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diff --git a/b2g/app/b2g.js b/b2g/app/b2g.js
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+/* 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/. */
+
+#filter substitution
+
+// For the all MOZ_MULET ifdef conditions in this file: see bug 1174234
+
+#ifndef MOZ_MULET
+pref("toolkit.defaultChromeURI", "chrome://b2g/content/shell.html");
+pref("browser.chromeURL", "chrome://b2g/content/");
+#endif
+
+#ifdef MOZ_MULET
+// Set FxOS as the default homepage
+// bug 1000122: this pref is fetched as a complex value,
+// so that it can't be set a just a string.
+// data: url is a workaround this.
+pref("browser.startup.homepage", "data:text/plain,browser.startup.homepage=chrome://b2g/content/shell.html");
+pref("b2g.is_mulet", true);
+// Prevent having the firstrun page
+pref("startup.homepage_welcome_url", "");
+pref("browser.shell.checkDefaultBrowser", false);
+// Automatically open devtools on the firefox os panel
+pref("devtools.toolbox.host", "side");
+pref("devtools.toolbox.sidebar.width", 800);
+// Disable session store to ensure having only one tab opened
+pref("browser.sessionstore.max_tabs_undo", 0);
+pref("browser.sessionstore.max_windows_undo", 0);
+pref("browser.sessionstore.restore_on_demand", false);
+pref("browser.sessionstore.resume_from_crash", false);
+// No e10s on mulet
+pref("browser.tabs.remote.autostart.1", false);
+pref("browser.tabs.remote.autostart.2", false);
+#endif
+
+// Bug 945235: Prevent all bars to be considered visible:
+pref("toolkit.defaultChromeFeatures", "chrome,dialog=no,close,resizable,scrollbars,extrachrome");
+
+// Disable focus rings
+pref("browser.display.focus_ring_width", 0);
+
+// Device pixel to CSS px ratio, in percent. Set to -1 to calculate based on display density.
+pref("browser.viewport.scaleRatio", -1);
+
+/* disable text selection */
+pref("browser.ignoreNativeFrameTextSelection", true);
+
+/* cache prefs */
+#ifdef MOZ_WIDGET_GONK
+pref("browser.cache.disk.enable", true);
+pref("browser.cache.disk.capacity", 55000); // kilobytes
+pref("browser.cache.disk.parent_directory", "/cache");
+#endif
+pref("browser.cache.disk.smart_size.enabled", false);
+pref("browser.cache.disk.smart_size.first_run", false);
+
+pref("browser.cache.memory.enable", true);
+pref("browser.cache.memory.capacity", 1024); // kilobytes
+
+pref("browser.cache.memory_limit", 2048); // 2 MB
+
+/* image cache prefs */
+pref("image.cache.size", 1048576); // bytes
+pref("canvas.image.cache.limit", 20971520); // 20 MB
+
+/* offline cache prefs */
+pref("browser.offline-apps.notify", false);
+pref("browser.cache.offline.enable", true);
+pref("offline-apps.allow_by_default", true);
+
+/* protocol warning prefs */
+pref("network.protocol-handler.warn-external.tel", false);
+pref("network.protocol-handler.warn-external.mailto", false);
+pref("network.protocol-handler.warn-external.vnd.youtube", false);
+
+/* http prefs */
+pref("network.http.pipelining", true);
+pref("network.http.pipelining.ssl", true);
+pref("network.http.proxy.pipelining", true);
+pref("network.http.pipelining.maxrequests" , 6);
+pref("network.http.keep-alive.timeout", 109);
+pref("network.http.max-connections", 20);
+pref("network.http.max-persistent-connections-per-server", 6);
+pref("network.http.max-persistent-connections-per-proxy", 20);
+
+// Keep the old default of accepting all cookies,
+// no matter if you already visited the website or not
+pref("network.cookie.cookieBehavior", 0);
+
+// spdy
+pref("network.http.spdy.push-allowance", 32768);
+pref("network.http.spdy.default-hpack-buffer", 4096); // 4k
+
+// See bug 545869 for details on why these are set the way they are
+pref("network.buffer.cache.count", 24);
+pref("network.buffer.cache.size", 16384);
+
+// predictive actions
+pref("network.predictor.enabled", false); // disabled on b2g
+pref("network.predictor.max-db-size", 2097152); // bytes
+pref("network.predictor.preserve", 50); // percentage of predictor data to keep when cleaning up
+
+/* session history */
+pref("browser.sessionhistory.max_entries", 50);
+pref("browser.sessionhistory.contentViewerTimeout", 360);
+
+/* session store */
+pref("browser.sessionstore.resume_session_once", false);
+pref("browser.sessionstore.resume_from_crash", true);
+pref("browser.sessionstore.resume_from_crash_timeout", 60); // minutes
+pref("browser.sessionstore.interval", 10000); // milliseconds
+pref("browser.sessionstore.max_tabs_undo", 1);
+
+/* these should help performance */
+pref("mozilla.widget.force-24bpp", true);
+pref("mozilla.widget.use-buffer-pixmap", true);
+pref("mozilla.widget.disable-native-theme", true);
+pref("layout.reflow.synthMouseMove", false);
+#ifndef MOZ_X11
+pref("layers.enable-tiles", true);
+#endif
+pref("layers.low-precision-buffer", true);
+pref("layers.low-precision-opacity", "0.5");
+pref("layers.progressive-paint", true);
+
+/* download manager (don't show the window or alert) */
+pref("browser.download.useDownloadDir", true);
+pref("browser.download.folderList", 1); // Default to ~/Downloads
+pref("browser.download.manager.showAlertOnComplete", false);
+pref("browser.download.manager.showAlertInterval", 2000);
+pref("browser.download.manager.retention", 2);
+pref("browser.download.manager.showWhenStarting", false);
+pref("browser.download.manager.closeWhenDone", true);
+pref("browser.download.manager.openDelay", 0);
+pref("browser.download.manager.focusWhenStarting", false);
+pref("browser.download.manager.flashCount", 2);
+pref("browser.download.manager.displayedHistoryDays", 7);
+
+/* download helper */
+pref("browser.helperApps.deleteTempFileOnExit", false);
+
+/* password manager */
+pref("signon.rememberSignons", true);
+pref("signon.expireMasterPassword", false);
+
+/* autocomplete */
+pref("browser.formfill.enable", true);
+
+/* spellcheck */
+pref("layout.spellcheckDefault", 0);
+
+/* block popups by default, and notify the user about blocked popups */
+pref("dom.disable_open_during_load", true);
+pref("privacy.popups.showBrowserMessage", true);
+
+pref("keyword.enabled", true);
+pref("browser.fixup.domainwhitelist.localhost", true);
+
+pref("accessibility.typeaheadfind", false);
+pref("accessibility.typeaheadfind.timeout", 5000);
+pref("accessibility.typeaheadfind.flashBar", 1);
+pref("accessibility.typeaheadfind.linksonly", false);
+pref("accessibility.typeaheadfind.casesensitive", 0);
+
+// SSL error page behaviour
+pref("browser.ssl_override_behavior", 2);
+pref("browser.xul.error_pages.expert_bad_cert", false);
+
+// disable updating
+pref("browser.search.update", false);
+
+// tell the search service that we don't really expose the "current engine"
+pref("browser.search.noCurrentEngine", true);
+
+// enable xul error pages
+pref("browser.xul.error_pages.enabled", true);
+
+// disable color management
+pref("gfx.color_management.mode", 0);
+
+// don't allow JS to move and resize existing windows
+pref("dom.disable_window_move_resize", true);
+
+// prevent click image resizing for nsImageDocument
+pref("browser.enable_click_image_resizing", false);
+
+// controls which bits of private data to clear. by default we clear them all.
+pref("privacy.item.cache", true);
+pref("privacy.item.cookies", true);
+pref("privacy.item.offlineApps", true);
+pref("privacy.item.history", true);
+pref("privacy.item.formdata", true);
+pref("privacy.item.downloads", true);
+pref("privacy.item.passwords", true);
+pref("privacy.item.sessions", true);
+pref("privacy.item.geolocation", true);
+pref("privacy.item.siteSettings", true);
+pref("privacy.item.syncAccount", true);
+
+// base url for the wifi geolocation network provider
+pref("geo.provider.use_mls", false);
+pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
+
+// base url for the stumbler
+pref("geo.stumbler.url", "https://location.services.mozilla.com/v1/geosubmit?key=%MOZILLA_API_KEY%");
+
+// enable geo
+pref("geo.enabled", true);
+
+// content sink control -- controls responsiveness during page load
+// see https://bugzilla.mozilla.org/show_bug.cgi?id=481566#c9
+pref("content.sink.enable_perf_mode", 2); // 0 - switch, 1 - interactive, 2 - perf
+pref("content.sink.pending_event_mode", 0);
+pref("content.sink.perf_deflect_count", 1000000);
+pref("content.sink.perf_parse_time", 50000000);
+
+// Maximum scripts runtime before showing an alert
+// Disable the watchdog thread for B2G. See bug 870043 comment 31.
+pref("dom.use_watchdog", false);
+
+// The slow script dialog can be triggered from inside the JS engine as well,
+// ensure that those calls don't accidentally trigger the dialog.
+pref("dom.max_script_run_time", 0);
+pref("dom.max_chrome_script_run_time", 0);
+
+// plugins
+pref("plugin.disable", true);
+pref("dom.ipc.plugins.enabled", true);
+
+// product URLs
+// The breakpad report server to link to in about:crashes
+pref("breakpad.reportURL", "https://crash-stats.mozilla.com/report/index/");
+pref("app.releaseNotesURL", "https://www.mozilla.com/%LOCALE%/b2g/%VERSION%/releasenotes/");
+pref("app.support.baseURL", "https://support.mozilla.com/b2g");
+pref("app.privacyURL", "https://www.mozilla.com/%LOCALE%/m/privacy.html");
+pref("app.creditsURL", "https://www.mozilla.org/credits/");
+pref("app.featuresURL", "https://www.mozilla.com/%LOCALE%/b2g/features/");
+pref("app.faqURL", "https://www.mozilla.com/%LOCALE%/b2g/faq/");
+
+// Name of alternate about: page for certificate errors (when undefined, defaults to about:neterror)
+pref("security.alternate_certificate_error_page", "certerror");
+
+pref("security.warn_viewing_mixed", false); // Warning is disabled. See Bug 616712.
+
+// Block insecure active content on https pages
+pref("security.mixed_content.block_active_content", true);
+
+// 2 = strict certificate pinning checks.
+// This default preference is more strict than Firefox because B2G
+// currently does not have a way to install local root certificates.
+// Strict checking is effectively equivalent to non-strict checking as
+// long as that is true. If an ability to add local certificates is
+// added, there may be a need to change this pref.
+pref("security.cert_pinning.enforcement_level", 2);
+
+
+// Override some named colors to avoid inverse OS themes
+pref("ui.-moz-dialog", "#efebe7");
+pref("ui.-moz-dialogtext", "#101010");
+pref("ui.-moz-field", "#fff");
+pref("ui.-moz-fieldtext", "#1a1a1a");
+pref("ui.-moz-buttonhoverface", "#f3f0ed");
+pref("ui.-moz-buttonhovertext", "#101010");
+pref("ui.-moz-combobox", "#fff");
+pref("ui.-moz-comboboxtext", "#101010");
+pref("ui.buttonface", "#ece7e2");
+pref("ui.buttonhighlight", "#fff");
+pref("ui.buttonshadow", "#aea194");
+pref("ui.buttontext", "#101010");
+pref("ui.captiontext", "#101010");
+pref("ui.graytext", "#b1a598");
+pref("ui.highlighttext", "#1a1a1a");
+pref("ui.threeddarkshadow", "#000");
+pref("ui.threedface", "#ece7e2");
+pref("ui.threedhighlight", "#fff");
+pref("ui.threedlightshadow", "#ece7e2");
+pref("ui.threedshadow", "#aea194");
+pref("ui.windowframe", "#efebe7");
+
+// Themable via mozSettings
+pref("ui.menu", "#f97c17");
+pref("ui.menutext", "#ffffff");
+pref("ui.infobackground", "#343e40");
+pref("ui.infotext", "#686868");
+pref("ui.window", "#ffffff");
+pref("ui.windowtext", "#000000");
+pref("ui.highlight", "#b2f2ff");
+
+// replace newlines with spaces on paste into single-line text boxes
+pref("editor.singleLine.pasteNewlines", 2);
+
+// threshold where a tap becomes a drag, in 1/240" reference pixels
+// The names of the preferences are to be in sync with EventStateManager.cpp
+pref("ui.dragThresholdX", 25);
+pref("ui.dragThresholdY", 25);
+
+// Layers Acceleration. We can only have nice things on gonk, because
+// they're not maintained anywhere else.
+#ifndef MOZ_WIDGET_GONK
+pref("dom.ipc.tabs.disabled", true);
+pref("layers.async-pan-zoom.enabled", false);
+#else
+pref("dom.ipc.tabs.disabled", false);
+pref("layers.acceleration.disabled", false);
+pref("gfx.content.azure.backends", "cairo");
+#endif
+
+// Web Notifications
+pref("notification.feature.enabled", true);
+
+// prevent video elements from preloading too much data
+pref("media.preload.default", 1); // default to preload none
+pref("media.preload.auto", 2); // preload metadata if preload=auto
+pref("media.cache_size", 4096); // 4MB media cache
+// Try to save battery by not resuming reading from a connection until we fall
+// below 10s of buffered data.
+pref("media.cache_resume_threshold", 10);
+pref("media.cache_readahead_limit", 30);
+
+#ifdef MOZ_FMP4
+// Enable/Disable Gonk Decoder Module
+pref("media.gonk.enabled", true);
+#endif
+
+//Encrypted media extensions.
+pref("media.eme.enabled", true);
+pref("media.eme.apiVisible", true);
+// The default number of decoded video frames that are enqueued in
+// MediaDecoderReader's mVideoQueue.
+pref("media.video-queue.default-size", 3);
+
+// optimize images' memory usage
+pref("image.downscale-during-decode.enabled", true);
+pref("image.mem.allow_locking_in_content_processes", true);
+// Limit the surface cache to 1/8 of main memory or 128MB, whichever is smaller.
+// Almost everything that was factored into 'max_decoded_image_kb' is now stored
+// in the surface cache. 1/8 of main memory is 32MB on a 256MB device, which is
+// about the same as the old 'max_decoded_image_kb'.
+pref("image.mem.surfacecache.max_size_kb", 131072); // 128MB
+pref("image.mem.surfacecache.size_factor", 8); // 1/8 of main memory
+pref("image.mem.surfacecache.discard_factor", 2); // Discard 1/2 of the surface cache at a time.
+pref("image.mem.surfacecache.min_expiration_ms", 86400000); // 24h, we rely on the out of memory hook
+
+pref("dom.w3c_touch_events.safetyX", 0); // escape borders in units of 1/240"
+pref("dom.w3c_touch_events.safetyY", 120); // escape borders in units of 1/240"
+
+// True if this is the first time we are showing about:firstrun
+pref("browser.firstrun.show.uidiscovery", true);
+pref("browser.firstrun.show.localepicker", true);
+
+// initiated by a user
+pref("content.ime.strict_policy", true);
+
+// True if you always want dump() to work
+//
+// On Android, you also need to do the following for the output
+// to show up in logcat:
+//
+// $ adb shell stop
+// $ adb shell setprop log.redirect-stdio true
+// $ adb shell start
+pref("browser.dom.window.dump.enabled", false);
+
+// Default Content Security Policy to apply to certified apps.
+// If you change this CSP, make sure to update the fast path in nsCSPService.cpp
+pref("security.apps.certified.CSP.default", "default-src * data: blob:; script-src 'self'; object-src 'none'; style-src 'self' 'unsafe-inline' app://theme.gaiamobile.org");
+
+// handle links targeting new windows
+// 1=current window/tab, 2=new window, 3=new tab in most recent window
+pref("browser.link.open_newwindow", 3);
+
+// 0: no restrictions - divert everything
+// 1: don't divert window.open at all
+// 2: don't divert window.open with features
+pref("browser.link.open_newwindow.restriction", 0);
+
+// Enable browser frames (including OOP, except on Windows, where it doesn't
+// work), but make in-process browser frames the default.
+pref("dom.mozBrowserFramesEnabled", true);
+
+// Enable a (virtually) unlimited number of mozbrowser processes.
+// We'll run out of PIDs on UNIX-y systems before we hit this limit.
+pref("dom.ipc.processCount", 100000);
+
+pref("dom.ipc.browser_frames.oop_by_default", false);
+
+#if !defined(MOZ_MULET) && !defined(MOZ_GRAPHENE)
+pref("dom.meta-viewport.enabled", true);
+#endif
+
+//The waiting time in network manager.
+pref("network.gonk.ms-release-mms-connection", 30000);
+
+// Shortnumber matching needed for e.g. Brazil:
+// 03187654321 can be found with 87654321
+pref("dom.phonenumber.substringmatching.BR", 8);
+pref("dom.phonenumber.substringmatching.CO", 10);
+pref("dom.phonenumber.substringmatching.VE", 7);
+pref("dom.phonenumber.substringmatching.CL", 8);
+pref("dom.phonenumber.substringmatching.PE", 7);
+
+// NetworkStats
+#ifdef MOZ_WIDGET_GONK
+pref("dom.mozNetworkStats.enabled", true);
+pref("dom.webapps.firstRunWithSIM", true);
+#endif
+
+#ifdef MOZ_B2G_RIL
+// SingleVariant
+pref("dom.mozApps.single_variant_sourcedir", "/persist/svoperapps");
+#endif
+
+// WebSettings
+pref("dom.mozSettings.enabled", true);
+pref("dom.mozPermissionSettings.enabled", true);
+
+// controls if we want camera support
+pref("device.camera.enabled", true);
+pref("media.realtime_decoder.enabled", true);
+
+// TCPSocket
+pref("dom.mozTCPSocket.enabled", true);
+
+// "Preview" landing of bug 710563, which is bogged down in analysis
+// of talos regression. This is a needed change for higher-framerate
+// CSS animations, and incidentally works around an apparent bug in
+// our handling of requestAnimationFrame() listeners, which are
+// supposed to enable this REPEATING_PRECISE_CAN_SKIP behavior. The
+// secondary bug isn't really worth investigating since it's obseleted
+// by bug 710563.
+pref("layout.frame_rate.precise", true);
+
+// Handle hardware buttons in the b2g chrome package
+pref("b2g.keys.menu.enabled", true);
+
+// Display simulator software buttons
+pref("b2g.software-buttons", false);
+
+// Screen timeout in seconds
+pref("power.screen.timeout", 60);
+
+pref("full-screen-api.enabled", true);
+
+#ifndef MOZ_WIDGET_GONK
+// If we're not actually on physical hardware, don't make the top level widget
+// fullscreen when transitioning to fullscreen. This means in emulated
+// environments (like the b2g desktop client) we won't make the client window
+// fill the whole screen, we'll just make the content fill the client window,
+// i.e. it won't give the impression to content that the number of device
+// screen pixels changes!
+pref("full-screen-api.ignore-widgets", true);
+#endif
+
+pref("media.volume.steps", 10);
+
+#ifdef ENABLE_MARIONETTE
+//Enable/disable marionette server, set listening port
+pref("marionette.defaultPrefs.enabled", true);
+pref("marionette.defaultPrefs.port", 2828);
+#ifndef MOZ_WIDGET_GONK
+// On desktop builds, we need to force the socket to listen on localhost only
+pref("marionette.force-local", true);
+#endif
+#endif
+
+#ifdef MOZ_UPDATER
+// When we're applying updates, we can't let anything hang us on
+// quit+restart. The user has no recourse.
+pref("shutdown.watchdog.timeoutSecs", 10);
+// Timeout before the update prompt automatically installs the update
+pref("b2g.update.apply-prompt-timeout", 60000); // milliseconds
+// Amount of time to wait after the user is idle before prompting to apply an update
+pref("b2g.update.apply-idle-timeout", 600000); // milliseconds
+// Amount of time after which connection will be restarted if no progress
+pref("b2g.update.download-watchdog-timeout", 120000); // milliseconds
+pref("b2g.update.download-watchdog-max-retries", 5);
+
+pref("app.update.enabled", true);
+pref("app.update.auto", false);
+pref("app.update.silent", false);
+pref("app.update.staging.enabled", true);
+pref("app.update.service.enabled", true);
+
+pref("app.update.url", "https://aus5.mozilla.org/update/5/%PRODUCT%/%VERSION%/%BUILD_ID%/%PRODUCT_DEVICE%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/%IMEI%/update.xml");
+pref("app.update.channel", "@MOZ_UPDATE_CHANNEL@");
+
+// Interval at which update manifest is fetched. In units of seconds.
+pref("app.update.interval", 86400); // 1 day
+// Don't throttle background updates.
+pref("app.update.download.backgroundInterval", 0);
+
+// Retry update socket connections every 30 seconds in the cases of certain kinds of errors
+pref("app.update.socket.retryTimeout", 30000);
+
+// Max of 20 consecutive retries (total 10 minutes) before giving up and marking
+// the update download as failed.
+// Note: Offline errors will always retry when the network comes online.
+pref("app.update.socket.maxErrors", 20);
+
+// Enable update logging for now, to diagnose growing pains in the
+// field.
+pref("app.update.log", true);
+
+// SystemUpdate API
+pref("dom.system_update.active", "@mozilla.org/updates/update-prompt;1");
+#else
+// Explicitly disable the shutdown watchdog. It's enabled by default.
+// When the updater is disabled, we want to know about shutdown hangs.
+pref("shutdown.watchdog.timeoutSecs", -1);
+#endif
+
+// Allow webapps update checking
+pref("webapps.update.enabled", true);
+
+// Check daily for apps updates.
+pref("webapps.update.interval", 86400);
+
+// Extensions preferences
+pref("extensions.update.enabled", false);
+pref("extensions.getAddons.cache.enabled", false);
+
+// Context Menu
+pref("ui.click_hold_context_menus", true);
+pref("ui.click_hold_context_menus.delay", 400);
+
+// Enable device storage
+pref("device.storage.enabled", true);
+
+// Enable pre-installed applications
+pref("dom.webapps.useCurrentProfile", true);
+
+// Enable system message
+pref("dom.sysmsg.enabled", true);
+pref("media.plugins.enabled", false);
+pref("media.rtsp.enabled", true);
+pref("media.rtsp.video.enabled", true);
+
+// Disable printing (particularly, window.print())
+pref("dom.disable_window_print", true);
+
+// Disable window.showModalDialog
+pref("dom.disable_window_showModalDialog", true);
+
+// Enable new experimental html forms
+pref("dom.experimental_forms", true);
+pref("dom.forms.number", true);
+
+// Don't enable <input type=color> yet as we don't have a color picker
+// implemented for b2g (bug 875751)
+pref("dom.forms.color", false);
+
+// This preference instructs the JS engine to discard the
+// source of any privileged JS after compilation. This saves
+// memory, but makes things like Function.prototype.toSource()
+// fail.
+pref("javascript.options.discardSystemSource", true);
+
+// XXXX REMOVE FOR PRODUCTION. Turns on GC and CC logging
+pref("javascript.options.mem.log", false);
+
+// Increase mark slice time from 10ms to 30ms
+pref("javascript.options.mem.gc_incremental_slice_ms", 30);
+
+// Increase time to get more high frequency GC on benchmarks from 1000ms to 1500ms
+pref("javascript.options.mem.gc_high_frequency_time_limit_ms", 1500);
+
+pref("javascript.options.mem.gc_high_frequency_heap_growth_max", 300);
+pref("javascript.options.mem.gc_high_frequency_heap_growth_min", 120);
+pref("javascript.options.mem.gc_high_frequency_high_limit_mb", 40);
+pref("javascript.options.mem.gc_high_frequency_low_limit_mb", 0);
+pref("javascript.options.mem.gc_low_frequency_heap_growth", 120);
+pref("javascript.options.mem.high_water_mark", 6);
+pref("javascript.options.mem.gc_allocation_threshold_mb", 1);
+pref("javascript.options.mem.gc_min_empty_chunk_count", 1);
+pref("javascript.options.mem.gc_max_empty_chunk_count", 2);
+
+// Show/Hide scrollbars when active/inactive
+pref("ui.showHideScrollbars", 1);
+pref("ui.useOverlayScrollbars", 1);
+pref("ui.scrollbarFadeBeginDelay", 450);
+pref("ui.scrollbarFadeDuration", 0);
+
+// Scrollbar position follows the document `dir` attribute
+pref("layout.scrollbar.side", 1);
+
+// CSS Scroll Snapping
+pref("layout.css.scroll-snap.enabled", true);
+
+// Enable the ProcessPriorityManager, and give processes with no visible
+// documents a 1s grace period before they're eligible to be marked as
+// background. Background processes that are perceivable due to playing
+// media are given a longer grace period to accomodate changing tracks, etc.
+pref("dom.ipc.processPriorityManager.enabled", true);
+pref("dom.ipc.processPriorityManager.backgroundGracePeriodMS", 1000);
+pref("dom.ipc.processPriorityManager.backgroundPerceivableGracePeriodMS", 5000);
+pref("dom.ipc.processPriorityManager.temporaryPriorityLockMS", 5000);
+
+// Number of different background/foreground levels for background/foreground
+// processes. We use these different levels to force the low-memory killer to
+// kill processes in a LRU order.
+pref("dom.ipc.processPriorityManager.BACKGROUND.LRUPoolLevels", 5);
+pref("dom.ipc.processPriorityManager.BACKGROUND_PERCEIVABLE.LRUPoolLevels", 4);
+
+// Kernel parameters for process priorities. These affect how processes are
+// killed on low-memory and their relative CPU priorities.
+//
+// The kernel can only accept 6 (OomScoreAdjust, KillUnderKB) pairs. But it is
+// okay, kernel will still kill processes with larger OomScoreAdjust first even
+// its OomScoreAdjust don't have a corresponding KillUnderKB.
+
+pref("hal.processPriorityManager.gonk.MASTER.OomScoreAdjust", 0);
+pref("hal.processPriorityManager.gonk.MASTER.KillUnderKB", 4096);
+pref("hal.processPriorityManager.gonk.MASTER.cgroup", "");
+
+pref("hal.processPriorityManager.gonk.PREALLOC.OomScoreAdjust", 67);
+pref("hal.processPriorityManager.gonk.PREALLOC.cgroup", "apps/bg_non_interactive");
+
+pref("hal.processPriorityManager.gonk.FOREGROUND_HIGH.OomScoreAdjust", 67);
+pref("hal.processPriorityManager.gonk.FOREGROUND_HIGH.KillUnderKB", 5120);
+pref("hal.processPriorityManager.gonk.FOREGROUND_HIGH.cgroup", "apps/critical");
+
+pref("hal.processPriorityManager.gonk.FOREGROUND.OomScoreAdjust", 134);
+pref("hal.processPriorityManager.gonk.FOREGROUND.KillUnderKB", 6144);
+pref("hal.processPriorityManager.gonk.FOREGROUND.cgroup", "apps");
+
+pref("hal.processPriorityManager.gonk.FOREGROUND_KEYBOARD.OomScoreAdjust", 200);
+pref("hal.processPriorityManager.gonk.FOREGROUND_KEYBOARD.cgroup", "apps");
+
+pref("hal.processPriorityManager.gonk.BACKGROUND_PERCEIVABLE.OomScoreAdjust", 400);
+pref("hal.processPriorityManager.gonk.BACKGROUND_PERCEIVABLE.KillUnderKB", 8192);
+pref("hal.processPriorityManager.gonk.BACKGROUND_PERCEIVABLE.cgroup", "apps/bg_perceivable");
+
+pref("hal.processPriorityManager.gonk.BACKGROUND.OomScoreAdjust", 667);
+pref("hal.processPriorityManager.gonk.BACKGROUND.KillUnderKB", 20480);
+pref("hal.processPriorityManager.gonk.BACKGROUND.cgroup", "apps/bg_non_interactive");
+
+// Control group definitions (i.e., CPU priority groups) for B2G processes.
+//
+// memory_swappiness - 0 - The kernel will swap only to avoid an out of memory condition
+// memory_swappiness - 60 - The default value.
+// memory_swappiness - 100 - The kernel will swap aggressively.
+
+// Foreground apps
+pref("hal.processPriorityManager.gonk.cgroups.apps.cpu_shares", 1024);
+pref("hal.processPriorityManager.gonk.cgroups.apps.cpu_notify_on_migrate", 0);
+pref("hal.processPriorityManager.gonk.cgroups.apps.memory_swappiness", 10);
+
+// Foreground apps with high priority, 16x more CPU than foreground ones
+pref("hal.processPriorityManager.gonk.cgroups.apps/critical.cpu_shares", 16384);
+pref("hal.processPriorityManager.gonk.cgroups.apps/critical.cpu_notify_on_migrate", 0);
+pref("hal.processPriorityManager.gonk.cgroups.apps/critical.memory_swappiness", 0);
+
+// Background perceivable apps, ~10x less CPU than foreground ones
+pref("hal.processPriorityManager.gonk.cgroups.apps/bg_perceivable.cpu_shares", 103);
+pref("hal.processPriorityManager.gonk.cgroups.apps/bg_perceivable.cpu_notify_on_migrate", 0);
+pref("hal.processPriorityManager.gonk.cgroups.apps/bg_perceivable.memory_swappiness", 60);
+
+// Background apps, ~20x less CPU than foreground ones and ~2x less than perceivable ones
+pref("hal.processPriorityManager.gonk.cgroups.apps/bg_non_interactive.cpu_shares", 52);
+pref("hal.processPriorityManager.gonk.cgroups.apps/bg_non_interactive.cpu_notify_on_migrate", 0);
+pref("hal.processPriorityManager.gonk.cgroups.apps/bg_non_interactive.memory_swappiness", 100);
+
+// By default the compositor thread on gonk runs without real-time priority. RT
+// priority can be enabled by setting this pref to a value between 1 and 99.
+// Note that audio processing currently runs at RT priority 2 or 3 at most.
+//
+// If RT priority is disabled, then the compositor nice value is used. We prefer
+// to use a nice value of -4, which matches Android's preferences. Setting a preference
+// of RT priority 1 would mean it is higher than audio, which is -16. The compositor
+// priority must be below the audio thread.
+//
+// Do not change these values without gfx team review.
+pref("hal.gonk.COMPOSITOR.rt_priority", 0);
+pref("hal.gonk.COMPOSITOR.nice", -4);
+
+// Fire a memory pressure event when the system has less than Xmb of memory
+// remaining. You should probably set this just above Y.KillUnderKB for
+// the highest priority class Y that you want to make an effort to keep alive.
+// (For example, we want BACKGROUND_PERCEIVABLE to stay alive.) If you set
+// this too high, then we'll send out a memory pressure event every Z seconds
+// (see below), even while we have processes that we would happily kill in
+// order to free up memory.
+pref("gonk.notifyHardLowMemUnderKB", 14336);
+
+// Fire a memory pressure event when the system has less than Xmb of memory
+// remaining and then switch to the hard trigger, see above. This should be
+// placed above the BACKGROUND priority class.
+pref("gonk.notifySoftLowMemUnderKB", 43008);
+
+// We wait this long before polling the memory-pressure fd after seeing one
+// memory pressure event. (When we're not under memory pressure, we sit
+// blocked on a poll(), and this pref has no effect.)
+pref("gonk.systemMemoryPressureRecoveryPollMS", 5000);
+
+// Enable pre-launching content processes for improved startup time
+// (hiding latency).
+pref("dom.ipc.processPrelaunch.enabled", true);
+// Wait this long before pre-launching a new subprocess.
+pref("dom.ipc.processPrelaunch.delayMs", 5000);
+
+pref("dom.ipc.reuse_parent_app", false);
+
+// When a process receives a system message, we hold a CPU wake lock on its
+// behalf for this many seconds, or until it handles the system message,
+// whichever comes first.
+pref("dom.ipc.systemMessageCPULockTimeoutSec", 30);
+
+// Ignore the "dialog=1" feature in window.open.
+pref("dom.disable_window_open_dialog_feature", true);
+
+// Enable before keyboard events and after keyboard events.
+pref("dom.beforeAfterKeyboardEvent.enabled", true);
+
+// Screen reader support
+pref("accessibility.accessfu.activate", 2);
+pref("accessibility.accessfu.quicknav_modes", "Link,Heading,FormElement,Landmark,ListItem");
+// Active quicknav mode, index value of list from quicknav_modes
+pref("accessibility.accessfu.quicknav_index", 0);
+// Setting for an utterance order (0 - description first, 1 - description last).
+pref("accessibility.accessfu.utterance", 1);
+// Whether to skip images with empty alt text
+pref("accessibility.accessfu.skip_empty_images", true);
+// Setting to change the verbosity of entered text (0 - none, 1 - characters,
+// 2 - words, 3 - both)
+pref("accessibility.accessfu.keyboard_echo", 3);
+
+// Enable hit-target fluffing
+pref("ui.touch.radius.enabled", true);
+pref("ui.touch.radius.leftmm", 3);
+pref("ui.touch.radius.topmm", 5);
+pref("ui.touch.radius.rightmm", 3);
+pref("ui.touch.radius.bottommm", 2);
+
+pref("ui.mouse.radius.enabled", true);
+pref("ui.mouse.radius.leftmm", 3);
+pref("ui.mouse.radius.topmm", 5);
+pref("ui.mouse.radius.rightmm", 3);
+pref("ui.mouse.radius.bottommm", 2);
+
+// Disable native prompt
+pref("browser.prompt.allowNative", false);
+
+// Minimum delay in milliseconds between network activity notifications (0 means
+// no notifications). The delay is the same for both download and upload, though
+// they are handled separately. This pref is only read once at startup:
+// a restart is required to enable a new value.
+pref("network.activity.blipIntervalMilliseconds", 250);
+
+// By default we want the NetworkManager service to manage Gecko's offline
+// status for us according to the state of Wifi/cellular data connections.
+// In some environments, such as the emulator or hardware with other network
+// connectivity, this is not desireable, however, in which case this pref
+// can be flipped to false.
+pref("network.gonk.manage-offline-status", true);
+
+// On Firefox Mulet, we can't enable shared JSM scope
+// as it breaks most Firefox JSMs (see bug 961777)
+#ifndef MOZ_MULET
+// Break any JSMs or JS components that rely on shared scope
+#ifndef DEBUG
+pref("jsloader.reuseGlobal", true);
+#endif
+#endif
+
+// Enable font inflation for browser tab content.
+pref("font.size.inflation.minTwips", 120);
+// And disable it for lingering master-process UI.
+pref("font.size.inflation.disabledInMasterProcess", true);
+
+// Enable freeing dirty pages when minimizing memory; this reduces memory
+// consumption when applications are sent to the background.
+pref("memory.free_dirty_pages", true);
+
+// Enable the Linux-specific, system-wide memory reporter.
+pref("memory.system_memory_reporter", true);
+
+// Don't dump memory reports on OOM, by default.
+pref("memory.dump_reports_on_oom", false);
+
+pref("layout.framevisibility.numscrollportwidths", 1);
+pref("layout.framevisibility.numscrollportheights", 1);
+
+// Wait up to this much milliseconds when orientation changed
+pref("layers.orientation.sync.timeout", 1000);
+
+// Animate the orientation change
+pref("b2g.orientation.animate", true);
+
+// Don't discard WebGL contexts for foreground apps on memory
+// pressure.
+pref("webgl.can-lose-context-in-foreground", false);
+
+// Allow nsMemoryInfoDumper to create a fifo in the temp directory. We use
+// this fifo to trigger about:memory dumps, among other things.
+pref("memory_info_dumper.watch_fifo.enabled", true);
+pref("memory_info_dumper.watch_fifo.directory", "/data/local");
+
+// See ua-update.json.in for the packaged UA override list
+pref("general.useragent.updates.enabled", true);
+pref("general.useragent.updates.url", "https://dynamicua.cdn.mozilla.net/0/%APP_ID%");
+pref("general.useragent.updates.interval", 604800); // 1 week
+pref("general.useragent.updates.retry", 86400); // 1 day
+// Device ID can be composed of letter, numbers, hyphen ("-") and dot (".")
+pref("general.useragent.device_id", "");
+
+// Add Mozilla AudioChannel APIs.
+pref("media.useAudioChannelAPI", true);
+
+pref("b2g.version", @MOZ_B2G_VERSION@);
+pref("b2g.osName", @MOZ_B2G_OS_NAME@);
+
+// Disable console buffering to save memory.
+pref("consoleservice.buffered", false);
+
+#ifdef MOZ_WIDGET_GONK
+// Performance testing suggests 2k is a better page size for SQLite.
+pref("toolkit.storage.pageSize", 2048);
+#endif
+
+// The url of the manifest we use for ADU pings.
+pref("ping.manifestURL", "https://marketplace.firefox.com/packaged.webapp");
+
+// Enable the disk space watcher
+pref("disk_space_watcher.enabled", true);
+
+// SNTP preferences.
+pref("network.sntp.maxRetryCount", 10);
+pref("network.sntp.refreshPeriod", 86400); // In seconds.
+pref("network.sntp.pools", // Servers separated by ';'.
+ "0.pool.ntp.org;1.pool.ntp.org;2.pool.ntp.org;3.pool.ntp.org");
+pref("network.sntp.port", 123);
+pref("network.sntp.timeout", 30); // In seconds.
+
+// Allow ADB to run for this many hours before disabling
+// (only applies when marionette is disabled)
+// 0 disables the timer.
+pref("b2g.adb.timeout-hours", 12);
+
+// InputMethod so we can do soft keyboards
+pref("dom.mozInputMethod.enabled", true);
+
+// Absolute path to the devtool unix domain socket file used
+// to communicate with a usb cable via adb forward
+pref("devtools.debugger.unix-domain-socket", "/data/local/debugger-socket");
+
+// enable Skia/GL (OpenGL-accelerated 2D drawing) for large enough 2d canvases,
+// falling back to Skia/software for smaller canvases
+#ifdef MOZ_WIDGET_GONK
+pref("gfx.canvas.azure.backends", "skia");
+pref("gfx.canvas.azure.accelerated", true);
+#endif
+
+// Turn on dynamic cache size for Skia
+pref("gfx.canvas.skiagl.dynamic-cache", true);
+
+// Limit skia to canvases the size of the device screen or smaller
+pref("gfx.canvas.max-size-for-skia-gl", -1);
+
+// enable fence with readpixels for SurfaceStream
+pref("gfx.gralloc.fence-with-readpixels", true);
+
+// enable screen mirroring to external display
+pref("gfx.screen-mirroring.enabled", true);
+
+// The url of the page used to display network error details.
+pref("b2g.neterror.url", "net_error.html");
+
+// Enable Web Speech synthesis API
+pref("media.webspeech.synth.enabled", true);
+
+// Enable Web Speech recognition API
+pref("media.webspeech.recognition.enable", true);
+
+// Downloads API
+pref("dom.mozDownloads.enabled", true);
+pref("dom.downloads.max_retention_days", 7);
+
+// External Helper Application Handling
+//
+// All external helper application handling can require the docshell to be
+// active before allowing the external helper app service to handle content.
+//
+// To prevent SD card DoS attacks via downloads we disable background handling.
+//
+pref("security.exthelperapp.disable_background_handling", true);
+
+// Inactivity time in milliseconds after which we shut down the OS.File worker.
+pref("osfile.reset_worker_delay", 5000);
+
+// APZ physics settings, tuned by UX designers
+pref("apz.axis_lock.mode", 2); // Use "sticky" axis locking
+pref("apz.fling_curve_function_x1", "0.41");
+pref("apz.fling_curve_function_y1", "0.0");
+pref("apz.fling_curve_function_x2", "0.80");
+pref("apz.fling_curve_function_y2", "1.0");
+pref("apz.fling_curve_threshold_inches_per_ms", "0.01");
+pref("apz.fling_friction", "0.0019");
+pref("apz.max_velocity_inches_per_ms", "0.07");
+pref("apz.overscroll.enabled", true);
+pref("apz.displayport_expiry_ms", 0); // causes issues on B2G, see bug 1250924
+
+// For event-regions based hit-testing
+pref("layout.event-regions.enabled", true);
+
+// This preference allows FirefoxOS apps (and content, I think) to force
+// the use of software (instead of hardware accelerated) 2D canvases by
+// creating a context like this:
+//
+// canvas.getContext('2d', { willReadFrequently: true })
+//
+// Using a software canvas can save memory when JS calls getImageData()
+// on the canvas frequently. See bug 884226.
+pref("gfx.canvas.willReadFrequently.enable", true);
+
+// Disable autofocus until we can have it not bring up the keyboard.
+// https://bugzilla.mozilla.org/show_bug.cgi?id=965763
+pref("browser.autofocus", false);
+
+// Enable wakelock
+pref("dom.wakelock.enabled", true);
+
+// Enable webapps add-ons
+pref("dom.apps.reviewer_paths", "/reviewers/,/extension/reviewers/");
+
+// New implementation to unify touch-caret and selection-carets.
+pref("layout.accessiblecaret.enabled", true);
+
+// Show the selection bars at the two ends of the selection highlight. Required
+// by the spec in bug 921965.
+pref("layout.accessiblecaret.bar.enabled", true);
+
+// Hide the caret in cursor mode after 3 seconds.
+pref("layout.accessiblecaret.timeout_ms", 3000);
+
+// Hide carets and text selection dialog during scrolling.
+pref("layout.accessiblecaret.always_show_when_scrolling", false);
+
+// Enable sync with Firefox Accounts.
+pref("services.sync.fxaccounts.enabled", true);
+pref("identity.fxaccounts.enabled", true);
+
+pref("identity.fxaccounts.remote.oauth.uri", "https://oauth.accounts.firefox.com/v1");
+pref("identity.fxaccounts.remote.profile.uri", "https://profile.accounts.firefox.com/v1");
+
+// Disable Firefox Accounts device registration until bug 1238895 is fixed.
+pref("identity.fxaccounts.skipDeviceRegistration", true);
+
+// Enable mapped array buffer.
+pref("dom.mapped_arraybuffer.enabled", true);
+
+// SystemUpdate API
+pref("dom.system_update.enabled", true);
+
+// UDPSocket API
+pref("dom.udpsocket.enabled", true);
+
+// Enable TV Manager API
+pref("dom.tv.enabled", true);
+
+// Enable Inputport Manager API
+pref("dom.inputport.enabled", true);
+
+pref("dom.mozSettings.SettingsDB.debug.enabled", true);
+pref("dom.mozSettings.SettingsManager.debug.enabled", true);
+pref("dom.mozSettings.SettingsRequestManager.debug.enabled", true);
+pref("dom.mozSettings.SettingsService.debug.enabled", true);
+
+pref("dom.mozSettings.SettingsDB.verbose.enabled", false);
+pref("dom.mozSettings.SettingsManager.verbose.enabled", false);
+pref("dom.mozSettings.SettingsRequestManager.verbose.enabled", false);
+pref("dom.mozSettings.SettingsService.verbose.enabled", false);
+
+// Controlling whether we want to allow forcing some Settings
+// IndexedDB transactions to be opened as readonly or keep everything as
+// readwrite.
+pref("dom.mozSettings.allowForceReadOnly", false);
+
+// Comma separated list of activity names that can only be provided by
+// the system app in dev mode.
+pref("dom.activities.developer_mode_only", "import-app");
+
+// mulet apparently loads firefox.js as well as b2g.js, so we have to explicitly
+// disable serviceworkers and push here to get them disabled in mulet.
+pref("dom.serviceWorkers.enabled", false);
+pref("dom.push.enabled", false);
+
+#if defined(RELEASE_OR_BETA)
+// Bug 1278848: Enable service worker notifications on release B2G once
+// they're ready.
+pref("dom.webnotifications.serviceworker.enabled", false);
+#else
+pref("dom.webnotifications.serviceworker.enabled", true);
+#endif
+
+// Retain at most 10 processes' layers buffers
+pref("layers.compositor-lru-size", 10);
+
+// In B2G by deafult any AudioChannelAgent is muted when created.
+pref("dom.audiochannel.mutedByDefault", true);
+
+// Default device name for Presentation API
+pref("dom.presentation.device.name", "Firefox OS");
+
+// Enable notification of performance timing
+pref("dom.performance.enable_notify_performance_timing", true);
+
+// Multi-screen
+pref("b2g.multiscreen.chrome_remote_url", "chrome://b2g/content/shell_remote.html");
+pref("b2g.multiscreen.system_remote_url", "index_remote.html");
+
+// Audio competing between tabs
+pref("dom.audiochannel.audioCompeting", false);
+
+// Because we can't have nice things.
+#ifdef MOZ_GRAPHENE
+#include ../graphene/graphene.js
+#endif