The Tor Browser: browser/metro/profile/metro.js@b8a032363ba2 (annotated)

browser/metro/profile/metro.js@b8a032363ba2 (annotated)

browser/metro/profile/metro.js

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* 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
 #ifdef DEBUG
 // disable content and content script caching
 pref("nglayout.debug.disable_xul_cache", true);
 pref("nglayout.debug.disable_xul_fastload", true);
 pref("devtools.errorconsole.enabled", true);
 pref("devtools.chrome.enabled", true);
 #else
 pref("devtools.errorconsole.enabled", false);
 pref("devtools.chrome.enabled", false);
 #endif
 // Automatically submit crash reports
 #ifdef RELEASE_BUILD
 pref("app.crashreporter.autosubmit", false);
 pref("app.crashreporter.submitURLs", false);
 #else
 // For Nightly and Aurora we turn this on by default
 pref("app.crashreporter.autosubmit", true);
 pref("app.crashreporter.submitURLs", false);
 #endif
 // Has the user been prompted about crash reporting?
 pref("app.crashreporter.prompted", false);
 // Debug prefs, see input.js
 pref("metro.debug.colorizeInputOverlay", false);
 pref("metro.debug.selection.displayRanges", false);
 pref("metro.debug.selection.dumpRanges", false);
 pref("metro.debug.selection.dumpEvents", false);
 // Private browsing is disabled by default until implementation and testing are complete
 pref("metro.private_browsing.enabled", false);
 // Enable tab-modal prompts
 pref("prompts.tab_modal.enabled", true);
 // NewTabUtils pref related to top site thumbnail updating.
 pref("browser.newtabpage.enabled", true);
 // Enable off main thread compositing
 pref("layers.offmainthreadcomposition.enabled", true);
 pref("layers.async-pan-zoom.enabled", true);
 pref("layers.componentalpha.enabled", false);
 // Prefs to control the async pan/zoom behaviour
 pref("apz.touch_start_tolerance", "0.1"); // dpi * tolerance = pixel threshold
 pref("apz.pan_repaint_interval", 50);   // prefer 20 fps
 pref("apz.fling_repaint_interval", 50); // prefer 20 fps
 pref("apz.fling_stopped_threshold", "0.2");
 pref("apz.x_skate_size_multiplier", "2.5");
 pref("apz.y_skate_size_multiplier", "2.5");
 pref("apz.min_skate_speed", "10.0");
 // 0 = free, 1 = standard, 2 = sticky
 pref("apz.axis_lock_mode", 2);
 pref("apz.cross_slide.enabled", true);
 pref("apz.subframe.enabled", true);
 // Enable Microsoft TSF support by default for imes.
 pref("intl.tsf.enable", true);
 pref("intl.tsf.support_imm", false);
 pref("intl.tsf.hack.atok.create_native_caret", false);
 pref("general.autoScroll", true);
 pref("general.smoothScroll", true);
 pref("general.smoothScroll.durationToIntervalRatio", 200);
 pref("mousewheel.enable_pixel_scrolling", true);
 // For browser.xml binding
 //
 // cacheRatio* is a ratio that determines the amount of pixels to cache. The
 // ratio is multiplied by the viewport width or height to get the displayport's
 // width or height, respectively.
 //
 // (divide integer value by 1000 to get the ratio)
 //
 // For instance: cachePercentageWidth is 1500
 //               viewport height is 500
 //               => display port height will be 500 * 1.5 = 750
 //
 pref("toolkit.browser.cacheRatioWidth", 2000);
 pref("toolkit.browser.cacheRatioHeight", 3000);
 // How long before a content view (a handle to a remote scrollable object)
 // expires.
 pref("toolkit.browser.contentViewExpire", 3000);
 pref("toolkit.defaultChromeURI", "chrome://browser/content/browser.xul");
 pref("browser.chromeURL", "chrome://browser/content/");
 pref("browser.tabs.remote", false);
 // Telemetry
 #ifdef MOZ_TELEMETRY_ON_BY_DEFAULT
 pref("toolkit.telemetry.enabledPreRelease", true);
 #else
 pref("toolkit.telemetry.enabled", true);
 #endif
 pref("toolkit.telemetry.prompted", 2);
 pref("toolkit.screen.lock", false);
 // From libpref/src/init/all.js. Disabling text zoom in favor of APZ zoom. See bug 936940.
 pref("zoom.minPercent", 100);
 pref("zoom.maxPercent", 100);
 pref("toolkit.zoomManager.zoomValues", "1");
 // Device pixel to CSS px ratio, in percent. Set to -1 to calculate based on display density.
 pref("browser.viewport.scaleRatio", -1);
 // use long press to display a context menu
 pref("ui.click_hold_context_menus", false);
 // offline cache prefs
 pref("browser.offline-apps.notify", 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);
 pref("network.protocol-handler.warn-external.ms-windows-store", false);
 pref("network.protocol-handler.external.ms-windows-store", true);
 /* startui prefs */
 // display the overlay nav buttons
 pref("browser.display.overlaynavbuttons", true);
 // max number of top site tiles to display in the startui
 pref("browser.display.startUI.topsites.maxresults", 8);
 // max items for the bookmarks compartment in the startui
 pref("browser.display.startUI.bookmarks.maxresults", 16);
 // max items for the history compartment in the startui
 pref("browser.display.startUI.history.maxresults", 16);
 // Number of times to display firstrun instructions on new tab page
 pref("browser.firstrun.count", 3);
 // Has the content first run been dismissed
 pref("browser.firstrun-content.dismissed", false);
 // Backspace and Shift+Backspace behavior
 // 0 goes Back/Forward
 // 1 act like PgUp/PgDown
 // 2 and other values, nothing
 pref("browser.backspace_action", 0);
 // session history
 pref("browser.sessionhistory.max_entries", 50);
 // On startup, don't automatically restore tabs
 pref("browser.startup.page", 1);
 /* session store */
 pref("browser.sessionstore.resume_from_crash", true);
 pref("browser.sessionstore.resume_session_once", false);
 pref("browser.sessionstore.resume_from_crash_timeout", 60); // minutes
 // minimal interval between two save operations in milliseconds
 pref("browser.sessionstore.interval", 15000); // milliseconds
 // maximum amount of POSTDATA to be saved in bytes per history entry (-1 = all of it)
 // (NB: POSTDATA will be saved either entirely or not at all)
 pref("browser.sessionstore.postdata", 0);
 // on which sites to save text data, POSTDATA and cookies
 // 0 = everywhere, 1 = unencrypted sites, 2 = nowhere
 pref("browser.sessionstore.privacy_level", 0);
 // the same as browser.sessionstore.privacy_level, but for saving deferred session data
 pref("browser.sessionstore.privacy_level_deferred", 1);
 // how many tabs can be reopened (per window)
 pref("browser.sessionstore.max_tabs_undo", 10);
 // number of crashes that can occur before the about:sessionrestore page is displayed
 // (this pref has no effect if more than 6 hours have passed since the last crash)
 pref("browser.sessionstore.max_resumed_crashes", 1);
 // restore_on_demand overrides MAX_CONCURRENT_TAB_RESTORES (sessionstore constant)
 // and restore_hidden_tabs. When true, tabs will not be restored until they are
 // focused (also applies to tabs that aren't visible). When false, the values
 // for MAX_CONCURRENT_TAB_RESTORES and restore_hidden_tabs are respected.
 // Selected tabs are always restored regardless of this pref.
 pref("browser.sessionstore.restore_on_demand", true);
 /* these should help performance */
 pref("mozilla.widget.force-24bpp", true);
 pref("mozilla.widget.use-buffer-pixmap", true);
 pref("mozilla.widget.disable-native-theme", false);
 pref("layout.reflow.synthMouseMove", false);
 /* "Preview" of framerate increase for animations, discussed in 710563. */
 pref("layout.frame_rate.precise", 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.addToRecentDocs", true);
 pref("browser.download.manager.displayedHistoryDays", 7);
 pref("browser.download.manager.resumeOnWakeDelay", 10000);
 pref("browser.download.manager.quitBehavior", 0);
 /* download alerts (disabled above) */
 pref("alerts.totalOpenTime", 6000);
 /* download helper */
 pref("browser.helperApps.deleteTempFileOnExit", false);
 /* password manager */
 pref("signon.rememberSignons", true);
 // this will automatically enable inline spellchecking (if it is available) for
 // editable elements in HTML
 // 0 = spellcheck nothing
 // 1 = check multi-line controls [default]
 // 2 = check multi/single line controls
 pref("layout.spellcheckDefault", 1);
 /* extension manager and xpinstall */
 // Completely disable extensions
 pref("extensions.defaultProviders.enabled", false);
 // Disable version checks making addons compatible by default
 pref("extensions.strictCompatibility", false);
 // Disable all add-on locations other than the profile
 pref("extensions.enabledScopes", 1);
 // Auto-disable any add-ons that are "dropped in" to the profile
 pref("extensions.autoDisableScopes", 1);
 // Disable add-on installation via the web-exposed APIs
 pref("xpinstall.enabled", false);
 pref("xpinstall.whitelist.add", "addons.mozilla.org");
 pref("extensions.autoupdate.enabled", false);
 pref("extensions.update.enabled", false);
 /* blocklist preferences */
 pref("extensions.blocklist.enabled", true);
 pref("extensions.blocklist.interval", 86400);
 pref("extensions.blocklist.url", "https://addons.mozilla.org/blocklist/3/%APP_ID%/%APP_VERSION%/%PRODUCT%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/%PING_COUNT%/%TOTAL_PING_COUNT%/%DAYS_SINCE_LAST_PING%/");
 pref("extensions.blocklist.detailsURL", "https://www.mozilla.org/%LOCALE%/blocklist/");
 pref("extensions.showMismatchUI", false);
 /* block popups by default, and notify the user about blocked popups */
 pref("dom.disable_open_during_load", true);
 pref("privacy.popups.showBrowserMessage", true);
 // Metro Firefox keeps this set to -1 when donottrackheader.enabled is false.
 pref("privacy.donottrackheader.value", -1);
 /* disable opening windows with the dialog feature */
 pref("dom.disable_window_open_dialog_feature", true);
 pref("keyword.enabled", 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);
 // Trun on F7 caret browsing hot key
 pref("accessibility.browsewithcaret_shortcut.enabled", true);
 pref("accessibility.browsewithcaret", false);
 // Whether or not we show a dialog box informing the user that the update was
 // successfully applied.
 pref("app.update.showInstalledUI", false);
 // pointer to the default engine name
 pref("browser.search.defaultenginename", "chrome://browser/locale/region.properties");
 // SSL error page behaviour
 pref("browser.ssl_override_behavior", 2);
 pref("browser.xul.error_pages.expert_bad_cert", false);
 // disable logging for the search service by default
 pref("browser.search.log", false);
 // ordering of search engines in the engine list.
 pref("browser.search.order.1", "chrome://browser/locale/region.properties");
 pref("browser.search.order.2", "chrome://browser/locale/region.properties");
 pref("browser.search.order.3", "chrome://browser/locale/region.properties");
 // send ping to the server to update
 pref("browser.search.update", true);
 // disable logging for the search service update system by default
 pref("browser.search.update.log", false);
 // Check whether we need to perform engine updates every 6 hours
 pref("browser.search.update.interval", 21600);
 // enable search suggestions by default
 pref("browser.search.suggest.enabled", true);
 // tell the search service that we don't really expose the "current engine"
 pref("browser.search.noCurrentEngine", true);
 #ifdef MOZ_OFFICIAL_BRANDING
 // {moz:official} expands to "official"
 pref("browser.search.official", true);
 #endif
 // enable xul error pages
 pref("browser.xul.error_pages.enabled", true);
 // Specify emptyRestriction = 0 so that bookmarks appear in the list by default
 pref("browser.urlbar.default.behavior", 0);
 pref("browser.urlbar.default.behavior.emptyRestriction", 0);
 // Let the faviconservice know that we display favicons as 25x25px so that it
 // uses the right size when optimizing favicons
 pref("places.favicons.optimizeToDimension", 25);
 // various and sundry awesomebar prefs (should remove/re-evaluate
 // these once bug 447900 is fixed)
 pref("browser.urlbar.trimURLs", true);
 pref("browser.urlbar.formatting.enabled", true);
 pref("browser.urlbar.clickSelectsAll", true);
 pref("browser.urlbar.doubleClickSelectsAll", true);
 pref("browser.urlbar.autoFill", false);
 pref("browser.urlbar.matchOnlyTyped", false);
 pref("browser.urlbar.matchBehavior", 1);
 pref("browser.urlbar.filter.javascript", true);
 pref("browser.urlbar.maxRichResults", 8);
 pref("browser.urlbar.search.chunkSize", 1000);
 pref("browser.urlbar.search.timeout", 100);
 pref("browser.urlbar.restrict.history", "^");
 pref("browser.urlbar.restrict.bookmark", "*");
 pref("browser.urlbar.restrict.tag", "+");
 pref("browser.urlbar.match.title", "#");
 pref("browser.urlbar.match.url", "@");
 pref("browser.history.grouping", "day");
 pref("browser.history.showSessions", false);
 pref("browser.sessionhistory.max_entries", 50);
 pref("browser.history_expire_sites", 40000);
 pref("browser.places.migratePostDataAnnotations", true);
 pref("browser.places.updateRecentTagsUri", true);
 pref("places.frecency.numVisits", 10);
 pref("places.frecency.numCalcOnIdle", 50);
 pref("places.frecency.numCalcOnMigrate", 50);
 pref("places.frecency.updateIdleTime", 60000);
 pref("places.frecency.firstBucketCutoff", 4);
 pref("places.frecency.secondBucketCutoff", 14);
 pref("places.frecency.thirdBucketCutoff", 31);
 pref("places.frecency.fourthBucketCutoff", 90);
 pref("places.frecency.firstBucketWeight", 100);
 pref("places.frecency.secondBucketWeight", 70);
 pref("places.frecency.thirdBucketWeight", 50);
 pref("places.frecency.fourthBucketWeight", 30);
 pref("places.frecency.defaultBucketWeight", 10);
 pref("places.frecency.embedVisitBonus", 0);
 pref("places.frecency.linkVisitBonus", 100);
 pref("places.frecency.typedVisitBonus", 2000);
 pref("places.frecency.bookmarkVisitBonus", 150);
 pref("places.frecency.downloadVisitBonus", 0);
 pref("places.frecency.permRedirectVisitBonus", 0);
 pref("places.frecency.tempRedirectVisitBonus", 0);
 pref("places.frecency.defaultVisitBonus", 0);
 pref("places.frecency.unvisitedBookmarkBonus", 140);
 pref("places.frecency.unvisitedTypedBonus", 200);
 // 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);
 // open in tab preferences
 // 0=default window, 1=current window/tab, 2=new window, 3=new tab in most window
 pref("browser.link.open_external", 3);
 pref("browser.link.open_newwindow", 3);
 // 0=force all new windows to tabs, 1=don't force, 2=only force those with no features set
 pref("browser.link.open_newwindow.restriction", 0);
 // 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);
 pref("plugins.force.wmode", "opaque");
 // What default should we use for the time span in the sanitizer:
 // 0 - Clear everything
 // 1 - Last Hour
 // 2 - Last 2 Hours
 // 3 - Last 4 Hours
 // 4 - Today
 pref("privacy.sanitize.timeSpan", 1);
 pref("privacy.sanitize.sanitizeOnShutdown", false);
 pref("privacy.sanitize.migrateFx3Prefs",    false);
 // enable geo
 pref("geo.enabled", true);
 pref("geo.wifi.uri", "https://www.googleapis.com/geolocation/v1/geolocate?key=%GOOGLE_API_KEY%");
 // snapped view
 pref("browser.ui.snapped.maxWidth", 600);
 // kinetic tweakables
 pref("browser.ui.kinetic.updateInterval", 16);
 pref("browser.ui.kinetic.exponentialC", 1400);
 pref("browser.ui.kinetic.polynomialC", 100);
 pref("browser.ui.kinetic.swipeLength", 160);
 pref("browser.ui.zoom.animationDuration", 200); // ms duration of double-tap zoom animation
 pref("ui.mouse.radius.enabled", true);
 pref("ui.touch.radius.enabled", true);
 // plugins
 pref("plugin.disable", true);
 pref("dom.ipc.plugins.enabled", true);
 // process priority
 // higher values give content process less CPU time
 pref("dom.ipc.content.nice", 1);
 // product URLs
 // The breakpad report server to link to in about:crashes
 pref("breakpad.reportURL", "https://crash-stats.mozilla.com/report/index/");
 // TODO: This is not the correct article for metro!!!
 pref("app.sync.tutorialURL", "https://support.mozilla.org/kb/sync-firefox-between-desktop-and-mobile");
 pref("app.support.baseURL", "https://support.mozilla.org/1/touch/%VERSION%/%OS%/%LOCALE%/");
 pref("app.support.inputURL", "https://input.mozilla.org/feedback/metrofirefox");
 pref("app.privacyURL", "http://www.mozilla.org/%LOCALE%/legal/privacy/firefox.html");
 pref("app.creditsURL", "http://www.mozilla.org/credits/");
 pref("app.channelURL", "http://www.mozilla.org/%LOCALE%/firefox/channel/");
 // 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.
 // Override some named colors to avoid inverse OS themes
 /* app update prefs */
 #ifdef MOZ_UPDATER
 // Whether or not app updates are enabled
 pref("app.update.enabled", true);
 // This preference turns on app.update.mode and allows automatic download and
 // install to take place. We use a separate boolean toggle for this to make
 // the UI easier to construct.
 pref("app.update.auto", true);
 // See chart in nsUpdateService.js source for more details
 pref("app.update.mode", 0);
 // Enables update checking in the Metro environment.
 // add-on incompatibilities are ignored by updates in Metro.
 pref("app.update.metro.enabled", true);
 // If set to true, the Update Service will present no UI for any event.
 pref("app.update.silent", true);
 // If set to true, the Update Service will apply updates in the background
 // when it finishes downloading them.
 pref("app.update.staging.enabled", true);
 // Update service URL:
 #ifndef RELEASE_BUILD
 pref("app.update.url", "https://aus4.mozilla.org/update/3/%PRODUCT%/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/update.xml");
 #else
 pref("app.update.url", "https://aus3.mozilla.org/update/3/%PRODUCT%/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/update.xml");
 #endif
 // Show the Update Checking/Ready UI when the user was idle for x seconds
 pref("app.update.idletime", 60);
 // Whether or not we show a dialog box informing the user that the update was
 // successfully applied. This is off in Firefox by default since we show a
 // upgrade start page instead! Other apps may wish to show this UI, and supply
 // a whatsNewURL field in their brand.properties that contains a link to a page
 // which tells users what's new in this new update.
 pref("app.update.showInstalledUI", false);
 // 0 = suppress prompting for incompatibilities if there are updates available
 //     to newer versions of installed addons that resolve them.
 // 1 = suppress prompting for incompatibilities only if there are VersionInfo
 //     updates available to installed addons that resolve them, not newer
 //     versions.
 pref("app.update.incompatible.mode", 0);
 // Whether or not to attempt using the service for updates.
 #ifdef MOZ_MAINTENANCE_SERVICE
 pref("app.update.service.enabled", true);
 #endif
 // The minimum delay in seconds for the timer to fire.
 // default=2 minutes
 pref("app.update.timerMinimumDelay", 120);
 // Enables some extra Application Update Logging (can reduce performance)
 pref("app.update.log", false);
 // The number of general background check failures to allow before notifying the
 // user of the failure. User initiated update checks always notify the user of
 // the failure.
 pref("app.update.backgroundMaxErrors", 10);
 // The aus update xml certificate checks for application update are disabled on
 // Windows since the mar signature check which is currently only implemented on
 // Windows is sufficient for preventing us from applying a mar that is not
 // valid.
 // When |app.update.cert.requireBuiltIn| is true or not specified the
 // final certificate and all certificates the connection is redirected to before
 // the final certificate for the url specified in the |app.update.url|
 // preference must be built-in.
 pref("app.update.cert.requireBuiltIn", false);
 // When |app.update.cert.checkAttributes| is true or not specified the
 // certificate attributes specified in the |app.update.certs.| preference branch
 // are checked against the certificate for the url specified by the
 // |app.update.url| preference.
 pref("app.update.cert.checkAttributes", false);
 // User-settable override to app.update.url for testing purposes.
 //pref("app.update.url.override", "");
 // replace newlines with spaces on paste into single-line text boxes
 pref("editor.singleLine.pasteNewlines", 2);
 #ifdef MOZ_SERVICES_SYNC
 // sync service
 pref("services.sync.registerEngines", "Tab,Bookmarks,Form,History,Password,Prefs");
 // prefs to sync by default
 pref("services.sync.prefs.sync.browser.tabs.warnOnClose", true);
 pref("services.sync.prefs.sync.devtools.errorconsole.enabled", true);
 pref("services.sync.prefs.sync.lightweightThemes.isThemeSelected", true);
 pref("services.sync.prefs.sync.lightweightThemes.usedThemes", true);
 pref("services.sync.prefs.sync.privacy.donottrackheader.enabled", true);
 pref("services.sync.prefs.sync.privacy.donottrackheader.value", true);
 pref("services.sync.prefs.sync.signon.rememberSignons", true);
 #endif
 // 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", 50);
 pref("ui.dragThresholdY", 50);
 // prevent tooltips from showing up
 pref("browser.chrome.toolbar_tips", false);
 #ifdef NIGHTLY_BUILD
 // Completely disable pdf.js as an option to preview pdfs within firefox.
 // Note: if this is not disabled it does not necessarily mean pdf.js is the pdf
 // handler just that it is an option.
 pref("pdfjs.disabled", true);
 // Used by pdf.js to know the first time firefox is run with it installed so it
 // can become the default pdf viewer.
 pref("pdfjs.firstRun", true);
 // The values of preferredAction and alwaysAskBeforeHandling before pdf.js
 // became the default.
 pref("pdfjs.previousHandler.preferredAction", 0);
 pref("pdfjs.previousHandler.alwaysAskBeforeHandling", false);
 #endif
 #ifdef NIGHTLY_BUILD
 // Shumay is currently experimental.  Toggle this pref to enable Shumway for
 // testing and development.
 pref("shumway.disabled", true);
 // When Shumway is enabled, use it all the time, not only when Flash is set to
 // click-to-play (because Metro doesn't even load the native Flash plugin).
 pref("shumway.ignoreCTP", true);
 #endif
 // The maximum amount of decoded image data we'll willingly keep around (we
 // might keep around more than this, but we'll try to get down to this value).
 // (This is intentionally on the high side; see bug 746055.)
 pref("image.mem.max_decoded_image_kb", 256000);
 // enable touch events interfaces
 pref("dom.w3c_touch_events.enabled", 1);
 pref("dom.w3c_touch_events.safetyX", 5); // escape borders in units of 1/240"
 pref("dom.w3c_touch_events.safetyY", 20); // escape borders in units of 1/240"
 #ifdef MOZ_SAFE_BROWSING
 // Safe browsing does nothing unless this pref is set
 pref("browser.safebrowsing.enabled", true);
 // Prevent loading of pages identified as malware
 pref("browser.safebrowsing.malware.enabled", true);
 // Non-enhanced mode (local url lists) URL list to check for updates
 pref("browser.safebrowsing.provider.0.updateURL", "https://safebrowsing.google.com/safebrowsing/downloads?client={moz:client}&appver={moz:version}&pver=2.2&key=%GOOGLE_API_KEY%");
 pref("browser.safebrowsing.dataProvider", 0);
 // Does the provider name need to be localizable?
 pref("browser.safebrowsing.provider.0.name", "Google");
 pref("browser.safebrowsing.provider.0.reportURL", "https://safebrowsing.google.com/safebrowsing/report?");
 pref("browser.safebrowsing.provider.0.gethashURL", "https://safebrowsing.google.com/safebrowsing/gethash?client={moz:client}&appver={moz:version}&pver=2.2");
 // HTML report pages
 pref("browser.safebrowsing.provider.0.reportGenericURL", "http://{moz:locale}.phish-generic.mozilla.com/?hl={moz:locale}");
 pref("browser.safebrowsing.provider.0.reportErrorURL", "http://{moz:locale}.phish-error.mozilla.com/?hl={moz:locale}");
 pref("browser.safebrowsing.provider.0.reportPhishURL", "http://{moz:locale}.phish-report.mozilla.com/?hl={moz:locale}");
 pref("browser.safebrowsing.provider.0.reportMalwareURL", "http://{moz:locale}.malware-report.mozilla.com/?hl={moz:locale}");
 pref("browser.safebrowsing.provider.0.reportMalwareErrorURL", "http://{moz:locale}.malware-error.mozilla.com/?hl={moz:locale}");
 // FAQ URLs
 pref("browser.geolocation.warning.infoURL", "https://www.mozilla.org/%LOCALE%/firefox/geolocation/");
 // Name of the about: page contributed by safebrowsing to handle display of error
 // pages on phishing/malware hits.  (bug 399233)
 pref("urlclassifier.alternate_error_page", "blocked");
 // The number of random entries to send with a gethash request.
 pref("urlclassifier.gethashnoise", 4);
 // If an urlclassifier table has not been updated in this number of seconds,
 // a gethash request will be forced to check that the result is still in
 // the database.
 pref("urlclassifier.max-complete-age", 2700);
 // Maximum size of the sqlite3 cache during an update, in bytes
 pref("urlclassifier.updatecachemax", 41943040);
 // URL for checking the reason for a malware warning.
 pref("browser.safebrowsing.malware.reportURL", "https://safebrowsing.google.com/safebrowsing/diagnostic?client=%NAME%&hl=%LOCALE%&site=");
 #endif
 // True if this is the first time we are showing about:firstrun
 pref("browser.firstrun.show.localepicker", false);
 // True if you always want dump() to work
 pref("javascript.options.showInConsole", true);
 pref("browser.dom.window.dump.enabled", true);
 // controls if we want camera support
 pref("device.camera.enabled", true);
 pref("media.realtime_decoder.enabled", true);
 // Metro manages state by autodetection
 pref("network.manage-offline-status", true);
 // Enable HTML fullscreen API in content.
 pref("full-screen-api.enabled", true);
 // But don't require approval when content enters fullscreen; we'll keep our
 // UI/chrome visible still, so there's no need to approve entering fullscreen.
 pref("full-screen-api.approval-required", false);
 // Don't allow fullscreen requests to percolate across content/chrome boundary,
 // so that our chrome/UI remains visible after content enters fullscreen.
 pref("full-screen-api.content-only", true);
 // Don't make top-level widgets fullscreen. This only applies when running in
 // "metrodesktop" mode, not when running in full metro mode. This prevents the
 // window from changing size when we go fullscreen; the content expands to fill
 // the window, the window size doesn't change. This pref has no effect when
 // running in actual Metro mode, as the widget will already be fullscreen then.
 pref("full-screen-api.ignore-widgets", true);
 // image visibility prefs.
 // image visibility tries to only keep images near the viewport decoded instead
 // of keeping all images decoded.
 pref("layout.imagevisibility.enabled", true);
 pref("layout.imagevisibility.numscrollportwidths", 1);
 pref("layout.imagevisibility.numscrollportheights", 1);
 // Don't enable <input type=color> yet as we don't have a color picker
 // implemented for Windows Metro (bug 895464)
 pref("dom.forms.color", false);