Impressum RecommendedPreferences.sys.mjs
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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/. */
import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
Log: "chrome://remote/content/shared/Log.sys.mjs",
});
XPCOMUtils.defineLazyPreferenceGetter(
lazy,
"useRecommendedPrefs",
"remote.prefs.recommended",
false
);
ChromeUtils.defineLazyGetter(lazy, "logger", () => lazy.Log.get());
// Ensure we are in the parent process.
if (Services.appinfo.processType != Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT) {
throw new Error(
"RecommendedPreferences should only be loaded in the parent process"
);
}
// ALL CHANGES TO THIS LIST MUST HAVE REVIEW FROM A WEBDRIVER PEER!
//
// Preferences are set for automation on startup, unless
// remote.prefs.recommended has been set to false.
//
// Note: Clients do not always use the latest version of the application. As
// such backward compatibility has to be ensured at least for the last three
// releases.
// INSTRUCTIONS TO ADD A NEW PREFERENCE
//
// Preferences for remote control and automation can be set from several entry
// points:
// - remote/shared/RecommendedPreferences.sys.mjs
// - remote/test/puppeteer/packages/browsers/src/browser-data/firefox.ts
// - testing/geckodriver/src/prefs.rs
// - testing/marionette/client/marionette_driver/geckoinstance.py
//
// The preferences in `firefox.ts`, `prefs.rs` and `geckoinstance.py`
// will be applied before the application starts, and should typically be used
// for preferences which cannot be updated during the lifetime of the application.
//
// The preferences in `RecommendedPreferences.sys.mjs` are applied after
// the application has started, which means that the application must apply this
// change dynamically and behave correctly. Note that you can also define
// protocol specific preferences (CDP, WebDriver, ...) which are merged with the
// COMMON_PREFERENCES from `RecommendedPreferences.sys.mjs`.
//
// Additionally, users relying on the Marionette Python client (ie. using
// geckoinstance.py) set `remote.prefs.recommended = false`. This means that
// preferences from `RecommendedPreferences.sys.mjs` are not applied and have to
// be added to the list of preferences in that Python file. Note that there are
// several lists of preferences, either common or specific to a given application
// (Firefox Desktop, Fennec, Thunderbird).
//
// Depending on how users interact with the Remote Agent, they will use different
// combinations of preferences. So it's important to update the preferences files
// so that all users have the proper preferences.
//
// When adding a new preference, follow this guide to decide where to add it:
// - Add the preference to `geckoinstance.py`
// - If the preference has to be set before startup:
// - Add the preference to `prefs.rs`
// - Add the preference `browser-data/firefox.ts` in the puppeteer folder
// - Create a PR to upstream the change on `browser-data/firefox.ts` to puppeteer
// - Otherwise, if the preference can be set after startup:
// - Add the preference to `RecommendedPreferences.sys.mjs`
const COMMON_PREFERENCES = new Map([
// Make sure Shield doesn't hit the network.
["app.normandy.api_url", ""],
// Disable automatically upgrading Firefox
//
// Note: This preference should have already been set by the client when
// creating the profile. But if not and to absolutely make sure that updates
// of Firefox aren't downloaded and applied, enforce its presence.
["app.update.disabledForTesting", true],
// Increase the APZ content response timeout in tests to 1 minute.
// This is to accommodate the fact that test environments tends to be
// slower than production environments (with the b2g emulator being
// the slowest of them all), resulting in the production timeout value
// sometimes being exceeded and causing false-positive test failures.
//
// (bug 1176798, bug 1177018, bug 1210465)
["apz.content_response_timeout", 60000],
// Don't show the content blocking introduction panel.
// We use a larger number than the default 22 to have some buffer
// This can be removed once Firefox 69 and 68 ESR and are no longer supported.
["browser.contentblocking.introCount", 99],
// Indicate that the download panel has been shown once so that
// whichever download test runs first doesn't show the popup
// inconsistently.
["browser.download.panel.shown", true],
// Make sure newtab weather doesn't hit the network to retrieve weather data.
[
"browser.newtabpage.activity-stream.discoverystream.region-weather-config",
"",
],
// Make sure newtab wallpapers don't hit the network to retrieve wallpaper data.
["browser.newtabpage.activity-stream.newtabWallpapers.enabled", false],
["browser.newtabpage.activity-stream.newtabWallpapers.v2.enabled", false],
// Make sure Topsites doesn't hit the network to retrieve sponsored tiles.
["browser.newtabpage.activity-stream.showSponsoredTopSites", false],
// Always display a blank page
["browser.newtabpage.enabled", false],
// Background thumbnails in particular cause grief, and disabling
// thumbnails in general cannot hurt
["browser.pagethumbnails.capturing_disabled", true],
// Disable geolocation ping(#1)
["browser.region.network.url", ""],
// Disable safebrowsing components.
//
// These should also be set in the profile prior to starting Firefox,
// as it is picked up at runtime.
["browser.safebrowsing.blockedURIs.enabled", false],
["browser.safebrowsing.downloads.enabled", false],
["browser.safebrowsing.malware.enabled", false],
["browser.safebrowsing.phishing.enabled", false],
// Disable updates to search engines.
//
// Should be set in profile.
["browser.search.update", false],
// Do not restore the last open set of tabs if the browser has crashed
["browser.sessionstore.resume_from_crash", false],
// Don't check for the default web browser during startup.
//
// These should also be set in the profile prior to starting Firefox,
// as it is picked up at runtime.
["browser.shell.checkDefaultBrowser", false],
// Disable session restore infobar
["browser.startup.couldRestoreSession.count", -1],
// Do not redirect user when a milstone upgrade of Firefox is detected
["browser.startup.homepage_override.mstone", "ignore"],
// Unload the previously selected tab immediately
["browser.tabs.remote.unloadDelayMs", 0],
// Don't unload tabs when available memory is running low
["browser.tabs.unloadOnLowMemory", false],
// Do not warn when closing all open tabs
["browser.tabs.warnOnClose", false],
// Do not warn when closing all other open tabs
["browser.tabs.warnOnCloseOtherTabs", false],
// Do not warn when multiple tabs will be opened
["browser.tabs.warnOnOpen", false],
// Don't show the Bookmarks Toolbar on any tab (the above pref that
// disables the New Tab Page ends up showing the toolbar on about:blank).
["browser.toolbars.bookmarks.visibility", "never"],
// Make sure Topsites doesn't hit the network to retrieve tiles from Contile.
["browser.topsites.contile.enabled", false],
// Disable first run splash page on Windows 10
["browser.usedOnWindows10.introURL", ""],
// Turn off Merino suggestions in the location bar so as not to trigger
// network connections.
["browser.urlbar.merino.endpointURL", ""],
// Turn off search suggestions in the location bar so as not to trigger
// network connections.
["browser.urlbar.suggest.searches", false],
// Do not warn on quitting Firefox
["browser.warnOnQuit", false],
// Do not show datareporting policy notifications which can
// interfere with tests
[
"datareporting.healthreport.documentServerURI",
"http://%(server)s/dummy/healthreport/",
],
["datareporting.healthreport.logging.consoleEnabled", false],
["datareporting.healthreport.service.enabled", false],
["datareporting.healthreport.service.firstRun", false],
["datareporting.healthreport.uploadEnabled", false],
["datareporting.policy.dataSubmissionEnabled", false],
["datareporting.policy.dataSubmissionPolicyAccepted", false],
["datareporting.policy.dataSubmissionPolicyBypassNotification", true],
// Disable popup-blocker
["dom.disable_open_during_load", false],
// Enabling the support for File object creation in the content process
["dom.file.createInChild", true],
// Disable delayed user input event handling
["dom.input_events.security.minNumTicks", 0],
["dom.input_events.security.minTimeElapsedInMS", 0],
// Disable the ProcessHangMonitor
["dom.ipc.reportProcessHangs", false],
// Disable slow script dialogues
["dom.max_chrome_script_run_time", 0],
["dom.max_script_run_time", 0],
// Disable location change rate limitation
["dom.navigation.navigationRateLimit.count", 0],
// DOM Push
["dom.push.connection.enabled", false],
// Screen Orientation API
["dom.screenorientation.allow-lock", true],
// Disable dialog abuse if alerts are triggered too quickly.
["dom.successive_dialog_time_limit", 0],
// Only load extensions from the application and user profile
// AddonManager.SCOPE_PROFILE + AddonManager.SCOPE_APPLICATION
//
// Should be set in profile.
["extensions.autoDisableScopes", 0],
["extensions.enabledScopes", 5],
// Disable metadata caching for installed add-ons by default
["extensions.getAddons.cache.enabled", false],
// Disable installing any distribution extensions or add-ons.
// Should be set in profile.
["extensions.installDistroAddons", false],
// Turn off extension updates so they do not bother tests
["extensions.update.enabled", false],
["extensions.update.notifyUser", false],
// Make sure opening about:addons will not hit the network
["extensions.getAddons.discovery.api_url", "data:, "],
// Redirect various extension update URLs
[
"extensions.blocklist.detailsURL",
"http://%(server)s/extensions-dummy/blocklistDetailsURL",
],
[
"extensions.blocklist.itemURL",
"http://%(server)s/extensions-dummy/blocklistItemURL",
],
["extensions.hotfix.url", "http://%(server)s/extensions-dummy/hotfixURL"],
["extensions.systemAddon.update.enabled", false],
[
"extensions.update.background.url",
"http://%(server)s/extensions-dummy/updateBackgroundURL",
],
["extensions.update.url", "http://%(server)s/extensions-dummy/updateURL"],
// Make sure opening about: addons won't hit the network
["extensions.getAddons.discovery.api_url", "data:, "],
[
"extensions.getAddons.get.url",
"http://%(server)s/extensions-dummy/repositoryGetURL",
],
[
"extensions.getAddons.search.browseURL",
"http://%(server)s/extensions-dummy/repositoryBrowseURL",
],
// Allow the application to have focus even it runs in the background
["focusmanager.testmode", true],
// Disable useragent updates
["general.useragent.updates.enabled", false],
// Disable geolocation ping(#2)
["geo.provider.network.url", ""],
// Always use network provider for geolocation tests so we bypass the
// macOS dialog raised by the corelocation provider
["geo.provider.testing", true],
// Do not scan Wifi
["geo.wifi.scan", false],
// Disable Firefox accounts ping
["identity.fxaccounts.auth.uri", "https://{server}/dummy/fxa"],
// Disable connectivity service pings
["network.connectivity-service.enabled", false],
// Do not prompt with long usernames or passwords in URLs
["network.http.phishy-userpass-length", 255],
// Do not prompt for temporary redirects
["network.http.prompt-temp-redirect", false],
// Do not automatically switch between offline and online
["network.manage-offline-status", false],
// Make sure SNTP requests do not hit the network
["network.sntp.pools", "%(server)s"],
// Privacy and Tracking Protection
["privacy.trackingprotection.enabled", false],
// Used to check if recommended preferences are applied
["remote.prefs.recommended.applied", true],
// Don't do network connections for mitm priming
["security.certerrors.mitm.priming.enabled", false],
// Local documents have access to all other local documents,
// including directory listings
["security.fileuri.strict_origin_policy", false],
// Tests do not wait for the notification button security delay
["security.notification_enable_delay", 0],
// Do not download intermediate certificates
["security.remote_settings.intermediates.enabled", false],
// Disable logging for remote settings
["services.settings.loglevel", "off"],
// Ensure remote settings do not hit the network
["services.settings.server", "data:,#remote-settings-dummy/v1"],
// Do not automatically fill sign-in forms with known usernames and
// passwords
["signon.autofillForms", false],
// Disable password capture, so that tests that include forms are not
// influenced by the presence of the persistent doorhanger notification
["signon.rememberSignons", false],
// Disable first-run welcome page
["startup.homepage_welcome_url", "about:blank"],
["startup.homepage_welcome_url.additional", ""],
// Prevent starting into safe mode after application crashes
["toolkit.startup.max_resumed_crashes", -1],
// Disable all telemetry pings
["toolkit.telemetry.server", "https://%(server)s/telemetry-dummy/"],
// Disable window occlusion on Windows, which can prevent webdriver commands
// such as WebDriver:FindElements from working properly (Bug 1802473).
["widget.windows.window_occlusion_tracking.enabled", false],
]);
export const RecommendedPreferences = {
alteredPrefs: new Set(),
isInitialized: false,
/**
* Apply the provided map of preferences.
*
* Note, that they will be automatically reset on application shutdown.
*
* @param {Map<string, object>=} preferences
* Map of preference name to preference value.
*/
applyPreferences(preferences = new Map()) {
if (!lazy.useRecommendedPrefs) {
// If remote.prefs.recommended is set to false, do not set any preference
// here. Needed for our Firefox CI.
return;
}
// Only apply common recommended preferences on first call to
// applyPreferences.
if (!this.isInitialized) {
// Merge common preferences and optionally provided preferences in a
// single map. Hereby the extra preferences have higher priority.
preferences = new Map([...COMMON_PREFERENCES, ...preferences]);
Services.obs.addObserver(this, "quit-application");
this.isInitialized = true;
}
for (const [k, v] of preferences) {
if (!Services.prefs.prefHasUserValue(k)) {
lazy.logger.debug(`Setting recommended pref ${k} to ${v}`);
switch (typeof v) {
case "string":
Services.prefs.setStringPref(k, v);
break;
case "boolean":
Services.prefs.setBoolPref(k, v);
break;
case "number":
Services.prefs.setIntPref(k, v);
break;
default:
throw new TypeError(`Invalid preference type: ${typeof v}`);
}
// Keep track all the altered preferences to restore them on
// quit-application.
this.alteredPrefs.add(k);
}
}
},
observe(subject, topic) {
if (topic === "quit-application") {
Services.obs.removeObserver(this, "quit-application");
this.restoreAllPreferences();
}
},
/**
* Restore all the altered preferences.
*/
restoreAllPreferences() {
this.restorePreferences(this.alteredPrefs);
this.isInitialized = false;
},
/**
* Restore provided preferences.
*
* @param {Map} preferences
* Map of preferences that should be restored.
*/
restorePreferences(preferences) {
for (const k of preferences.keys()) {
lazy.logger.debug(`Resetting recommended pref ${k}`);
Services.prefs.clearUserPref(k);
this.alteredPrefs.delete(k);
}
},
};
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2026-03-28
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