Merge branch 'master' into xulrunner

18 files changed, 404 insertions, 69 deletions

diff --git a/application/palemoon/base/content/content.js b/application/palemoon/base/content/content.js
index 19c8b0682..653dac3e3 100644
--- a/application/palemoon/base/content/content.js
+++ b/application/palemoon/base/content/content.js
@@ -60,6 +60,114 @@ addEventListener("blur", function(event) {
   LoginManagerContent.onUsernameInput(event);
 });
 
+// Provide gContextMenuContentData for 'sdk/context-menu'
+var handleContentContextMenu = function (event) {
+  let defaultPrevented = event.defaultPrevented;
+  if (!Services.prefs.getBoolPref("dom.event.contextmenu.enabled")) {
+    let plugin = null;
+    try {
+      plugin = event.target.QueryInterface(Ci.nsIObjectLoadingContent);
+    } catch (e) {}
+    if (plugin && plugin.displayedType == Ci.nsIObjectLoadingContent.TYPE_PLUGIN) {
+      // Don't open a context menu for plugins.
+      return;
+    }
+
+    defaultPrevented = false;
+  }
+
+  if (defaultPrevented)
+    return;
+
+  let addonInfo = {};
+  let subject = {
+    event: event,
+    addonInfo: addonInfo,
+  };
+  subject.wrappedJSObject = subject;
+  Services.obs.notifyObservers(subject, "content-contextmenu", null);
+
+  let doc = event.target.ownerDocument;
+  let docLocation = doc.mozDocumentURIIfNotForErrorPages;
+  docLocation = docLocation && docLocation.spec;
+  let charSet = doc.characterSet;
+  let baseURI = doc.baseURI;
+  let referrer = doc.referrer;
+  let referrerPolicy = doc.referrerPolicy;
+  let frameOuterWindowID = doc.defaultView.QueryInterface(Ci.nsIInterfaceRequestor)
+                                          .getInterface(Ci.nsIDOMWindowUtils)
+                                          .outerWindowID;
+  let loginFillInfo = LoginManagerContent.getFieldContext(event.target);
+
+  // The same-origin check will be done in nsContextMenu.openLinkInTab.
+  let parentAllowsMixedContent = !!docShell.mixedContentChannel;
+
+  // get referrer attribute from clicked link and parse it
+  // if per element referrer is enabled, the element referrer overrules
+  // the document wide referrer
+  if (Services.prefs.getBoolPref("network.http.enablePerElementReferrer")) {
+    let referrerAttrValue = Services.netUtils.parseAttributePolicyString(event.target.
+                            getAttribute("referrerpolicy"));
+    if (referrerAttrValue !== Ci.nsIHttpChannel.REFERRER_POLICY_UNSET) {
+      referrerPolicy = referrerAttrValue;
+    }
+  }
+
+  // Media related cache info parent needs for saving
+  let contentType = null;
+  let contentDisposition = null;
+  if (event.target.nodeType == Ci.nsIDOMNode.ELEMENT_NODE &&
+      event.target instanceof Ci.nsIImageLoadingContent &&
+      event.target.currentURI) {
+
+    try {
+      let imageCache =
+        Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+                                        .getImgCacheForDocument(doc);
+      let props =
+        imageCache.findEntryProperties(event.target.currentURI, doc);
+      try {
+        contentType = props.get("type", Ci.nsISupportsCString).data;
+      } catch (e) {}
+      try {
+        contentDisposition =
+          props.get("content-disposition", Ci.nsISupportsCString).data;
+      } catch (e) {}
+    } catch (e) {}
+  }
+
+  let selectionInfo = BrowserUtils.getSelectionDetails(content);
+
+  let loadContext = docShell.QueryInterface(Ci.nsILoadContext);
+  let userContextId = loadContext.originAttributes.userContextId;
+
+  let browser = docShell.chromeEventHandler;
+  let mainWin = browser.ownerGlobal;
+
+  mainWin.gContextMenuContentData = {
+    isRemote: false,
+    event: event,
+    popupNode: event.target,
+    browser: browser,
+    addonInfo: addonInfo,
+    documentURIObject: doc.documentURIObject,
+    docLocation: docLocation,
+    charSet: charSet,
+    referrer: referrer,
+    referrerPolicy: referrerPolicy,
+    contentType: contentType,
+    contentDisposition: contentDisposition,
+    selectionInfo: selectionInfo,
+    loginFillInfo,
+    parentAllowsMixedContent,
+    userContextId,
+  };
+}
+
+Cc["@mozilla.org/eventlistenerservice;1"]
+  .getService(Ci.nsIEventListenerService)
+  .addSystemEventListener(global, "contextmenu", handleContentContextMenu, false);
+
 // Lazily load the finder code
 addMessageListener("Finder:Initialize", function () {
   let {RemoteFinderListener} = Cu.import("resource://gre/modules/RemoteFinder.jsm", {});
diff --git a/application/palemoon/base/content/nsContextMenu.js b/application/palemoon/base/content/nsContextMenu.js
index 1fe592b52..3d5d40e4c 100644
--- a/application/palemoon/base/content/nsContextMenu.js
+++ b/application/palemoon/base/content/nsContextMenu.js
@@ -4,6 +4,8 @@
 
 Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
 
+var gContextMenuContentData = null;
+
 function nsContextMenu(aXulMenu, aIsShift) {
   this.shouldDisplay = true;
   this.initMenu(aXulMenu, aIsShift);
@@ -39,6 +41,7 @@ nsContextMenu.prototype = {
   },
 
   hiding: function CM_hiding() {
+    gContextMenuContentData = null;
     InlineSpellCheckerUI.clearSuggestionsFromMenu();
     InlineSpellCheckerUI.clearDictionaryListFromMenu();
     InlineSpellCheckerUI.uninit();
diff --git a/browser/components/webextensions/ext-commands.js b/browser/components/webextensions/ext-commands.js
index 416544e86..3f0bf8d1a 100644
--- a/browser/components/webextensions/ext-commands.js
+++ b/browser/components/webextensions/ext-commands.js
@@ -74,15 +74,14 @@ CommandList.prototype = {
     // For Windows, chrome.runtime expects 'win' while chrome.commands
     // expects 'windows'.  We can special case this for now.
     let os = PlatformInfo.os == "win" ? "windows" : PlatformInfo.os;
-    for (let name of Object.keys(manifest.commands)) {
-      let command = manifest.commands[name];
-      let shortcut = command.suggested_key[os] || command.suggested_key.default;
-      if (shortcut) {
-        commands.set(name, {
-          description: command.description,
-          shortcut: shortcut.replace(/\s+/g, ""),
-        });
-      }
+    for (let [name, command] of Object.entries(manifest.commands)) {
+      let suggested_key = command.suggested_key || {};
+      let shortcut = suggested_key[os] || suggested_key.default;
+      shortcut = shortcut ? shortcut.replace(/\s+/g, "") : null;
+      commands.set(name, {
+        description: command.description,
+        shortcut,
+      });
     }
     return commands;
   },
@@ -96,8 +95,10 @@ CommandList.prototype = {
     let keyset = doc.createElementNS(XUL_NS, "keyset");
     keyset.id = `ext-keyset-id-${this.id}`;
     this.commands.forEach((command, name) => {
-      let keyElement = this.buildKey(doc, name, command.shortcut);
-      keyset.appendChild(keyElement);
+      if (command.shortcut) {
+        let keyElement = this.buildKey(doc, name, command.shortcut);
+        keyset.appendChild(keyElement);
+      }
     });
     doc.documentElement.appendChild(keyset);
     this.keysetsMap.set(window, keyset);
diff --git a/build/autoconf/compiler-opts.m4 b/build/autoconf/compiler-opts.m4
index 57a974435..c47d792f4 100644
--- a/build/autoconf/compiler-opts.m4
+++ b/build/autoconf/compiler-opts.m4
@@ -181,18 +181,15 @@ if test "$GNU_CC"; then
 
     if test -z "$CLANG_CC"; then
         case "$CC_VERSION" in
-        4.*)
+        4.* | 5.*)
             ;;
         *)
             # Lifetime Dead Store Elimination level 2 (default in GCC6+) breaks Gecko.
-            # Ideally, we'd use -flifetime-dse=1, but that means we'd forcefully
-            # enable it on optimization levels where it would otherwise not be enabled.
-            # So we disable it entirely. But since that would mean inconsistency with
-            # GCC5, which has level 1 depending on optimization level, disable it on
-            # GCC5 as well, because better safe than sorry.
+            # Instead of completely disabling this optimization on newer GCC's,
+            # we'll force them to use level 1 optimization with -flifetime-dse=1.
             # Add it first so that a mozconfig can override by setting CFLAGS/CXXFLAGS.
-            CFLAGS="-fno-lifetime-dse $CFLAGS"
-            CXXFLAGS="-fno-lifetime-dse $CXXFLAGS"
+            CFLAGS="-flifetime-dse=1 $CFLAGS"
+            CXXFLAGS="-flifetime-dse=1 $CXXFLAGS"
             ;;
         esac
     fi
diff --git a/toolkit/components/webextensions/ExtensionChild.jsm b/toolkit/components/webextensions/ExtensionChild.jsm
index c953dd685..5dc4e2277 100644
--- a/toolkit/components/webextensions/ExtensionChild.jsm
+++ b/toolkit/components/webextensions/ExtensionChild.jsm
@@ -325,7 +325,7 @@ class Messenger {
     return this.sendMessage(messageManager, msg, recipient, responseCallback);
   }
 
-  onMessage(name) {
+  _onMessage(name, filter) {
     return new SingletonEventManager(this.context, name, callback => {
       let listener = {
         messageFilterPermissive: this.optionalFilter,
@@ -333,7 +333,8 @@ class Messenger {
 
         filterMessage: (sender, recipient) => {
           // Ignore the message if it was sent by this Messenger.
-          return sender.contextId !== this.context.contextId;
+          return (sender.contextId !== this.context.contextId &&
+                  filter(sender, recipient));
         },
 
         receiveMessage: ({target, data: message, sender, recipient}) => {
@@ -373,6 +374,14 @@ class Messenger {
     }).api();
   }
 
+  onMessage(name) {
+    return this._onMessage(name, sender => sender.id === this.sender.id);
+  }
+
+  onMessageExternal(name) {
+    return this._onMessage(name, sender => sender.id !== this.sender.id);
+  }
+
   _connect(messageManager, port, recipient) {
     let msg = {
       name: port.name,
@@ -407,7 +416,7 @@ class Messenger {
     return this._connect(messageManager, port, recipient);
   }
 
-  onConnect(name) {
+  _onConnect(name, filter) {
     return new SingletonEventManager(this.context, name, callback => {
       let listener = {
         messageFilterPermissive: this.optionalFilter,
@@ -415,7 +424,8 @@ class Messenger {
 
         filterMessage: (sender, recipient) => {
           // Ignore the port if it was created by this Messenger.
-          return sender.contextId !== this.context.contextId;
+          return (sender.contextId !== this.context.contextId &&
+                  filter(sender, recipient));
         },
 
         receiveMessage: ({target, data: message, sender}) => {
@@ -438,6 +448,14 @@ class Messenger {
       };
     }).api();
   }
+
+  onConnect(name) {
+    return this._onConnect(name, sender => sender.id === this.sender.id);
+  }
+
+  onConnectExternal(name) {
+    return this._onConnect(name, sender => sender.id !== this.sender.id);
+  }
 }
 
 var apiManager = new class extends SchemaAPIManager {
@@ -745,7 +763,7 @@ class ExtensionPageContextChild extends BaseContext {
 
     // This is the MessageSender property passed to extension.
     // It can be augmented by the "page-open" hook.
-    let sender = {id: extension.uuid};
+    let sender = {id: extension.id};
     if (viewType == "tab") {
       sender.tabId = tabId;
       this.tabId = tabId;
diff --git a/toolkit/components/webextensions/ExtensionCommon.jsm b/toolkit/components/webextensions/ExtensionCommon.jsm
index a339fb27e..9ec84b5c7 100644
--- a/toolkit/components/webextensions/ExtensionCommon.jsm
+++ b/toolkit/components/webextensions/ExtensionCommon.jsm
@@ -197,10 +197,9 @@ class BaseContext {
    * @returns {Promise}
    */
   sendMessage(target, messageName, data, options = {}) {
-    options.recipient = options.recipient || {};
+    options.recipient = Object.assign({extensionId: this.extension.id}, options.recipient);
     options.sender = options.sender || {};
 
-    options.recipient.extensionId = this.extension.id;
     options.sender.extensionId = this.extension.id;
     options.sender.contextId = this.contextId;
 
diff --git a/toolkit/components/webextensions/ExtensionContent.jsm b/toolkit/components/webextensions/ExtensionContent.jsm
index 9b9a02091..5bdcde6f5 100644
--- a/toolkit/components/webextensions/ExtensionContent.jsm
+++ b/toolkit/components/webextensions/ExtensionContent.jsm
@@ -456,7 +456,7 @@ class ContentScriptContextChild extends BaseContext {
 
 defineLazyGetter(ContentScriptContextChild.prototype, "messenger", function() {
   // The |sender| parameter is passed directly to the extension.
-  let sender = {id: this.extension.uuid, frameId: this.frameId, url: this.url};
+  let sender = {id: this.extension.id, frameId: this.frameId, url: this.url};
   let filter = {extensionId: this.extension.id};
   let optionalFilter = {frameId: this.frameId};
 
diff --git a/toolkit/components/webextensions/LegacyExtensionsUtils.jsm b/toolkit/components/webextensions/LegacyExtensionsUtils.jsm
index 7632548e3..e8d276fe9 100644
--- a/toolkit/components/webextensions/LegacyExtensionsUtils.jsm
+++ b/toolkit/components/webextensions/LegacyExtensionsUtils.jsm
@@ -64,7 +64,7 @@ var LegacyExtensionContext = class extends BaseContext {
       {value: cloneScope, enumerable: true, configurable: true, writable: true}
     );
 
-    let sender = {id: targetExtension.uuid};
+    let sender = {id: targetExtension.id};
     let filter = {extensionId: targetExtension.id};
     // Legacy addons live in the main process. Messages from other addons are
     // Messages from WebExtensions are sent to the main process and forwarded via
diff --git a/toolkit/components/webextensions/ext-c-runtime.js b/toolkit/components/webextensions/ext-c-runtime.js
index 8adca60ca..1dcac35da 100644
--- a/toolkit/components/webextensions/ext-c-runtime.js
+++ b/toolkit/components/webextensions/ext-c-runtime.js
@@ -9,6 +9,10 @@ function runtimeApiFactory(context) {
 
       onMessage: context.messenger.onMessage("runtime.onMessage"),
 
+      onConnectExternal: context.messenger.onConnectExternal("runtime.onConnectExternal"),
+
+      onMessageExternal: context.messenger.onMessageExternal("runtime.onMessageExternal"),
+
       connect: function(extensionId, connectInfo) {
         let name = connectInfo !== null && connectInfo.name || "";
         extensionId = extensionId || extension.id;
@@ -47,7 +51,6 @@ function runtimeApiFactory(context) {
         if (options != null && typeof options != "object") {
           return Promise.reject({message: "runtime.sendMessage's options argument is invalid"});
         }
-        // TODO(robwu): Validate option keys and values when we support it.
 
         extensionId = extensionId || extension.id;
         let recipient = {extensionId};
diff --git a/toolkit/components/webextensions/schemas/runtime.json b/toolkit/components/webextensions/schemas/runtime.json
index b3f12a768..575df7d27 100644
--- a/toolkit/components/webextensions/schemas/runtime.json
+++ b/toolkit/components/webextensions/schemas/runtime.json
@@ -535,7 +535,6 @@
       },
       {
         "name": "onConnectExternal",
-        "unsupported": true,
         "type": "function",
         "description": "Fired when a connection is made from another extension.",
         "parameters": [
@@ -560,7 +559,6 @@
       },
       {
         "name": "onMessageExternal",
-        "unsupported": true,
         "type": "function",
         "description": "Fired when a message is sent from another extension/app. Cannot be used in a content script.",
         "parameters": [
diff --git a/toolkit/components/webextensions/test/mochitest/mochitest.ini b/toolkit/components/webextensions/test/mochitest/mochitest.ini
index 45586237e..1f61060ad 100644
--- a/toolkit/components/webextensions/test/mochitest/mochitest.ini
+++ b/toolkit/components/webextensions/test/mochitest/mochitest.ini
@@ -59,6 +59,7 @@ 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]
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js b/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js
index 0f617c37e..25d04b36b 100644
--- a/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js
+++ b/toolkit/components/webextensions/test/mochitest/test_ext_all_apis.js
@@ -75,7 +75,9 @@ let expectedBackgroundApis = [
   "runtime.getBackgroundPage",
   "runtime.getBrowserInfo",
   "runtime.getPlatformInfo",
+  "runtime.onConnectExternal",
   "runtime.onInstalled",
+  "runtime.onMessageExternal",
   "runtime.onStartup",
   "runtime.onUpdateAvailable",
   "runtime.openOptionsPage",
diff --git a/toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html b/toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html
new file mode 100644
index 000000000..dfc1f9427
--- /dev/null
+++ b/toolkit/components/webextensions/test/mochitest/test_ext_external_messaging.html
@@ -0,0 +1,111 @@
+<!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_sendmessage_reply2.html b/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html
index 1ebc1b40f..5c350be2f 100644
--- a/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html
+++ b/toolkit/components/webextensions/test/mochitest/test_ext_sendmessage_reply2.html
@@ -13,48 +13,119 @@
 <script type="text/javascript">
 "use strict";
 
-function backgroundScript(token) {
+function backgroundScript(token, id, otherId) {
+  browser.tabs.create({url: "tab.html"});
+
   browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    browser.test.assertTrue(sender.tab.url.endsWith("file_sample.html"), "sender url correct");
+    browser.test.assertEq(id, sender.id, `${id}: Got expected sender ID`);
 
-    if (msg == "done") {
-      browser.test.notifyPass("sendmessage_reply");
-      return;
+    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`);
+    }),
 
-    let tabId = sender.tab.id;
-    browser.tabs.sendMessage(tabId, `${token}-tabMessage`);
+    browser.runtime.sendMessage(`content-${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.assertEq(msg, token, "token matches");
-    sendReply(`${token}-done`);
+    browser.test.sendMessage("content-script-done");
   });
 }
 
-function contentScript(token) {
+function tabScript(token, id, otherId) {
   let gotTabMessage = false;
-  let badTabMessage = false;
   browser.runtime.onMessage.addListener((msg, sender, sendReply) => {
-    if (msg == `${token}-tabMessage`) {
+    browser.test.assertEq(id, sender.id, `${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;
-    } else {
-      badTabMessage = true;
     }
   });
 
-  browser.runtime.sendMessage(token, function(resp) {
-    if (resp != `${token}-done` || !gotTabMessage || badTabMessage) {
-      return; // test failed
-    }
-    browser.runtime.sendMessage("done");
+  Promise.all([
+    browser.runtime.sendMessage(otherId, `tab-${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() {
+function makeExtension(id, otherId) {
   let token = Math.random();
+
+  let args = `${token}, ${JSON.stringify(id)}, ${JSON.stringify(otherId)}`;
+
   let extensionData = {
-    background: `(${backgroundScript})(${token})`,
+    background: `(${backgroundScript})(${args})`,
     manifest: {
+      "applications": {"gecko": {id}},
+
       "permissions": ["tabs"],
+
+
       "content_scripts": [{
         "matches": ["http://mochi.test/*/file_sample.html"],
         "js": ["content_script.js"],
@@ -63,29 +134,46 @@ function makeExtension() {
     },
 
     files: {
-      "content_script.js": `(${contentScript})(${token})`,
+      "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() {
-  let extension1 = ExtensionTestUtils.loadExtension(makeExtension());
-  let extension2 = ExtensionTestUtils.loadExtension(makeExtension());
+  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 Promise.all([waitForLoad(win),
-                     extension1.awaitFinish("sendmessage_reply"),
-                     extension2.awaitFinish("sendmessage_reply")]);
+  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();
-  info("extensions unloaded");
 });
 </script>
 
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
index 63d5361a1..770851472 100644
--- a/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_context.js
+++ b/toolkit/components/webextensions/test/xpcshell/test_ext_legacy_extension_context.js
@@ -108,7 +108,7 @@ add_task(function* test_legacy_extension_context() {
      "Got the expected message");
   ok(msgSender, "Got a message sender object");
 
-  equal(msgSender.id, extensionInfo.uuid, "The sender has the expected id property");
+  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.
@@ -136,7 +136,7 @@ add_task(function* test_legacy_extension_context() {
 
   ok(port, "Got the Port API object");
   ok(port.sender, "The port has a sender property");
-  equal(port.sender.id, extensionInfo.uuid,
+  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");
diff --git a/toolkit/jetpack/moz.build b/toolkit/jetpack/moz.build
index ad11e90a3..2e5dbe5e8 100644
--- a/toolkit/jetpack/moz.build
+++ b/toolkit/jetpack/moz.build
@@ -128,9 +128,10 @@ EXTRA_JS_MODULES.commonjs += [
     'test.js',
 ]
 
-EXTRA_JS_MODULES.commonjs.sdk += [
-    'sdk/webextension.js',
-]
+if CONFIG['MOZ_WEBEXTENSIONS']:
+    EXTRA_JS_MODULES.commonjs.sdk += [
+        'sdk/webextension.js',
+    ]
 
 EXTRA_JS_MODULES.commonjs.dev += [
     'dev/debuggee.js',
@@ -228,7 +229,6 @@ EXTRA_PP_JS_MODULES.commonjs.sdk += [
 ]
 
 EXTRA_JS_MODULES.commonjs.sdk.addon += [
-    'sdk/addon/bootstrap.js',
     'sdk/addon/events.js',
     'sdk/addon/host.js',
     'sdk/addon/installer.js',
@@ -237,6 +237,10 @@ EXTRA_JS_MODULES.commonjs.sdk.addon += [
     'sdk/addon/window.js',
 ]
 
+EXTRA_PP_JS_MODULES.commonjs.sdk.addon += [
+    'sdk/addon/bootstrap.js',
+]
+
 EXTRA_JS_MODULES.commonjs.sdk.browser += [
     'sdk/browser/events.js',
 ]
diff --git a/toolkit/jetpack/sdk/addon/bootstrap.js b/toolkit/jetpack/sdk/addon/bootstrap.js
index 0397d91e5..6c5827f1e 100644
--- a/toolkit/jetpack/sdk/addon/bootstrap.js
+++ b/toolkit/jetpack/sdk/addon/bootstrap.js
@@ -134,8 +134,10 @@ Bootstrap.prototype = {
       const main = command === "test" ? "sdk/test/runner" : null;
       const prefsURI = `${baseURI}defaults/preferences/prefs.js`;
 
+#ifdef MOZ_WEBEXTENSIONS
       // Init the 'sdk/webextension' module from the bootstrap addon parameter.
       require("sdk/webextension").initFromBootstrapAddonParam(addon);
+#endif
 
       const { startup } = require("sdk/addon/runner");
       startup(reason, {loader, main, prefsURI});
diff --git a/widget/GfxInfoX11.cpp b/widget/GfxInfoX11.cpp
index 4297aaa93..48fc3dbb5 100644
--- a/widget/GfxInfoX11.cpp
+++ b/widget/GfxInfoX11.cpp
@@ -23,7 +23,7 @@ NS_IMPL_ISUPPORTS_INHERITED(GfxInfo, GfxInfoBase, nsIGfxInfoDebug)
 #endif
 
 // these global variables will be set when firing the glxtest process
-int glxtest_pipe = 0;
+int glxtest_pipe = -1;
 pid_t glxtest_pid = 0;
 
 nsresult
@@ -50,8 +50,8 @@ GfxInfo::GetData()
     // to understand this function, see bug 639842. We retrieve the OpenGL driver information in a
     // separate process to protect against bad drivers.
 
-    // if glxtest_pipe == 0, that means that we already read the information
-    if (!glxtest_pipe)
+    // if glxtest_pipe == -1, that means that we already read the information
+    if (glxtest_pipe == -1)
         return;
 
     enum { buf_size = 1024 };
@@ -60,7 +60,7 @@ GfxInfo::GetData()
                              &buf,
                              buf_size-1); // -1 because we'll append a zero
     close(glxtest_pipe);
-    glxtest_pipe = 0;
+    glxtest_pipe = -1;
 
     // bytesread < 0 would mean that the above read() call failed.
     // This should never happen. If it did, the outcome would be to blacklist anyway.