP1, 20, "simple value property");
-  do_check_eq(root.testing.type1.VALUE1, "value1", "enum type");
-  do_check_eq(root.testing.type1.VALUE2, "value2", "enum type");
-
-  do_check_eq("inject" in root, true, "namespace 'inject' should be injected");
-  do_check_eq("do-not-inject" in root, false, "namespace 'do-not-inject' should not be injected");
-
-  root.testing.foo(11, true);
-  verify("call", "testing", "foo", [11, true]);
-
-  root.testing.foo(true);
-  verify("call", "testing", "foo", [99, true]);
-
-  root.testing.foo(null, true);
-  verify("call", "testing", "foo", [99, true]);
-
-  root.testing.foo(undefined, true);
-  verify("call", "testing", "foo", [99, true]);
-
-  root.testing.foo(11);
-  verify("call", "testing", "foo", [11, null]);
-
-  Assert.throws(() => root.testing.bar(11),
-                /Incorrect argument types/,
-                "should throw without required arg");
-
-  Assert.throws(() => root.testing.bar(11, true, 10),
-                /Incorrect argument types/,
-                "should throw with too many arguments");
-
-  root.testing.bar(true);
-  verify("call", "testing", "bar", [null, true]);
-
-  root.testing.baz({prop1: "hello", prop2: 22});
-  verify("call", "testing", "baz", [{prop1: "hello", prop2: 22}]);
-
-  root.testing.baz({prop1: "hello"});
-  verify("call", "testing", "baz", [{prop1: "hello", prop2: null}]);
-
-  root.testing.baz({prop1: "hello", prop2: null});
-  verify("call", "testing", "baz", [{prop1: "hello", prop2: null}]);
-
-  Assert.throws(() => root.testing.baz({prop2: 12}),
-                /Property "prop1" is required/,
-                "should throw without required property");
-
-  Assert.throws(() => root.testing.baz({prop1: "hi", prop3: 12}),
-                /Property "prop3" is unsupported by Firefox/,
-                "should throw with unsupported property");
-
-  Assert.throws(() => root.testing.baz({prop1: "hi", prop4: 12}),
-                /Unexpected property "prop4"/,
-                "should throw with unexpected property");
-
-  Assert.throws(() => root.testing.baz({prop1: 12}),
-                /Expected string instead of 12/,
-                "should throw with wrong type");
-
-  root.testing.qux("value2");
-  verify("call", "testing", "qux", ["value2"]);
-
-  Assert.throws(() => root.testing.qux("value4"),
-                /Invalid enumeration value "value4"/,
-                "should throw for invalid enum value");
-
-  root.testing.quack({prop1: 12, prop2: ["value1", "value3"]});
-  verify("call", "testing", "quack", [{prop1: 12, prop2: ["value1", "value3"]}]);
-
-  Assert.throws(() => root.testing.quack({prop1: 12, prop2: ["value1", "value3", "value4"]}),
-                /Invalid enumeration value "value4"/,
-                "should throw for invalid array type");
-
-  function f() {}
-  root.testing.quora(f);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["call", "testing", "quora"]));
-  do_check_eq(tallied[3][0], f);
-  tallied = null;
-
-  let g = () => 0;
-  root.testing.quora(g);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["call", "testing", "quora"]));
-  do_check_eq(tallied[3][0], g);
-  tallied = null;
-
-  root.testing.quileute(10);
-  verify("call", "testing", "quileute", [null, 10]);
-
-  Assert.throws(() => root.testing.queets(),
-                /queets is not a function/,
-                "should throw for unsupported functions");
-
-  root.testing.quintuplets({a: 10, b: 20, c: 30});
-  verify("call", "testing", "quintuplets", [{a: 10, b: 20, c: 30}]);
-
-  Assert.throws(() => root.testing.quintuplets({a: 10, b: 20, c: 30, d: "hi"}),
-                /Expected integer instead of "hi"/,
-                "should throw for wrong additionalProperties type");
-
-  root.testing.quasar({func: f});
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["call", "testing", "quasar"]));
-  do_check_eq(tallied[3][0].func, f);
-  tallied = null;
-
-  root.testing.quosimodo({a: 10, b: 20, c: 30});
-  verify("call", "testing", "quosimodo", [{a: 10, b: 20, c: 30}]);
-  tallied = null;
-
-  Assert.throws(() => root.testing.quosimodo(10),
-                /Incorrect argument types/,
-                "should throw for wrong type");
-
-  root.testing.patternprop({prop1: "12", prop2: "42", Prop3: "43", foo1: "x"});
-  verify("call", "testing", "patternprop", [{prop1: "12", prop2: "42", Prop3: "43", foo1: "x"}]);
-  tallied = null;
-
-  root.testing.patternprop({prop1: "12"});
-  verify("call", "testing", "patternprop", [{prop1: "12"}]);
-  tallied = null;
-
-  Assert.throws(() => root.testing.patternprop({prop1: "12", foo1: null}),
-                /Expected string instead of null/,
-                "should throw for wrong property type");
-
-  Assert.throws(() => root.testing.patternprop({prop1: "xx", prop2: "yy"}),
-                /String "xx" must match \/\^\\d\+\$\//,
-                "should throw for wrong property type");
-
-  Assert.throws(() => root.testing.patternprop({prop1: "12", prop2: 42}),
-                /Expected string instead of 42/,
-                "should throw for wrong property type");
-
-  Assert.throws(() => root.testing.patternprop({prop1: "12", prop2: null}),
-                /Expected string instead of null/,
-                "should throw for wrong property type");
-
-  Assert.throws(() => root.testing.patternprop({prop1: "12", propx: "42"}),
-                /Unexpected property "propx"/,
-                "should throw for unexpected property");
-
-  Assert.throws(() => root.testing.patternprop({prop1: "12", Foo1: "x"}),
-                /Unexpected property "Foo1"/,
-                "should throw for unexpected property");
-
-  root.testing.pattern("DEADbeef");
-  verify("call", "testing", "pattern", ["DEADbeef"]);
-  tallied = null;
-
-  Assert.throws(() => root.testing.pattern("DEADcow"),
-                /String "DEADcow" must match \/\^\[0-9a-f\]\+\$\/i/,
-                "should throw for non-match");
-
-  root.testing.format({url: "http://foo/bar",
-                       relativeUrl: "http://foo/bar"});
-  verify("call", "testing", "format", [{url: "http://foo/bar",
-                                        relativeUrl: "http://foo/bar",
-                                        strictRelativeUrl: null}]);
-  tallied = null;
-
-  root.testing.format({relativeUrl: "foo.html", strictRelativeUrl: "foo.html"});
-  verify("call", "testing", "format", [{url: null,
-                                        relativeUrl: `${wrapper.url}foo.html`,
-                                        strictRelativeUrl: `${wrapper.url}foo.html`}]);
-  tallied = null;
-
-  for (let format of ["url", "relativeUrl"]) {
-    Assert.throws(() => root.testing.format({[format]: "chrome://foo/content/"}),
-                  /Access denied/,
-                  "should throw for access denied");
-  }
-
-  for (let urlString of ["//foo.html", "http://foo/bar.html"]) {
-    Assert.throws(() => root.testing.format({strictRelativeUrl: urlString}),
-                  /must be a relative URL/,
-                  "should throw for non-relative URL");
-  }
-
-  const dates = [
-    "2016-03-04",
-    "2016-03-04T08:00:00Z",
-    "2016-03-04T08:00:00.000Z",
-    "2016-03-04T08:00:00-08:00",
-    "2016-03-04T08:00:00.000-08:00",
-    "2016-03-04T08:00:00+08:00",
-    "2016-03-04T08:00:00.000+08:00",
-    "2016-03-04T08:00:00+0800",
-    "2016-03-04T08:00:00-0800",
-  ];
-  dates.forEach(str => {
-    root.testing.formatDate({date: str});
-    verify("call", "testing", "formatDate", [{date: str}]);
-  });
-
-  // Make sure that a trivial change to a valid date invalidates it.
-  dates.forEach(str => {
-    Assert.throws(() => root.testing.formatDate({date: "0" + str}),
-                  /Invalid date string/,
-                  "should throw for invalid iso date string");
-    Assert.throws(() => root.testing.formatDate({date: str + "0"}),
-                  /Invalid date string/,
-                  "should throw for invalid iso date string");
-  });
-
-  const badDates = [
-    "I do not look anything like a date string",
-    "2016-99-99",
-    "2016-03-04T25:00:00Z",
-  ];
-  badDates.forEach(str => {
-    Assert.throws(() => root.testing.formatDate({date: str}),
-                  /Invalid date string/,
-                  "should throw for invalid iso date string");
-  });
-
-  root.testing.deep({foo: {bar: [{baz: {required: 12, optional: "42"}}]}});
-  verify("call", "testing", "deep", [{foo: {bar: [{baz: {required: 12, optional: "42"}}]}}]);
-  tallied = null;
-
-  Assert.throws(() => root.testing.deep({foo: {bar: [{baz: {optional: "42"}}]}}),
-                /Type error for parameter arg \(Error processing foo\.bar\.0\.baz: Property "required" is required\) for testing\.deep/,
-                "should throw with the correct object path");
-
-  Assert.throws(() => root.testing.deep({foo: {bar: [{baz: {required: 12, optional: 42}}]}}),
-                /Type error for parameter arg \(Error processing foo\.bar\.0\.baz\.optional: Expected string instead of 42\) for testing\.deep/,
-                "should throw with the correct object path");
-
-
-  talliedErrors.length = 0;
-
-  root.testing.errors({warn: "0123", ignore: "0123", default: "0123"});
-  verify("call", "testing", "errors", [{warn: "0123", ignore: "0123", default: "0123"}]);
-  checkErrors([]);
-
-  root.testing.errors({warn: "0123", ignore: "x123", default: "0123"});
-  verify("call", "testing", "errors", [{warn: "0123", ignore: null, default: "0123"}]);
-  checkErrors([]);
-
-  root.testing.errors({warn: "x123", ignore: "0123", default: "0123"});
-  verify("call", "testing", "errors", [{warn: null, ignore: "0123", default: "0123"}]);
-  checkErrors([
-    'String "x123" must match /^\\d+$/',
-  ]);
-
-
-  root.testing.onFoo.addListener(f);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["addListener", "testing", "onFoo"]));
-  do_check_eq(tallied[3][0], f);
-  do_check_eq(JSON.stringify(tallied[3][1]), JSON.stringify([]));
-  tallied = null;
-
-  root.testing.onFoo.removeListener(f);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["removeListener", "testing", "onFoo"]));
-  do_check_eq(tallied[3][0], f);
-  tallied = null;
-
-  root.testing.onFoo.hasListener(f);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["hasListener", "testing", "onFoo"]));
-  do_check_eq(tallied[3][0], f);
-  tallied = null;
-
-  Assert.throws(() => root.testing.onFoo.addListener(10),
-                /Invalid listener/,
-                "addListener with non-function should throw");
-
-  root.testing.onBar.addListener(f, 10);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["addListener", "testing", "onBar"]));
-  do_check_eq(tallied[3][0], f);
-  do_check_eq(JSON.stringify(tallied[3][1]), JSON.stringify([10]));
-  tallied = null;
-
-  root.testing.onBar.addListener(f);
-  do_check_eq(JSON.stringify(tallied.slice(0, -1)), JSON.stringify(["addListener", "testing", "onBar"]));
-  do_check_eq(tallied[3][0], f);
-  do_check_eq(JSON.stringify(tallied[3][1]), JSON.stringify([1]));
-  tallied = null;
-
-  Assert.throws(() => root.testing.onBar.addListener(f, "hi"),
-                /Incorrect argument types/,
-                "addListener with wrong extra parameter should throw");
-
-  let target = {prop1: 12, prop2: ["value1", "value3"]};
-  let proxy = new Proxy(target, {});
-  Assert.throws(() => root.testing.quack(proxy),
-                /Expected a plain JavaScript object, got a Proxy/,
-                "should throw when passing a Proxy");
-
-  if (Symbol.toStringTag) {
-    let stringTarget = {prop1: 12, prop2: ["value1", "value3"]};
-    stringTarget[Symbol.toStringTag] = () => "[object Object]";
-    let stringProxy = new Proxy(stringTarget, {});
-    Assert.throws(() => root.testing.quack(stringProxy),
-                  /Expected a plain JavaScript object, got a Proxy/,
-                  "should throw when passing a Proxy");
-  }
-
-
-  root.testing.localize({foo: "__MSG_foo__", bar: "__MSG_foo__", url: "__MSG_http://example.com/__"});
-  verify("call", "testing", "localize", [{foo: "FOO", bar: "__MSG_foo__", url: "http://example.com/"}]);
-  tallied = null;
-
-
-  Assert.throws(() => root.testing.localize({url: "__MSG_/foo/bar__"}),
-                /\/FOO\/BAR is not a valid URL\./,
-                "should throw for invalid URL");
-
-
-  root.testing.extended1({prop1: "foo", prop2: "bar"});
-  verify("call", "testing", "extended1", [{prop1: "foo", prop2: "bar"}]);
-  tallied = null;
-
-  Assert.throws(() => root.testing.extended1({prop1: "foo", prop2: 12}),
-                /Expected string instead of 12/,
-                "should throw for wrong property type");
-
-  Assert.throws(() => root.testing.extended1({prop1: "foo"}),
-                /Property "prop2" is required/,
-                "should throw for missing property");
-
-  Assert.throws(() => root.testing.extended1({prop1: "foo", prop2: "bar", prop3: "xxx"}),
-                /Unexpected property "prop3"/,
-                "should throw for extra property");
-
-
-  root.testing.extended2("foo");
-  verify("call", "testing", "extended2", ["foo"]);
-  tallied = null;
-
-  root.testing.extended2(12);
-  verify("call", "testing", "extended2", [12]);
-  tallied = null;
-
-  Assert.throws(() => root.testing.extended2(true),
-                /Incorrect argument types/,
-                "should throw for wrong argument type");
-
-  root.testing.prop3.sub_foo();
-  verify("call", "testing.prop3", "sub_foo", []);
-  tallied = null;
-
-  Assert.throws(() => root.testing.prop4.sub_foo(),
-                /root.testing.prop4 is undefined/,
-                "should throw for unsupported submodule");
-
-  root.foreign.foreignRef.sub_foo();
-  verify("call", "foreign.foreignRef", "sub_foo", []);
-  tallied = null;
-});
-
-let deprecatedJson = [
-  {namespace: "deprecated",
-
-   properties: {
-     accessor: {
-       type: "string",
-       writable: true,
-       deprecated: "This is not the property you are looking for",
-     },
-   },
-
-   types: [
-     {
-       "id": "Type",
-       "type": "string",
-     },
-   ],
-
-   functions: [
-     {
-       name: "property",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           type: "object",
-           properties: {
-             foo: {
-               type: "string",
-             },
-           },
-           additionalProperties: {
-             type: "any",
-             deprecated: "Unknown property",
-           },
-         },
-       ],
-     },
-
-     {
-       name: "value",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           choices: [
-             {
-               type: "integer",
-             },
-             {
-               type: "string",
-               deprecated: "Please use an integer, not ${value}",
-             },
-           ],
-         },
-       ],
-     },
-
-     {
-       name: "choices",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           deprecated: "You have no choices",
-           choices: [
-             {
-               type: "integer",
-             },
-           ],
-         },
-       ],
-     },
-
-     {
-       name: "ref",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           choices: [
-             {
-               $ref: "Type",
-               deprecated: "Deprecated alias",
-             },
-           ],
-         },
-       ],
-     },
-
-     {
-       name: "method",
-       type: "function",
-       deprecated: "Do not call this method",
-       parameters: [
-       ],
-     },
-   ],
-
-   events: [
-     {
-       name: "onDeprecated",
-       type: "function",
-       deprecated: "This event does not work",
-     },
-   ],
-  },
-];
-
-add_task(function* testDeprecation() {
-  let url = "data:," + JSON.stringify(deprecatedJson);
-  yield Schemas.load(url);
-
-  let root = {};
-  Schemas.inject(root, wrapper);
-
-  talliedErrors.length = 0;
-
-
-  root.deprecated.property({foo: "bar", xxx: "any", yyy: "property"});
-  verify("call", "deprecated", "property", [{foo: "bar", xxx: "any", yyy: "property"}]);
-  checkErrors([
-    "Error processing xxx: Unknown property",
-    "Error processing yyy: Unknown property",
-  ]);
-
-  root.deprecated.value(12);
-  verify("call", "deprecated", "value", [12]);
-  checkErrors([]);
-
-  root.deprecated.value("12");
-  verify("call", "deprecated", "value", ["12"]);
-  checkErrors(["Please use an integer, not \"12\""]);
-
-  root.deprecated.choices(12);
-  verify("call", "deprecated", "choices", [12]);
-  checkErrors(["You have no choices"]);
-
-  root.deprecated.ref("12");
-  verify("call", "deprecated", "ref", ["12"]);
-  checkErrors(["Deprecated alias"]);
-
-  root.deprecated.method();
-  verify("call", "deprecated", "method", []);
-  checkErrors(["Do not call this method"]);
-
-
-  void root.deprecated.accessor;
-  verify("get", "deprecated", "accessor", null);
-  checkErrors(["This is not the property you are looking for"]);
-
-  root.deprecated.accessor = "x";
-  verify("set", "deprecated", "accessor", "x");
-  checkErrors(["This is not the property you are looking for"]);
-
-
-  root.deprecated.onDeprecated.addListener(() => {});
-  checkErrors(["This event does not work"]);
-
-  root.deprecated.onDeprecated.removeListener(() => {});
-  checkErrors(["This event does not work"]);
-
-  root.deprecated.onDeprecated.hasListener(() => {});
-  checkErrors(["This event does not work"]);
-});
-
-
-let choicesJson = [
-  {namespace: "choices",
-
-   types: [
-   ],
-
-   functions: [
-     {
-       name: "meh",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           choices: [
-             {
-               type: "string",
-               enum: ["foo", "bar", "baz"],
-             },
-             {
-               type: "string",
-               pattern: "florg.*meh",
-             },
-             {
-               type: "integer",
-               minimum: 12,
-               maximum: 42,
-             },
-           ],
-         },
-       ],
-     },
-
-     {
-       name: "foo",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           choices: [
-             {
-               type: "object",
-               properties: {
-                 blurg: {
-                   type: "string",
-                   unsupported: true,
-                   optional: true,
-                 },
-               },
-               additionalProperties: {
-                 type: "string",
-               },
-             },
-             {
-               type: "string",
-             },
-             {
-               type: "array",
-               minItems: 2,
-               maxItems: 3,
-               items: {
-                 type: "integer",
-               },
-             },
-           ],
-         },
-       ],
-     },
-
-     {
-       name: "bar",
-       type: "function",
-       parameters: [
-         {
-           name: "arg",
-           choices: [
-             {
-               type: "object",
-               properties: {
-                 baz: {
-                   type: "string",
-                 },
-               },
-             },
-             {
-               type: "array",
-               items: {
-                 type: "integer",
-               },
-             },
-           ],
-         },
-       ],
-     },
-   ]},
-];
-
-add_task(function* testChoices() {
-  let url = "data:," + JSON.stringify(choicesJson);
-  yield Schemas.load(url);
-
-  let root = {};
-  Schemas.inject(root, wrapper);
-
-  talliedErrors.length = 0;
-
-  Assert.throws(() => root.choices.meh("frog"),
-                /Value must either: be one of \["foo", "bar", "baz"\], match the pattern \/florg\.\*meh\/, or be an integer value/);
-
-  Assert.throws(() => root.choices.meh(4),
-                /be a string value, or be at least 12/);
-
-  Assert.throws(() => root.choices.meh(43),
-                /be a string value, or be no greater than 42/);
-
-
-  Assert.throws(() => root.choices.foo([]),
-                /be an object value, be a string value, or have at least 2 items/);
-
-  Assert.throws(() => root.choices.foo([1, 2, 3, 4]),
-                /be an object value, be a string value, or have at most 3 items/);
-
-  Assert.throws(() => root.choices.foo({foo: 12}),
-                /.foo must be a string value, be a string value, or be an array value/);
-
-  Assert.throws(() => root.choices.foo({blurg: "foo"}),
-                /not contain an unsupported "blurg" property, be a string value, or be an array value/);
-
-
-  Assert.throws(() => root.choices.bar({}),
-                /contain the required "baz" property, or be an array value/);
-
-  Assert.throws(() => root.choices.bar({baz: "x", quux: "y"}),
-                /not contain an unexpected "quux" property, or be an array value/);
-
-  Assert.throws(() => root.choices.bar({baz: "x", quux: "y", foo: "z"}),
-                /not contain the unexpected properties \[foo, quux\], or be an array value/);
-});
-
-
-let permissionsJson = [
-  {namespace: "noPerms",
-
-   types: [],
-
-   functions: [
-     {
-       name: "noPerms",
-       type: "function",
-       parameters: [],
-     },
-
-     {
-       name: "fooPerm",
-       type: "function",
-       permissions: ["foo"],
-       parameters: [],
-     },
-   ]},
-
-  {namespace: "fooPerm",
-
-   permissions: ["foo"],
-
-   types: [],
-
-   functions: [
-     {
-       name: "noPerms",
-       type: "function",
-       parameters: [],
-     },
-
-     {
-       name: "fooBarPerm",
-       type: "function",
-       permissions: ["foo.bar"],
-       parameters: [],
-     },
-   ]},
-];
-
-add_task(function* testPermissions() {
-  let url = "data:," + JSON.stringify(permissionsJson);
-  yield Schemas.load(url);
-
-  let root = {};
-  Schemas.inject(root, wrapper);
-
-  equal(typeof root.noPerms, "object", "noPerms namespace should exist");
-  equal(typeof root.noPerms.noPerms, "function", "noPerms.noPerms method should exist");
-
-  ok(!("fooPerm" in root.noPerms), "noPerms.fooPerm should not method exist");
-
-  ok(!("fooPerm" in root), "fooPerm namespace should not exist");
-
-
-  do_print('Add "foo" permission');
-  permissions.add("foo");
-
-  root = {};
-  Schemas.inject(root, wrapper);
-
-  equal(typeof root.noPerms, "object", "noPerms namespace should exist");
-  equal(typeof root.noPerms.noPerms, "function", "noPerms.noPerms method should exist");
-  equal(typeof root.noPerms.fooPerm, "function", "noPerms.fooPerm method should exist");
-
-  equal(typeof root.fooPerm, "object", "fooPerm namespace should exist");
-  equal(typeof root.fooPerm.noPerms, "function", "noPerms.noPerms method should exist");
-
-  ok(!("fooBarPerm" in root.fooPerm), "fooPerm.fooBarPerm method should not exist");
-
-
-  do_print('Add "foo.bar" permission');
-  permissions.add("foo.bar");
-
-  root = {};
-  Schemas.inject(root, wrapper);
-
-  equal(typeof root.noPerms, "object", "noPerms namespace should exist");
-  equal(typeof root.noPerms.noPerms, "function", "noPerms.noPerms method should exist");
-  equal(typeof root.noPerms.fooPerm, "function", "noPerms.fooPerm method should exist");
-
-  equal(typeof root.fooPerm, "object", "fooPerm namespace should exist");
-  equal(typeof root.fooPerm.noPerms, "function", "noPerms.noPerms method should exist");
-  equal(typeof root.fooPerm.fooBarPerm, "function", "noPerms.fooBarPerm method should exist");
-});
-
-let nestedNamespaceJson = [
-  {
-    "namespace": "nested.namespace",
-    "types": [
-      {
-        "id": "CustomType",
-        "type": "object",
-        "events": [
-          {
-            "name": "onEvent",
-          },
-        ],
-        "properties": {
-          "url": {
-            "type": "string",
-          },
-        },
-        "functions": [
-          {
-            "name": "functionOnCustomType",
-            "type": "function",
-            "parameters": [
-              {
-                "name": "title",
-                "type": "string",
-              },
-            ],
-          },
-        ],
-      },
-    ],
-    "properties": {
-      "instanceOfCustomType": {
-        "$ref": "CustomType",
-      },
-    },
-    "functions": [
-      {
-        "name": "create",
-        "type": "function",
-        "parameters": [
-          {
-            "name": "title",
-            "type": "string",
-          },
-        ],
-      },
-    ],
-  },
-];
-
-add_task(function* testNestedNamespace() {
-  let url = "data:," + JSON.stringify(nestedNamespaceJson);
-
-  yield Schemas.load(url);
-
-  let root = {};
-  Schemas.inject(root, wrapper);
-
-  talliedErrors.length = 0;
-
-  ok(root.nested, "The root object contains the first namespace level");
-  ok(root.nested.namespace, "The first level object contains the second namespace level");
-
-  ok(root.nested.namespace.create, "Got the expected function in the nested namespace");
-  do_check_eq(typeof root.nested.namespace.create, "function",
-     "The property is a function as expected");
-
-  let {instanceOfCustomType} = root.nested.namespace;
-
-  ok(instanceOfCustomType,
-     "Got the expected instance of the CustomType defined in the schema");
-  ok(instanceOfCustomType.functionOnCustomType,
-     "Got the expected method in the CustomType instance");
-
-  // TODO: test support events and properties in a SubModuleType defined in the schema,
-  // once implemented, e.g.:
-  //
-  // ok(instanceOfCustomType.url,
-  //    "Got the expected property defined in the CustomType instance)
-  //
-  // ok(instanceOfCustomType.onEvent &&
-  //    instanceOfCustomType.onEvent.addListener &&
-  //    typeof instanceOfCustomType.onEvent.addListener == "function",
-  //    "Got the expected event defined in the CustomType instance");
-});
-
-add_task(function* testLocalAPIImplementation() {
-  let countGet2 = 0;
-  let countProp3 = 0;
-  let countProp3SubFoo = 0;
-
-  let testingApiObj = {
-    get PROP1() {
-      // PROP1 is a schema-defined constant.
-      throw new Error("Unexpected get PROP1");
-    },
-    get prop2() {
-      ++countGet2;
-      return "prop2 val";
-    },
-    get prop3() {
-      throw new Error("Unexpected get prop3");
-    },
-    set prop3(v) {
-      // prop3 is a submodule, defined as a function, so the API should not pass
-      // through assignment to prop3.
-      throw new Error("Unexpected set prop3");
-    },
-  };
-  let submoduleApiObj = {
-    get sub_foo() {
-      ++countProp3;
-      return () => {
-        return ++countProp3SubFoo;
-      };
-    },
-  };
-
-  let localWrapper = {
-    shouldInject(ns) {
-      return ns == "testing" || ns == "testing.prop3";
-    },
-    getImplementation(ns, name) {
-      do_check_true(ns == "testing" || ns == "testing.prop3");
-      if (ns == "testing.prop3" && name == "sub_foo") {
-        // It is fine to use `null` here because we don't call async functions.
-        return new LocalAPIImplementation(submoduleApiObj, name, null);
-      }
-      // It is fine to use `null` here because we don't call async functions.
-      return new LocalAPIImplementation(testingApiObj, name, null);
-    },
-  };
-
-  let root = {};
-  Schemas.inject(root, localWrapper);
-  do_check_eq(countGet2, 0);
-  do_check_eq(countProp3, 0);
-  do_check_eq(countProp3SubFoo, 0);
-
-  do_check_eq(root.testing.PROP1, 20);
-
-  do_check_eq(root.testing.prop2, "prop2 val");
-  do_check_eq(countGet2, 1);
-
-  do_check_eq(root.testing.prop2, "prop2 val");
-  do_check_eq(countGet2, 2);
-
-  do_print(JSON.stringify(root.testing));
-  do_check_eq(root.testing.prop3.sub_foo(), 1);
-  do_check_eq(countProp3, 1);
-  do_check_eq(countProp3SubFoo, 1);
-
-  do_check_eq(root.testing.prop3.sub_foo(), 2);
-  do_check_eq(countProp3, 2);
-  do_check_eq(countProp3SubFoo, 2);
-
-  root.testing.prop3.sub_foo = () => { return "overwritten"; };
-  do_check_eq(root.testing.prop3.sub_foo(), "overwritten");
-
-  root.testing.prop3 = {sub_foo() { return "overwritten again"; }};
-  do_check_eq(root.testing.prop3.sub_foo(), "overwritten again");
-  do_check_eq(countProp3SubFoo, 2);
-});
-
-
-let defaultsJson = [
-  {namespace: "defaultsJson",
-
-   types: [],
-
-   functions: [
-     {
-       name: "defaultFoo",
-       type: "function",
-       parameters: [
-         {name: "arg", type: "object", optional: true, properties: {
-           prop1: {type: "integer", optional: true},
-         }, default: {prop1: 1}},
-       ],
-       returns: {
-         type: "object",
-       },
-     },
-   ]},
-];
-
-add_task(function* testDefaults() {
-  let url = "data:," + JSON.stringify(defaultsJson);
-  yield Schemas.load(url);
-
-  let testingApiObj = {
-    defaultFoo: function(arg) {
-      if (Object.keys(arg) != "prop1") {
-        throw new Error(`Received the expected default object, default: ${JSON.stringify(arg)}`);
-      }
-      arg.newProp = 1;
-      return arg;
-    },
-  };
-
-  let localWrapper = {
-    shouldInject(ns) {
-      return true;
-    },
-    getImplementation(ns, name) {
-      return new LocalAPIImplementation(testingApiObj, name, null);
-    },
-  };
-
-  let root = {};
-  Schemas.inject(root, localWrapper);
-
-  deepEqual(root.defaultsJson.defaultFoo(), {prop1: 1, newProp: 1});
-  deepEqual(root.defaultsJson.defaultFoo({prop1: 2}), {prop1: 2, newProp: 1});
-  deepEqual(root.defaultsJson.defaultFoo(), {prop1: 1, newProp: 1});
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_allowed_contexts.js b/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_allowed_contexts.js
deleted file mode 100644
index 606459764..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_allowed_contexts.js
+++ /dev/null
@@ -1,147 +0,0 @@
-"use strict";
-
-Components.utils.import("resource://gre/modules/Schemas.jsm");
-
-let schemaJson = [
-  {
-    namespace: "noAllowedContexts",
-    properties: {
-      prop1: {type: "object"},
-      prop2: {type: "object", allowedContexts: ["test_zero", "test_one"]},
-      prop3: {type: "number", value: 1},
-      prop4: {type: "number", value: 1, allowedContexts: ["numeric_one"]},
-    },
-  },
-  {
-    namespace: "defaultContexts",
-    defaultContexts: ["test_two"],
-    properties: {
-      prop1: {type: "object"},
-      prop2: {type: "object", allowedContexts: ["test_three"]},
-      prop3: {type: "number", value: 1},
-      prop4: {type: "number", value: 1, allowedContexts: ["numeric_two"]},
-    },
-  },
-  {
-    namespace: "withAllowedContexts",
-    allowedContexts: ["test_four"],
-    properties: {
-      prop1: {type: "object"},
-      prop2: {type: "object", allowedContexts: ["test_five"]},
-      prop3: {type: "number", value: 1},
-      prop4: {type: "number", value: 1, allowedContexts: ["numeric_three"]},
-    },
-  },
-  {
-    namespace: "withAllowedContextsAndDefault",
-    allowedContexts: ["test_six"],
-    defaultContexts: ["test_seven"],
-    properties: {
-      prop1: {type: "object"},
-      prop2: {type: "object", allowedContexts: ["test_eight"]},
-      prop3: {type: "number", value: 1},
-      prop4: {type: "number", value: 1, allowedContexts: ["numeric_four"]},
-    },
-  },
-  {
-    namespace: "with_submodule",
-    defaultContexts: ["test_nine"],
-    types: [{
-      id: "subtype",
-      type: "object",
-      functions: [{
-        name: "noAllowedContexts",
-        type: "function",
-        parameters: [],
-      }, {
-        name: "allowedContexts",
-        allowedContexts: ["test_ten"],
-        type: "function",
-        parameters: [],
-      }],
-    }],
-    properties: {
-      prop1: {$ref: "subtype"},
-      prop2: {$ref: "subtype", allowedContexts: ["test_eleven"]},
-    },
-  },
-];
-add_task(function* testRestrictions() {
-  let url = "data:," + JSON.stringify(schemaJson);
-  yield Schemas.load(url);
-  let results = {};
-  let localWrapper = {
-    shouldInject(ns, name, allowedContexts) {
-      name = name === null ? ns : ns + "." + name;
-      results[name] = allowedContexts.join(",");
-      return true;
-    },
-    getImplementation() {
-      // The actual implementation is not significant for this test.
-      // Let's take this opportunity to see if schema generation is free of
-      // exceptions even when somehow getImplementation does not return an
-      // implementation.
-    },
-  };
-
-  let root = {};
-  Schemas.inject(root, localWrapper);
-
-  function verify(path, expected) {
-    let obj = root;
-    for (let thing of path.split(".")) {
-      try {
-        obj = obj[thing];
-      } catch (e) {
-        // Blech.
-      }
-    }
-
-    let result = results[path];
-    equal(result, expected);
-  }
-
-  verify("noAllowedContexts", "");
-  verify("noAllowedContexts.prop1", "");
-  verify("noAllowedContexts.prop2", "test_zero,test_one");
-  verify("noAllowedContexts.prop3", "");
-  verify("noAllowedContexts.prop4", "numeric_one");
-
-  verify("defaultContexts", "");
-  verify("defaultContexts.prop1", "test_two");
-  verify("defaultContexts.prop2", "test_three");
-  verify("defaultContexts.prop3", "test_two");
-  verify("defaultContexts.prop4", "numeric_two");
-
-  verify("withAllowedContexts", "test_four");
-  verify("withAllowedContexts.prop1", "");
-  verify("withAllowedContexts.prop2", "test_five");
-  verify("withAllowedContexts.prop3", "");
-  verify("withAllowedContexts.prop4", "numeric_three");
-
-  verify("withAllowedContextsAndDefault", "test_six");
-  verify("withAllowedContextsAndDefault.prop1", "test_seven");
-  verify("withAllowedContextsAndDefault.prop2", "test_eight");
-  verify("withAllowedContextsAndDefault.prop3", "test_seven");
-  verify("withAllowedContextsAndDefault.prop4", "numeric_four");
-
-  verify("with_submodule", "");
-  verify("with_submodule.prop1", "test_nine");
-  verify("with_submodule.prop1.noAllowedContexts", "test_nine");
-  verify("with_submodule.prop1.allowedContexts", "test_ten");
-  verify("with_submodule.prop2", "test_eleven");
-  // Note: test_nine inherits allowed contexts from the namespace, not from
-  // submodule. There is no "defaultContexts" for submodule types to not
-  // complicate things.
-  verify("with_submodule.prop1.noAllowedContexts", "test_nine");
-  verify("with_submodule.prop1.allowedContexts", "test_ten");
-
-  // This is a constant, so it does not matter that getImplementation does not
-  // return an implementation since the API injector should take care of it.
-  equal(root.noAllowedContexts.prop3, 1);
-
-  Assert.throws(() => root.noAllowedContexts.prop1,
-                /undefined/,
-                "Should throw when the implementation is absent.");
-});
-
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_api_injection.js b/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_api_injection.js
deleted file mode 100644
index 36d88d722..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_api_injection.js
+++ /dev/null
@@ -1,102 +0,0 @@
-"use strict";
-
-Components.utils.import("resource://gre/modules/ExtensionCommon.jsm");
-Components.utils.import("resource://gre/modules/Schemas.jsm");
-
-let {
-  BaseContext,
-  SchemaAPIManager,
-} = ExtensionCommon;
-
-let nestedNamespaceJson = [
-  {
-    "namespace": "backgroundAPI.testnamespace",
-    "functions": [
-      {
-        "name": "create",
-        "type": "function",
-        "parameters": [
-          {
-            "name": "title",
-            "type": "string",
-          },
-        ],
-        "returns": {
-          "type": "string",
-        },
-      },
-    ],
-  },
-  {
-    "namespace": "noBackgroundAPI.testnamespace",
-    "functions": [
-      {
-        "name": "create",
-        "type": "function",
-        "parameters": [
-          {
-            "name": "title",
-            "type": "string",
-          },
-        ],
-      },
-    ],
-  },
-];
-
-let global = this;
-class StubContext extends BaseContext {
-  constructor() {
-    let fakeExtension = {id: "test@web.extension"};
-    super("addon_child", fakeExtension);
-    this.sandbox = Cu.Sandbox(global);
-    this.viewType = "background";
-  }
-
-  get cloneScope() {
-    return this.sandbox;
-  }
-}
-
-add_task(function* testSchemaAPIInjection() {
-  let url = "data:," + JSON.stringify(nestedNamespaceJson);
-
-  // Load the schema of the fake APIs.
-  yield Schemas.load(url);
-
-  let apiManager = new SchemaAPIManager("addon");
-
-  // Register an API that will skip the background page.
-  apiManager.registerSchemaAPI("noBackgroundAPI.testnamespace", "addon_child", context => {
-    // This API should not be available in this context, return null so that
-    // the schema wrapper is removed as well.
-    return null;
-  });
-
-  // Register an API that will skip any but the background page.
-  apiManager.registerSchemaAPI("backgroundAPI.testnamespace", "addon_child", context => {
-    if (context.viewType === "background") {
-      return {
-        backgroundAPI: {
-          testnamespace: {
-            create(title) {
-              return title;
-            },
-          },
-        },
-      };
-    }
-
-    // This API should not be available in this context, return null so that
-    // the schema wrapper is removed as well.
-    return null;
-  });
-
-  let context = new StubContext();
-  let browserObj = {};
-  apiManager.generateAPIs(context, browserObj);
-
-  do_check_eq(browserObj.noBackgroundAPI, undefined);
-  const res = browserObj.backgroundAPI.testnamespace.create("param-value");
-  do_check_eq(res, "param-value");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_async.js b/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_async.js
deleted file mode 100644
index 6397d1f96..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_schemas_async.js
+++ /dev/null
@@ -1,232 +0,0 @@
-"use strict";
-
-Components.utils.import("resource://gre/modules/ExtensionCommon.jsm");
-Components.utils.import("resource://gre/modules/Schemas.jsm");
-
-let {BaseContext, LocalAPIImplementation} = ExtensionCommon;
-
-let schemaJson = [
-  {
-    namespace: "testnamespace",
-    functions: [{
-      name: "one_required",
-      type: "function",
-      parameters: [{
-        name: "first",
-        type: "function",
-        parameters: [],
-      }],
-    }, {
-      name: "one_optional",
-      type: "function",
-      parameters: [{
-        name: "first",
-        type: "function",
-        parameters: [],
-        optional: true,
-      }],
-    }, {
-      name: "async_required",
-      type: "function",
-      async: "first",
-      parameters: [{
-        name: "first",
-        type: "function",
-        parameters: [],
-      }],
-    }, {
-      name: "async_optional",
-      type: "function",
-      async: "first",
-      parameters: [{
-        name: "first",
-        type: "function",
-        parameters: [],
-        optional: true,
-      }],
-    }],
-  },
-];
-
-const global = this;
-class StubContext extends BaseContext {
-  constructor() {
-    let fakeExtension = {id: "test@web.extension"};
-    super("testEnv", fakeExtension);
-    this.sandbox = Cu.Sandbox(global);
-  }
-
-  get cloneScope() {
-    return this.sandbox;
-  }
-
-  get principal() {
-    return Cu.getObjectPrincipal(this.sandbox);
-  }
-}
-
-let context;
-
-function generateAPIs(extraWrapper, apiObj) {
-  context = new StubContext();
-  let localWrapper = {
-    shouldInject() {
-      return true;
-    },
-    getImplementation(namespace, name) {
-      return new LocalAPIImplementation(apiObj, name, context);
-    },
-  };
-  Object.assign(localWrapper, extraWrapper);
-
-  let root = {};
-  Schemas.inject(root, localWrapper);
-  return root.testnamespace;
-}
-
-add_task(function* testParameterValidation() {
-  yield Schemas.load("data:," + JSON.stringify(schemaJson));
-
-  let testnamespace;
-  function assertThrows(name, ...args) {
-    Assert.throws(() => testnamespace[name](...args),
-        /Incorrect argument types/,
-        `Expected testnamespace.${name}(${args.map(String).join(", ")}) to throw.`);
-  }
-  function assertNoThrows(name, ...args) {
-    try {
-      testnamespace[name](...args);
-    } catch (e) {
-      do_print(`testnamespace.${name}(${args.map(String).join(", ")}) unexpectedly threw.`);
-      throw new Error(e);
-    }
-  }
-  let cb = () => {};
-
-  for (let isChromeCompat of [true, false]) {
-    do_print(`Testing API validation with isChromeCompat=${isChromeCompat}`);
-    testnamespace = generateAPIs({
-      isChromeCompat,
-    }, {
-      one_required() {},
-      one_optional() {},
-      async_required() {},
-      async_optional() {},
-    });
-
-    assertThrows("one_required");
-    assertThrows("one_required", null);
-    assertNoThrows("one_required", cb);
-    assertThrows("one_required", cb, null);
-    assertThrows("one_required", cb, cb);
-
-    assertNoThrows("one_optional");
-    assertNoThrows("one_optional", null);
-    assertNoThrows("one_optional", cb);
-    assertThrows("one_optional", cb, null);
-    assertThrows("one_optional", cb, cb);
-
-    // Schema-based validation happens before an async method is called, so
-    // errors should be thrown synchronously.
-
-    // The parameter was declared as required, but there was also an "async"
-    // attribute with the same value as the parameter name, so the callback
-    // parameter is actually optional.
-    assertNoThrows("async_required");
-    assertNoThrows("async_required", null);
-    assertNoThrows("async_required", cb);
-    assertThrows("async_required", cb, null);
-    assertThrows("async_required", cb, cb);
-
-    assertNoThrows("async_optional");
-    assertNoThrows("async_optional", null);
-    assertNoThrows("async_optional", cb);
-    assertThrows("async_optional", cb, null);
-    assertThrows("async_optional", cb, cb);
-  }
-});
-
-add_task(function* testAsyncResults() {
-  yield Schemas.load("data:," + JSON.stringify(schemaJson));
-  function* runWithCallback(func) {
-    do_print(`Calling testnamespace.${func.name}, expecting callback with result`);
-    return yield new Promise(resolve => {
-      let result = "uninitialized value";
-      let returnValue = func(reply => {
-        result = reply;
-        resolve(result);
-      });
-      // When a callback is given, the return value must be missing.
-      do_check_eq(returnValue, undefined);
-      // Callback must be called asynchronously.
-      do_check_eq(result, "uninitialized value");
-    });
-  }
-
-  function* runFailCallback(func) {
-    do_print(`Calling testnamespace.${func.name}, expecting callback with error`);
-    return yield new Promise(resolve => {
-      func(reply => {
-        do_check_eq(reply, undefined);
-        resolve(context.lastError.message); // eslint-disable-line no-undef
-      });
-    });
-  }
-
-  for (let isChromeCompat of [true, false]) {
-    do_print(`Testing API invocation with isChromeCompat=${isChromeCompat}`);
-    let testnamespace = generateAPIs({
-      isChromeCompat,
-    }, {
-      async_required(cb) {
-        do_check_eq(cb, undefined);
-        return Promise.resolve(1);
-      },
-      async_optional(cb) {
-        do_check_eq(cb, undefined);
-        return Promise.resolve(2);
-      },
-    });
-    if (!isChromeCompat) {  // No promises for chrome.
-      do_print("testnamespace.async_required should be a Promise");
-      let promise = testnamespace.async_required();
-      do_check_true(promise instanceof context.cloneScope.Promise);
-      do_check_eq(yield promise, 1);
-
-      do_print("testnamespace.async_optional should be a Promise");
-      promise = testnamespace.async_optional();
-      do_check_true(promise instanceof context.cloneScope.Promise);
-      do_check_eq(yield promise, 2);
-    }
-
-    do_check_eq(yield* runWithCallback(testnamespace.async_required), 1);
-    do_check_eq(yield* runWithCallback(testnamespace.async_optional), 2);
-
-    let otherSandbox = Cu.Sandbox(null, {});
-    let errorFactories = [
-      msg => { throw new context.cloneScope.Error(msg); },
-      msg => context.cloneScope.Promise.reject({message: msg}),
-      msg => Cu.evalInSandbox(`throw new Error("${msg}")`, otherSandbox),
-      msg => Cu.evalInSandbox(`Promise.reject({message: "${msg}"})`, otherSandbox),
-    ];
-    for (let makeError of errorFactories) {
-      do_print(`Testing callback/promise with error caused by: ${makeError}`);
-      testnamespace = generateAPIs({
-        isChromeCompat,
-      }, {
-        async_required() { return makeError("ONE"); },
-        async_optional() { return makeError("TWO"); },
-      });
-
-      if (!isChromeCompat) {  // No promises for chrome.
-        yield Assert.rejects(testnamespace.async_required(), /ONE/,
-            "should reject testnamespace.async_required()").catch(() => {});
-        yield Assert.rejects(testnamespace.async_optional(), /TWO/,
-            "should reject testnamespace.async_optional()").catch(() => {});
-      }
-
-      do_check_eq(yield* runFailCallback(testnamespace.async_required), "ONE");
-      do_check_eq(yield* runFailCallback(testnamespace.async_optional), "TWO");
-    }
-  }
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_simple.js b/toolkit/components/webextensions/test/xpcshell/test_ext_simple.js
deleted file mode 100644
index 91b10354c..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_simple.js
+++ /dev/null
@@ -1,69 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-add_task(function* test_simple() {
-  let extensionData = {
-    manifest: {
-      "name": "Simple extension test",
-      "version": "1.0",
-      "manifest_version": 2,
-      "description": "",
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.unload();
-});
-
-add_task(function* test_background() {
-  function background() {
-    browser.test.log("running background script");
-
-    browser.test.onMessage.addListener((x, y) => {
-      browser.test.assertEq(x, 10, "x is 10");
-      browser.test.assertEq(y, 20, "y is 20");
-
-      browser.test.notifyPass("background test passed");
-    });
-
-    browser.test.sendMessage("running", 1);
-  }
-
-  let extensionData = {
-    background,
-    manifest: {
-      "name": "Simple extension test",
-      "version": "1.0",
-      "manifest_version": 2,
-      "description": "",
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  let [, x] = yield Promise.all([extension.startup(), extension.awaitMessage("running")]);
-  equal(x, 1, "got correct value from extension");
-
-  extension.sendMessage(10, 20);
-  yield extension.awaitFinish();
-  yield extension.unload();
-});
-
-add_task(function* test_extensionTypes() {
-  let extensionData = {
-    background: function() {
-      browser.test.assertEq(typeof browser.extensionTypes, "object", "browser.extensionTypes exists");
-      browser.test.assertEq(typeof browser.extensionTypes.RunAt, "object", "browser.extensionTypes.RunAt exists");
-      browser.test.notifyPass("extentionTypes test passed");
-    },
-  };
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-
-  yield extension.startup();
-  yield extension.awaitFinish();
-  yield extension.unload();
-});
-
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_storage.js b/toolkit/components/webextensions/test/xpcshell/test_ext_storage.js
deleted file mode 100644
index df46dfb63..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_storage.js
+++ /dev/null
@@ -1,334 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-const STORAGE_SYNC_PREF = "webextensions.storage.sync.enabled";
-Cu.import("resource://gre/modules/Preferences.jsm");
-
-/**
- * Utility function to ensure that all supported APIs for getting are
- * tested.
- *
- * @param {string} areaName
- *        either "local" or "sync" according to what we want to test
- * @param {string} prop
- *        "key" to look up using the storage API
- * @param {Object} value
- *        "value" to compare against
- */
-async function checkGetImpl(areaName, prop, value) {
-  let storage = browser.storage[areaName];
-
-  let data = await storage.get(null);
-  browser.test.assertEq(value, data[prop], `null getter worked for ${prop} in ${areaName}`);
-
-  data = await storage.get(prop);
-  browser.test.assertEq(value, data[prop], `string getter worked for ${prop} in ${areaName}`);
-
-  data = await storage.get([prop]);
-  browser.test.assertEq(value, data[prop], `array getter worked for ${prop} in ${areaName}`);
-
-  data = await storage.get({[prop]: undefined});
-  browser.test.assertEq(value, data[prop], `object getter worked for ${prop} in ${areaName}`);
-}
-
-add_task(function* test_local_cache_invalidation() {
-  function background(checkGet) {
-    browser.test.onMessage.addListener(async msg => {
-      if (msg === "set-initial") {
-        await browser.storage.local.set({"test-prop1": "value1", "test-prop2": "value2"});
-        browser.test.sendMessage("set-initial-done");
-      } else if (msg === "check") {
-        await checkGet("local", "test-prop1", "value1");
-        await checkGet("local", "test-prop2", "value2");
-        browser.test.sendMessage("check-done");
-      }
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["storage"],
-    },
-    background: `(${background})(${checkGetImpl})`,
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage("set-initial");
-  yield extension.awaitMessage("set-initial-done");
-
-  Services.obs.notifyObservers(null, "extension-invalidate-storage-cache", "");
-
-  extension.sendMessage("check");
-  yield extension.awaitMessage("check-done");
-
-  yield extension.unload();
-});
-
-add_task(function* test_config_flag_needed() {
-  function background() {
-    let promises = [];
-    let apiTests = [
-      {method: "get", args: ["foo"]},
-      {method: "set", args: [{foo: "bar"}]},
-      {method: "remove", args: ["foo"]},
-      {method: "clear", args: []},
-    ];
-    apiTests.forEach(testDef => {
-      promises.push(browser.test.assertRejects(
-        browser.storage.sync[testDef.method](...testDef.args),
-        "Please set webextensions.storage.sync.enabled to true in about:config",
-        `storage.sync.${testDef.method} is behind a flag`));
-    });
-
-    Promise.all(promises).then(() => browser.test.notifyPass("flag needed"));
-  }
-
-  ok(!Preferences.get(STORAGE_SYNC_PREF));
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["storage"],
-    },
-    background: `(${background})(${checkGetImpl})`,
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("flag needed");
-  yield extension.unload();
-});
-
-add_task(function* test_reloading_extensions_works() {
-  // Just some random extension ID that we can re-use
-  const extensionId = "my-extension-id@1";
-
-  function loadExtension() {
-    function background() {
-      browser.storage.sync.set({"a": "b"}).then(() => {
-        browser.test.notifyPass("set-works");
-      });
-    }
-
-    return ExtensionTestUtils.loadExtension({
-      manifest: {
-        permissions: ["storage"],
-      },
-      background: `(${background})()`,
-    }, extensionId);
-  }
-
-  Preferences.set(STORAGE_SYNC_PREF, true);
-
-  let extension1 = loadExtension();
-
-  yield extension1.startup();
-  yield extension1.awaitFinish("set-works");
-  yield extension1.unload();
-
-  let extension2 = loadExtension();
-
-  yield extension2.startup();
-  yield extension2.awaitFinish("set-works");
-  yield extension2.unload();
-
-  Preferences.reset(STORAGE_SYNC_PREF);
-});
-
-do_register_cleanup(() => {
-  Preferences.reset(STORAGE_SYNC_PREF);
-});
-
-add_task(function* test_backgroundScript() {
-  async function backgroundScript(checkGet) {
-    let globalChanges, gResolve;
-    function clearGlobalChanges() {
-      globalChanges = new Promise(resolve => { gResolve = resolve; });
-    }
-    clearGlobalChanges();
-    let expectedAreaName;
-
-    browser.storage.onChanged.addListener((changes, areaName) => {
-      browser.test.assertEq(expectedAreaName, areaName,
-        "Expected area name received by listener");
-      gResolve(changes);
-    });
-
-    async function checkChanges(areaName, changes, message) {
-      function checkSub(obj1, obj2) {
-        for (let prop in obj1) {
-          browser.test.assertTrue(obj1[prop] !== undefined,
-                                  `checkChanges ${areaName} ${prop} is missing (${message})`);
-          browser.test.assertTrue(obj2[prop] !== undefined,
-                                  `checkChanges ${areaName} ${prop} is missing (${message})`);
-          browser.test.assertEq(obj1[prop].oldValue, obj2[prop].oldValue,
-                                `checkChanges ${areaName} ${prop} old (${message})`);
-          browser.test.assertEq(obj1[prop].newValue, obj2[prop].newValue,
-                                `checkChanges ${areaName} ${prop} new (${message})`);
-        }
-      }
-
-      const recentChanges = await globalChanges;
-      checkSub(changes, recentChanges);
-      checkSub(recentChanges, changes);
-      clearGlobalChanges();
-    }
-
-    /* eslint-disable dot-notation */
-    async function runTests(areaName) {
-      expectedAreaName = areaName;
-      let storage = browser.storage[areaName];
-      // Set some data and then test getters.
-      try {
-        await storage.set({"test-prop1": "value1", "test-prop2": "value2"});
-        await checkChanges(areaName,
-          {"test-prop1": {newValue: "value1"}, "test-prop2": {newValue: "value2"}},
-          "set (a)");
-
-        await checkGet(areaName, "test-prop1", "value1");
-        await checkGet(areaName, "test-prop2", "value2");
-
-        let data = await storage.get({"test-prop1": undefined, "test-prop2": undefined, "other": "default"});
-        browser.test.assertEq("value1", data["test-prop1"], "prop1 correct (a)");
-        browser.test.assertEq("value2", data["test-prop2"], "prop2 correct (a)");
-        browser.test.assertEq("default", data["other"], "other correct");
-
-        data = await storage.get(["test-prop1", "test-prop2", "other"]);
-        browser.test.assertEq("value1", data["test-prop1"], "prop1 correct (b)");
-        browser.test.assertEq("value2", data["test-prop2"], "prop2 correct (b)");
-        browser.test.assertFalse("other" in data, "other correct");
-
-        // Remove data in various ways.
-        await storage.remove("test-prop1");
-        await checkChanges(areaName, {"test-prop1": {oldValue: "value1"}}, "remove string");
-
-        data = await storage.get(["test-prop1", "test-prop2"]);
-        browser.test.assertFalse("test-prop1" in data, "prop1 absent (remove string)");
-        browser.test.assertTrue("test-prop2" in data, "prop2 present (remove string)");
-
-        await storage.set({"test-prop1": "value1"});
-        await checkChanges(areaName, {"test-prop1": {newValue: "value1"}}, "set (c)");
-
-        data = await storage.get(["test-prop1", "test-prop2"]);
-        browser.test.assertEq(data["test-prop1"], "value1", "prop1 correct (c)");
-        browser.test.assertEq(data["test-prop2"], "value2", "prop2 correct (c)");
-
-        await storage.remove(["test-prop1", "test-prop2"]);
-        await checkChanges(areaName,
-          {"test-prop1": {oldValue: "value1"}, "test-prop2": {oldValue: "value2"}},
-          "remove array");
-
-        data = await storage.get(["test-prop1", "test-prop2"]);
-        browser.test.assertFalse("test-prop1" in data, "prop1 absent (remove array)");
-        browser.test.assertFalse("test-prop2" in data, "prop2 absent (remove array)");
-
-        // test storage.clear
-        await storage.set({"test-prop1": "value1", "test-prop2": "value2"});
-        // Make sure that set() handler happened before we clear the
-        // promise again.
-        await globalChanges;
-
-        clearGlobalChanges();
-        await storage.clear();
-
-        await checkChanges(areaName,
-          {"test-prop1": {oldValue: "value1"}, "test-prop2": {oldValue: "value2"}},
-          "clear");
-        data = await storage.get(["test-prop1", "test-prop2"]);
-        browser.test.assertFalse("test-prop1" in data, "prop1 absent (clear)");
-        browser.test.assertFalse("test-prop2" in data, "prop2 absent (clear)");
-
-        // Make sure we can store complex JSON data.
-        // known previous values
-        await storage.set({"test-prop1": "value1", "test-prop2": "value2"});
-
-        // Make sure the set() handler landed.
-        await globalChanges;
-
-        clearGlobalChanges();
-        await storage.set({
-          "test-prop1": {
-            str: "hello",
-            bool: true,
-            null: null,
-            undef: undefined,
-            obj: {},
-            arr: [1, 2],
-            date: new Date(0),
-            regexp: /regexp/,
-            func: function func() {},
-            window,
-          },
-        });
-
-        await storage.set({"test-prop2": function func() {}});
-        const recentChanges = await globalChanges;
-
-        browser.test.assertEq("value1", recentChanges["test-prop1"].oldValue, "oldValue correct");
-        browser.test.assertEq("object", typeof(recentChanges["test-prop1"].newValue), "newValue is obj");
-        clearGlobalChanges();
-
-        data = await storage.get({"test-prop1": undefined, "test-prop2": undefined});
-        let obj = data["test-prop1"];
-
-        browser.test.assertEq("hello", obj.str, "string part correct");
-        browser.test.assertEq(true, obj.bool, "bool part correct");
-        browser.test.assertEq(null, obj.null, "null part correct");
-        browser.test.assertEq(undefined, obj.undef, "undefined part correct");
-        browser.test.assertEq(undefined, obj.func, "function part correct");
-        browser.test.assertEq(undefined, obj.window, "window part correct");
-        browser.test.assertEq("1970-01-01T00:00:00.000Z", obj.date, "date part correct");
-        browser.test.assertEq("/regexp/", obj.regexp, "regexp part correct");
-        browser.test.assertEq("object", typeof(obj.obj), "object part correct");
-        browser.test.assertTrue(Array.isArray(obj.arr), "array part present");
-        browser.test.assertEq(1, obj.arr[0], "arr[0] part correct");
-        browser.test.assertEq(2, obj.arr[1], "arr[1] part correct");
-        browser.test.assertEq(2, obj.arr.length, "arr.length part correct");
-
-        obj = data["test-prop2"];
-
-        browser.test.assertEq("[object Object]", {}.toString.call(obj), "function serialized as a plain object");
-        browser.test.assertEq(0, Object.keys(obj).length, "function serialized as an empty object");
-      } catch (e) {
-        browser.test.fail(`Error: ${e} :: ${e.stack}`);
-        browser.test.notifyFail("storage");
-      }
-    }
-
-    browser.test.onMessage.addListener(msg => {
-      let promise;
-      if (msg === "test-local") {
-        promise = runTests("local");
-      } else if (msg === "test-sync") {
-        promise = runTests("sync");
-      }
-      promise.then(() => browser.test.sendMessage("test-finished"));
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extensionData = {
-    background: `(${backgroundScript})(${checkGetImpl})`,
-    manifest: {
-      permissions: ["storage"],
-    },
-  };
-
-  Preferences.set(STORAGE_SYNC_PREF, true);
-
-  let extension = ExtensionTestUtils.loadExtension(extensionData);
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage("test-local");
-  yield extension.awaitMessage("test-finished");
-
-  extension.sendMessage("test-sync");
-  yield extension.awaitMessage("test-finished");
-
-  Preferences.reset(STORAGE_SYNC_PREF);
-  yield extension.unload();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_topSites.js b/toolkit/components/webextensions/test/xpcshell/test_ext_topSites.js
deleted file mode 100644
index eb3f552ed..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_topSites.js
+++ /dev/null
@@ -1,85 +0,0 @@
-"use strict";
-
-Cu.import("resource://gre/modules/NewTabUtils.jsm");
-
-
-function TestProvider(getLinksFn) {
-  this.getLinks = getLinksFn;
-  this._observers = new Set();
-}
-
-TestProvider.prototype = {
-  addObserver: function(observer) {
-    this._observers.add(observer);
-  },
-  notifyLinkChanged: function(link, index = -1, deleted = false) {
-    this._notifyObservers("onLinkChanged", link, index, deleted);
-  },
-  notifyManyLinksChanged: function() {
-    this._notifyObservers("onManyLinksChanged");
-  },
-  _notifyObservers: function(observerMethodName, ...args) {
-    args.unshift(this);
-    for (let obs of this._observers) {
-      if (obs[observerMethodName]) {
-        obs[observerMethodName].apply(NewTabUtils.links, args);
-      }
-    }
-  },
-};
-
-function makeLinks(links) {
-  // Important: To avoid test failures due to clock jitter on Windows XP, call
-  // Date.now() once here, not each time through the loop.
-  let frecency = 0;
-  let now = Date.now() * 1000;
-  let places = [];
-  links.map((link, i) => {
-    places.push({
-      url: link.url,
-      title: link.title,
-      lastVisitDate: now - i,
-      frecency: frecency++,
-    });
-  });
-  return places;
-}
-
-add_task(function* test_topSites() {
-  let expect = [{url: "http://example.com/", title: "site#-1"},
-                {url: "http://example0.com/", title: "site#0"},
-                {url: "http://example1.com/", title: "site#1"},
-                {url: "http://example2.com/", title: "site#2"},
-                {url: "http://example3.com/", title: "site#3"}];
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "permissions": [
-        "topSites",
-      ],
-    },
-    background() {
-      browser.topSites.get(result => {
-        browser.test.sendMessage("done", result);
-      });
-    },
-  });
-
-
-  let expectedLinks = makeLinks(expect);
-  let provider = new TestProvider(done => done(expectedLinks));
-
-  NewTabUtils.initWithoutProviders();
-  NewTabUtils.links.addProvider(provider);
-
-  yield NewTabUtils.links.populateCache();
-
-  yield extension.startup();
-
-  let result = yield extension.awaitMessage("done");
-  Assert.deepEqual(expect, result, "got topSites");
-
-  yield extension.unload();
-
-  NewTabUtils.links.removeProvider(provider);
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_getAPILevelForWindow.js b/toolkit/components/webextensions/test/xpcshell/test_getAPILevelForWindow.js
deleted file mode 100644
index 68741a6cc..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_getAPILevelForWindow.js
+++ /dev/null
@@ -1,55 +0,0 @@
-"use strict";
-
-Cu.import("resource://gre/modules/ExtensionManagement.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-
-function createWindowWithAddonId(addonId) {
-  let baseURI = Services.io.newURI("about:blank", null, null);
-  let originAttributes = {addonId};
-  let principal = Services.scriptSecurityManager
-                          .createCodebasePrincipal(baseURI, originAttributes);
-  let chromeNav = Services.appShell.createWindowlessBrowser(true);
-  let interfaceRequestor = chromeNav.QueryInterface(Ci.nsIInterfaceRequestor);
-  let docShell = interfaceRequestor.getInterface(Ci.nsIDocShell);
-  docShell.createAboutBlankContentViewer(principal);
-
-  return {chromeNav, window: docShell.contentViewer.DOMDocument.defaultView};
-}
-
-add_task(function* test_eventpages() {
-  const {getAPILevelForWindow, getAddonIdForWindow} = ExtensionManagement;
-  const {NO_PRIVILEGES, FULL_PRIVILEGES} = ExtensionManagement.API_LEVELS;
-  const FAKE_ADDON_ID = "fakeAddonId";
-  const OTHER_ADDON_ID = "otherFakeAddonId";
-  const EMPTY_ADDON_ID = "";
-
-  let fakeAddonId = createWindowWithAddonId(FAKE_ADDON_ID);
-  equal(getAddonIdForWindow(fakeAddonId.window), FAKE_ADDON_ID,
-        "the window has the expected addonId");
-
-  let apiLevel = getAPILevelForWindow(fakeAddonId.window, FAKE_ADDON_ID);
-  equal(apiLevel, FULL_PRIVILEGES,
-        "apiLevel for the window with the right addonId should be FULL_PRIVILEGES");
-
-  apiLevel = getAPILevelForWindow(fakeAddonId.window, OTHER_ADDON_ID);
-  equal(apiLevel, NO_PRIVILEGES,
-        "apiLevel for the window with a different addonId should be NO_PRIVILEGES");
-
-  fakeAddonId.chromeNav.close();
-
-  // NOTE: check that window with an empty addon Id (which are window that are
-  // not Extensions pages) always get no WebExtensions APIs.
-  let emptyAddonId = createWindowWithAddonId(EMPTY_ADDON_ID);
-  equal(getAddonIdForWindow(emptyAddonId.window), EMPTY_ADDON_ID,
-        "the window has the expected addonId");
-
-  apiLevel = getAPILevelForWindow(emptyAddonId.window, EMPTY_ADDON_ID);
-  equal(apiLevel, NO_PRIVILEGES,
-        "apiLevel for empty addonId should be NO_PRIVILEGES");
-
-  apiLevel = getAPILevelForWindow(emptyAddonId.window, OTHER_ADDON_ID);
-  equal(apiLevel, NO_PRIVILEGES,
-        "apiLevel for an 'empty addonId' window should be always NO_PRIVILEGES");
-
-  emptyAddonId.chromeNav.close();
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_locale_converter.js b/toolkit/components/webextensions/test/xpcshell/test_locale_converter.js
deleted file mode 100644
index c8b1ee92b..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_locale_converter.js
+++ /dev/null
@@ -1,133 +0,0 @@
-"use strict";
-
-const convService = Cc["@mozilla.org/streamConverters;1"]
-  .getService(Ci.nsIStreamConverterService);
-
-const UUID = "72b61ee3-aceb-476c-be1b-0822b036c9f1";
-const ADDON_ID = "test@web.extension";
-const URI = NetUtil.newURI(`moz-extension://${UUID}/file.css`);
-
-const FROM_TYPE = "application/vnd.mozilla.webext.unlocalized";
-const TO_TYPE = "text/css";
-
-
-function StringStream(string) {
-  let stream = Cc["@mozilla.org/io/string-input-stream;1"]
-    .createInstance(Ci.nsIStringInputStream);
-
-  stream.data = string;
-  return stream;
-}
-
-
-// Initialize the policy service with a stub localizer for our
-// add-on ID.
-add_task(function* init() {
-  const aps = Cc["@mozilla.org/addons/policy-service;1"]
-    .getService(Ci.nsIAddonPolicyService).wrappedJSObject;
-
-  let oldCallback = aps.setExtensionURIToAddonIdCallback(uri => {
-    if (uri.host == UUID) {
-      return ADDON_ID;
-    }
-  });
-
-  aps.setAddonLocalizeCallback(ADDON_ID, string => {
-    return string.replace(/__MSG_(.*?)__/g, "<localized-$1>");
-  });
-
-  do_register_cleanup(() => {
-    aps.setExtensionURIToAddonIdCallback(oldCallback);
-    aps.setAddonLocalizeCallback(ADDON_ID, null);
-  });
-});
-
-
-// Test that the synchronous converter works as expected with a
-// simple string.
-add_task(function* testSynchronousConvert() {
-  let stream = StringStream("Foo __MSG_xxx__ bar __MSG_yyy__ baz");
-
-  let resultStream = convService.convert(stream, FROM_TYPE, TO_TYPE, URI);
-
-  let result = NetUtil.readInputStreamToString(resultStream, resultStream.available());
-
-  equal(result, "Foo <localized-xxx> bar <localized-yyy> baz");
-});
-
-
-// Test that the asynchronous converter works as expected with input
-// split into multiple chunks, and a boundary in the middle of a
-// replacement token.
-add_task(function* testAsyncConvert() {
-  let listener;
-  let awaitResult = new Promise((resolve, reject) => {
-    listener = {
-      QueryInterface: XPCOMUtils.generateQI([Ci.nsIStreamListener]),
-
-      onDataAvailable(request, context, inputStream, offset, count) {
-        this.resultParts.push(NetUtil.readInputStreamToString(inputStream, count));
-      },
-
-      onStartRequest() {
-        ok(!("resultParts" in this));
-        this.resultParts = [];
-      },
-
-      onStopRequest(request, context, statusCode) {
-        if (!Components.isSuccessCode(statusCode)) {
-          reject(new Error(statusCode));
-        }
-
-        resolve(this.resultParts.join("\n"));
-      },
-    };
-  });
-
-  let parts = ["Foo __MSG_x", "xx__ bar __MSG_yyy__ baz"];
-
-  let converter = convService.asyncConvertData(FROM_TYPE, TO_TYPE, listener, URI);
-  converter.onStartRequest(null, null);
-
-  for (let part of parts) {
-    converter.onDataAvailable(null, null, StringStream(part), 0, part.length);
-  }
-
-  converter.onStopRequest(null, null, Cr.NS_OK);
-
-
-  let result = yield awaitResult;
-  equal(result, "Foo <localized-xxx> bar <localized-yyy> baz");
-});
-
-
-// Test that attempting to initialize a converter with the URI of a
-// nonexistent WebExtension fails.
-add_task(function* testInvalidUUID() {
-  let uri = NetUtil.newURI("moz-extension://eb4f3be8-41c9-4970-aa6d-b84d1ecc02b2/file.css");
-  let stream = StringStream("Foo __MSG_xxx__ bar __MSG_yyy__ baz");
-
-  // Assert.throws raise a TypeError exception when the expected param
-  // is an arrow function. (See Bug 1237961 for rationale)
-  let expectInvalidContextException = function(e) {
-    return e.result === Cr.NS_ERROR_INVALID_ARG && /Invalid context/.test(e);
-  };
-
-  Assert.throws(() => {
-    convService.convert(stream, FROM_TYPE, TO_TYPE, uri);
-  }, expectInvalidContextException);
-
-  Assert.throws(() => {
-    let listener = {QueryInterface: XPCOMUtils.generateQI([Ci.nsIStreamListener])};
-
-    convService.asyncConvertData(FROM_TYPE, TO_TYPE, listener, uri);
-  }, expectInvalidContextException);
-});
-
-
-// Test that an empty stream does not throw an NS_ERROR_ILLEGAL_VALUE.
-add_task(function* testEmptyStream() {
-  let stream = StringStream("");
-  let resultStream = convService.convert(stream, FROM_TYPE, TO_TYPE, URI);
-  equal(resultStream.data, "");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_locale_data.js b/toolkit/components/webextensions/test/xpcshell/test_locale_data.js
deleted file mode 100644
index c3cd44e57..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_locale_data.js
+++ /dev/null
@@ -1,130 +0,0 @@
-"use strict";
-
-Cu.import("resource://gre/modules/Extension.jsm");
-
-/* globals ExtensionData */
-
-const uuidGenerator = Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator);
-
-function* generateAddon(data) {
-  let id = uuidGenerator.generateUUID().number;
-
-  data = Object.assign({embedded: true}, data);
-  data.manifest = Object.assign({applications: {gecko: {id}}}, data.manifest);
-
-  let xpi = Extension.generateXPI(data);
-  do_register_cleanup(() => {
-    Services.obs.notifyObservers(xpi, "flush-cache-entry", null);
-    xpi.remove(false);
-  });
-
-  let fileURI = Services.io.newFileURI(xpi);
-  let jarURI = NetUtil.newURI(`jar:${fileURI.spec}!/webextension/`);
-
-  let extension = new ExtensionData(jarURI);
-  yield extension.readManifest();
-
-  return extension;
-}
-
-add_task(function* testMissingDefaultLocale() {
-  let extension = yield generateAddon({
-    "files": {
-      "_locales/en_US/messages.json": {},
-    },
-  });
-
-  equal(extension.errors.length, 0, "No errors reported");
-
-  yield extension.initAllLocales();
-
-  equal(extension.errors.length, 1, "One error reported");
-
-  do_print(`Got error: ${extension.errors[0]}`);
-
-  ok(extension.errors[0].includes('"default_locale" property is required'),
-     "Got missing default_locale error");
-});
-
-
-add_task(function* testInvalidDefaultLocale() {
-  let extension = yield generateAddon({
-    "manifest": {
-      "default_locale": "en",
-    },
-
-    "files": {
-      "_locales/en_US/messages.json": {},
-    },
-  });
-
-  equal(extension.errors.length, 1, "One error reported");
-
-  do_print(`Got error: ${extension.errors[0]}`);
-
-  ok(extension.errors[0].includes("Loading locale file _locales/en/messages.json"),
-     "Got invalid default_locale error");
-
-  yield extension.initAllLocales();
-
-  equal(extension.errors.length, 2, "Two errors reported");
-
-  do_print(`Got error: ${extension.errors[1]}`);
-
-  ok(extension.errors[1].includes('"default_locale" property must correspond'),
-     "Got invalid default_locale error");
-});
-
-
-add_task(function* testUnexpectedDefaultLocale() {
-  let extension = yield generateAddon({
-    "manifest": {
-      "default_locale": "en_US",
-    },
-  });
-
-  equal(extension.errors.length, 1, "One error reported");
-
-  do_print(`Got error: ${extension.errors[0]}`);
-
-  ok(extension.errors[0].includes("Loading locale file _locales/en-US/messages.json"),
-     "Got invalid default_locale error");
-
-  yield extension.initAllLocales();
-
-  equal(extension.errors.length, 2, "One error reported");
-
-  do_print(`Got error: ${extension.errors[1]}`);
-
-  ok(extension.errors[1].includes('"default_locale" property must correspond'),
-     "Got unexpected default_locale error");
-});
-
-
-add_task(function* testInvalidSyntax() {
-  let extension = yield generateAddon({
-    "manifest": {
-      "default_locale": "en_US",
-    },
-
-    "files": {
-      "_locales/en_US/messages.json": '{foo: {message: "bar", description: "baz"}}',
-    },
-  });
-
-  equal(extension.errors.length, 1, "No errors reported");
-
-  do_print(`Got error: ${extension.errors[0]}`);
-
-  ok(extension.errors[0].includes("Loading locale file _locales\/en_US\/messages\.json: SyntaxError"),
-     "Got syntax error");
-
-  yield extension.initAllLocales();
-
-  equal(extension.errors.length, 2, "One error reported");
-
-  do_print(`Got error: ${extension.errors[1]}`);
-
-  ok(extension.errors[1].includes("Loading locale file _locales\/en_US\/messages\.json: SyntaxError"),
-     "Got syntax error");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/test_native_messaging.js b/toolkit/components/webextensions/test/xpcshell/test_native_messaging.js
deleted file mode 100644
index 1fcb7799e..000000000
--- a/toolkit/components/webextensions/test/xpcshell/test_native_messaging.js
+++ /dev/null
@@ -1,302 +0,0 @@
-"use strict";
-
-/* global OS, HostManifestManager, NativeApp */
-Cu.import("resource://gre/modules/AppConstants.jsm");
-Cu.import("resource://gre/modules/AsyncShutdown.jsm");
-Cu.import("resource://gre/modules/ExtensionCommon.jsm");
-Cu.import("resource://gre/modules/FileUtils.jsm");
-Cu.import("resource://gre/modules/Schemas.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-const {Subprocess, SubprocessImpl} = Cu.import("resource://gre/modules/Subprocess.jsm");
-Cu.import("resource://gre/modules/NativeMessaging.jsm");
-Cu.import("resource://gre/modules/osfile.jsm");
-
-let registry = null;
-if (AppConstants.platform == "win") {
-  Cu.import("resource://testing-common/MockRegistry.jsm");
-  registry = new MockRegistry();
-  do_register_cleanup(() => {
-    registry.shutdown();
-  });
-}
-
-const REGPATH = "Software\\Mozilla\\NativeMessagingHosts";
-
-const BASE_SCHEMA = "chrome://extensions/content/schemas/manifest.json";
-
-let dir = FileUtils.getDir("TmpD", ["NativeMessaging"]);
-dir.createUnique(Ci.nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-
-let userDir = dir.clone();
-userDir.append("user");
-userDir.create(Ci.nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-
-let globalDir = dir.clone();
-globalDir.append("global");
-globalDir.create(Ci.nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY);
-
-let dirProvider = {
-  getFile(property) {
-    if (property == "XREUserNativeMessaging") {
-      return userDir.clone();
-    } else if (property == "XRESysNativeMessaging") {
-      return globalDir.clone();
-    }
-    return null;
-  },
-};
-
-Services.dirsvc.registerProvider(dirProvider);
-
-do_register_cleanup(() => {
-  Services.dirsvc.unregisterProvider(dirProvider);
-  dir.remove(true);
-});
-
-function writeManifest(path, manifest) {
-  if (typeof manifest != "string") {
-    manifest = JSON.stringify(manifest);
-  }
-  return OS.File.writeAtomic(path, manifest);
-}
-
-let PYTHON;
-add_task(function* setup() {
-  yield Schemas.load(BASE_SCHEMA);
-
-  PYTHON = yield Subprocess.pathSearch("python2.7");
-  if (PYTHON == null) {
-    PYTHON = yield Subprocess.pathSearch("python");
-  }
-  notEqual(PYTHON, null, "Found a suitable python interpreter");
-});
-
-let global = this;
-
-// Test of HostManifestManager.lookupApplication() begin here...
-let context = {
-  url: null,
-  jsonStringify(...args) { return JSON.stringify(...args); },
-  cloneScope: global,
-  logError() {},
-  preprocessors: {},
-  callOnClose: () => {},
-  forgetOnClose: () => {},
-};
-
-class MockContext extends ExtensionCommon.BaseContext {
-  constructor(extensionId) {
-    let fakeExtension = {id: extensionId};
-    super("testEnv", fakeExtension);
-    this.sandbox = Cu.Sandbox(global);
-  }
-
-  get cloneScope() {
-    return global;
-  }
-
-  get principal() {
-    return Cu.getObjectPrincipal(this.sandbox);
-  }
-}
-
-let templateManifest = {
-  name: "test",
-  description: "this is only a test",
-  path: "/bin/cat",
-  type: "stdio",
-  allowed_extensions: ["extension@tests.mozilla.org"],
-};
-
-add_task(function* test_nonexistent_manifest() {
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  equal(result, null, "lookupApplication returns null for non-existent application");
-});
-
-const USER_TEST_JSON = OS.Path.join(userDir.path, "test.json");
-
-add_task(function* test_good_manifest() {
-  yield writeManifest(USER_TEST_JSON, templateManifest);
-  if (registry) {
-    registry.setValue(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
-                      `${REGPATH}\\test`, "", USER_TEST_JSON);
-  }
-
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  notEqual(result, null, "lookupApplication finds a good manifest");
-  equal(result.path, USER_TEST_JSON, "lookupApplication returns the correct path");
-  deepEqual(result.manifest, templateManifest, "lookupApplication returns the manifest contents");
-});
-
-add_task(function* test_invalid_json() {
-  yield writeManifest(USER_TEST_JSON, "this is not valid json");
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  equal(result, null, "lookupApplication ignores bad json");
-});
-
-add_task(function* test_invalid_name() {
-  let manifest = Object.assign({}, templateManifest);
-  manifest.name = "../test";
-  yield writeManifest(USER_TEST_JSON, manifest);
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  equal(result, null, "lookupApplication ignores an invalid name");
-});
-
-add_task(function* test_name_mismatch() {
-  let manifest = Object.assign({}, templateManifest);
-  manifest.name = "not test";
-  yield writeManifest(USER_TEST_JSON, manifest);
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  let what = (AppConstants.platform == "win") ? "registry key" : "json filename";
-  equal(result, null, `lookupApplication ignores mistmatch between ${what} and name property`);
-});
-
-add_task(function* test_missing_props() {
-  const PROPS = [
-    "name",
-    "description",
-    "path",
-    "type",
-    "allowed_extensions",
-  ];
-  for (let prop of PROPS) {
-    let manifest = Object.assign({}, templateManifest);
-    delete manifest[prop];
-
-    yield writeManifest(USER_TEST_JSON, manifest);
-    let result = yield HostManifestManager.lookupApplication("test", context);
-    equal(result, null, `lookupApplication ignores missing ${prop}`);
-  }
-});
-
-add_task(function* test_invalid_type() {
-  let manifest = Object.assign({}, templateManifest);
-  manifest.type = "bogus";
-  yield writeManifest(USER_TEST_JSON, manifest);
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  equal(result, null, "lookupApplication ignores invalid type");
-});
-
-add_task(function* test_no_allowed_extensions() {
-  let manifest = Object.assign({}, templateManifest);
-  manifest.allowed_extensions = [];
-  yield writeManifest(USER_TEST_JSON, manifest);
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  equal(result, null, "lookupApplication ignores manifest with no allowed_extensions");
-});
-
-const GLOBAL_TEST_JSON = OS.Path.join(globalDir.path, "test.json");
-let globalManifest = Object.assign({}, templateManifest);
-globalManifest.description = "This manifest is from the systemwide directory";
-
-add_task(function* good_manifest_system_dir() {
-  yield OS.File.remove(USER_TEST_JSON);
-  yield writeManifest(GLOBAL_TEST_JSON, globalManifest);
-  if (registry) {
-    registry.setValue(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
-                      `${REGPATH}\\test`, "", null);
-    registry.setValue(Ci.nsIWindowsRegKey.ROOT_KEY_LOCAL_MACHINE,
-                      `${REGPATH}\\test`, "", GLOBAL_TEST_JSON);
-  }
-
-  let where = (AppConstants.platform == "win") ? "registry location" : "directory";
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  notEqual(result, null, `lookupApplication finds a manifest in the system-wide ${where}`);
-  equal(result.path, GLOBAL_TEST_JSON, `lookupApplication returns path in the system-wide ${where}`);
-  deepEqual(result.manifest, globalManifest, `lookupApplication returns manifest contents from the system-wide ${where}`);
-});
-
-add_task(function* test_user_dir_precedence() {
-  yield writeManifest(USER_TEST_JSON, templateManifest);
-  if (registry) {
-    registry.setValue(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
-                      `${REGPATH}\\test`, "", USER_TEST_JSON);
-  }
-  // global test.json and LOCAL_MACHINE registry key on windows are
-  // still present from the previous test
-
-  let result = yield HostManifestManager.lookupApplication("test", context);
-  notEqual(result, null, "lookupApplication finds a manifest when entries exist in both user-specific and system-wide locations");
-  equal(result.path, USER_TEST_JSON, "lookupApplication returns the user-specific path when user-specific and system-wide entries both exist");
-  deepEqual(result.manifest, templateManifest, "lookupApplication returns user-specific manifest contents with user-specific and system-wide entries both exist");
-});
-
-// Test shutdown handling in NativeApp
-add_task(function* test_native_app_shutdown() {
-  const SCRIPT = String.raw`
-import signal
-import struct
-import sys
-
-signal.signal(signal.SIGTERM, signal.SIG_IGN)
-
-while True:
-    rawlen = sys.stdin.read(4)
-    if len(rawlen) == 0:
-        signal.pause()
-    msglen = struct.unpack('@I', rawlen)[0]
-    msg = sys.stdin.read(msglen)
-
-    sys.stdout.write(struct.pack('@I', msglen))
-    sys.stdout.write(msg)
-  `;
-
-  let scriptPath = OS.Path.join(userDir.path, "wontdie.py");
-  let manifestPath = OS.Path.join(userDir.path, "wontdie.json");
-
-  const ID = "native@tests.mozilla.org";
-  let manifest = {
-    name: "wontdie",
-    description: "test async shutdown of native apps",
-    type: "stdio",
-    allowed_extensions: [ID],
-  };
-
-  if (AppConstants.platform == "win") {
-    yield OS.File.writeAtomic(scriptPath, SCRIPT);
-
-    let batPath = OS.Path.join(userDir.path, "wontdie.bat");
-    let batBody = `@ECHO OFF\n${PYTHON} -u "${scriptPath}" %*\n`;
-    yield OS.File.writeAtomic(batPath, batBody);
-    yield OS.File.setPermissions(batPath, {unixMode: 0o755});
-
-    manifest.path = batPath;
-    yield writeManifest(manifestPath, manifest);
-
-    registry.setValue(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
-                      `${REGPATH}\\wontdie`, "", manifestPath);
-  } else {
-    yield OS.File.writeAtomic(scriptPath, `#!${PYTHON} -u\n${SCRIPT}`);
-    yield OS.File.setPermissions(scriptPath, {unixMode: 0o755});
-    manifest.path = scriptPath;
-    yield writeManifest(manifestPath, manifest);
-  }
-
-  let mockContext = new MockContext(ID);
-  let app = new NativeApp(mockContext, "wontdie");
-
-  // send a message and wait for the reply to make sure the app is running
-  let MSG = "test";
-  let recvPromise = new Promise(resolve => {
-    let listener = (what, msg) => {
-      equal(msg, MSG, "Received test message");
-      app.off("message", listener);
-      resolve();
-    };
-    app.on("message", listener);
-  });
-
-  let buffer = NativeApp.encodeMessage(mockContext, MSG);
-  app.send(buffer);
-  yield recvPromise;
-
-  app._cleanup();
-
-  do_print("waiting for async shutdown");
-  Services.prefs.setBoolPref("toolkit.asyncshutdown.testing", true);
-  AsyncShutdown.profileBeforeChange._trigger();
-  Services.prefs.clearUserPref("toolkit.asyncshutdown.testing");
-
-  let procs = yield SubprocessImpl.Process.getWorker().call("getProcesses", []);
-  equal(procs.size, 0, "native process exited");
-});
diff --git a/toolkit/components/webextensions/test/xpcshell/xpcshell.ini b/toolkit/components/webextensions/test/xpcshell/xpcshell.ini
deleted file mode 100644
index d2c6fd5d0..000000000
--- a/toolkit/components/webextensions/test/xpcshell/xpcshell.ini
+++ /dev/null
@@ -1,69 +0,0 @@
-[DEFAULT]
-head = head.js
-tail =
-firefox-appdir = browser
-skip-if = appname == "thunderbird"
-support-files =
-  data/** head_sync.js
-tags = webextensions
-
-[test_csp_custom_policies.js]
-[test_csp_validator.js]
-[test_ext_alarms.js]
-[test_ext_alarms_does_not_fire.js]
-[test_ext_alarms_periodic.js]
-[test_ext_alarms_replaces.js]
-[test_ext_apimanager.js]
-[test_ext_api_permissions.js]
-[test_ext_background_generated_load_events.js]
-[test_ext_background_generated_reload.js]
-[test_ext_background_global_history.js]
-skip-if = os == "android" # Android does not use Places for history.
-[test_ext_background_private_browsing.js]
-[test_ext_background_runtime_connect_params.js]
-[test_ext_background_sub_windows.js]
-[test_ext_background_window_properties.js]
-skip-if = os == "android"
-[test_ext_contexts.js]
-[test_ext_downloads.js]
-[test_ext_downloads_download.js]
-skip-if = os == "android"
-[test_ext_downloads_misc.js]
-skip-if = os == "android"
-[test_ext_downloads_search.js]
-skip-if = os == "android"
-[test_ext_experiments.js]
-skip-if = release_or_beta
-[test_ext_extension.js]
-[test_ext_idle.js]
-[test_ext_json_parser.js]
-[test_ext_localStorage.js]
-[test_ext_management.js]
-[test_ext_management_uninstall_self.js]
-[test_ext_manifest_content_security_policy.js]
-[test_ext_manifest_incognito.js]
-[test_ext_manifest_minimum_chrome_version.js]
-[test_ext_onmessage_removelistener.js]
-[test_ext_runtime_connect_no_receiver.js]
-[test_ext_runtime_getBrowserInfo.js]
-[test_ext_runtime_getPlatformInfo.js]
-[test_ext_runtime_onInstalled_and_onStartup.js]
-[test_ext_runtime_sendMessage.js]
-[test_ext_runtime_sendMessage_errors.js]
-[test_ext_runtime_sendMessage_no_receiver.js]
-[test_ext_runtime_sendMessage_self.js]
-[test_ext_schemas.js]
-[test_ext_schemas_api_injection.js]
-[test_ext_schemas_async.js]
-[test_ext_schemas_allowed_contexts.js]
-[test_ext_simple.js]
-[test_ext_storage.js]
-[test_ext_topSites.js]
-skip-if = os == "android"
-[test_getAPILevelForWindow.js]
-[test_ext_legacy_extension_context.js]
-[test_ext_legacy_extension_embedding.js]
-[test_locale_converter.js]
-[test_locale_data.js]
-[test_native_messaging.js]
-skip-if = os == "android"
-- 
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