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base.cfg
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base.cfg
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// Base Phoenix Mozilla.cfg :p
// The Phoenix shall rise from the ashes of what fell before it.
defaultPref("browser.aboutConfig.showWarning", false);
defaultPref("general.warnOnAboutConfig", false);
// 001 DATA COLLECTION
// A lot of defense in depth...
/// Shield Studies/Normandy
// We also set "DisableFirefoxStudies" in policies
// https://mozilla.github.io/policy-templates/#disablefirefoxstudies
// https://mozilla.github.io/normandy/
// https://wiki.mozilla.org/Firefox/Shield/Shield_Studies
// https://support.mozilla.org/kb/shield
// https://support.mozilla.org/kb/how-stop-firefox-making-automatic-connections#w_experiments-or-studies
// https://wiki.mozilla.org/Advocacy/heartbeat
lockPref("app.normandy.api_url", "");
lockPref("app.normandy.enabled", false);
lockPref("app.normandy.first_run", false);
lockPref("app.normandy.user_id", "");
lockPref("app.shield.optoutstudies.enabled", false);
lockPref("messaging-system.rsexperimentloader.enabled", false);
lockPref("messaging-system.rsexperimentloader.collection_id", "");
lockPref("toolkit.telemetry.pioneer-new-studies-available", false);
/// WebVTT Testing Events
// https://searchfox.org/mozilla-central/source/modules/libpref/init/StaticPrefList.yaml
lockPref("media.webvtt.testing.events", false);
/// Origin Trials
// https://wiki.mozilla.org/Origin_Trials
lockPref("dom.origin-trials.enabled", false);
/// Crash Reporting
// https://github.com/mozilla-services/socorro
// https://wiki.mozilla.org/Socorro
// https://firefox-source-docs.mozilla.org/tools/sanitizer/asan_nightly.html
lockPref("asanreporter.apiurl", "");
lockPref("asanreporter.clientid", "");
lockPref("breakpad.reportURL", "");
lockPref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [DEFAULT]
lockPref("browser.crashReports.unsubmittedCheck.enabled", false); // [DEFAULT]
lockPref("browser.tabs.crashReporting.includeURL", false); // Defense in depth
lockPref("browser.tabs.crashReporting.sendReport", false);
lockPref("toolkit.crashreporter.include_context_heap", false); // Defense in depth
/// X-Frame Options Error Reporting
// https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/data/xfocsp-error-report-ping.html
lockPref("security.xfocsp.errorReporting.automatic", false); // [DEFAULT]
lockPref("security.xfocsp.errorReporting.enabled", false);
/// Coverage
// https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/
lockPref("toolkit.coverage.enabled", false);
lockPref("toolkit.coverage.endpoint.base", "");
lockPref("toolkit.coverage.opt-out", true); // [HIDDEN]
lockPref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN]
/// Default Browser Agent
/// We also configure "DisableDefaultBrowserAgent" in policies
// https://mozilla.github.io/policy-templates/#disabledefaultbrowseragent
// https://firefox-source-docs.mozilla.org/toolkit/mozapps/defaultagent/default-browser-agent/index.html
lockPref("default-browser-agent.enabled", false);
/// Misc. Telemetry
/// We also configure "DisableTelemetry" & "ImproveSuggest" in policies
// https://mozilla.github.io/policy-templates/#disabletelemetry
// https://mozilla.github.io/policy-templates/#firefoxsuggest
// https://searchfox.org/mozilla-central/source/testing/geckodriver/src/prefs.rs
// https://wiki.mozilla.org/QA/Telemetry
// https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/internals/preferences.html
// https://searchfox.org/mozilla-central/source/modules/libpref/init/StaticPrefList.yaml
// https://searchfox.org/mozilla-central/source/remote/shared/RecommendedPreferences.sys.mjs
// https://searchfox.org/mozilla-central/source/testing/profiles/perf/user.js
lockPref("browser.newtabpage.activity-stream.feeds.telemetry", false);
lockPref("browser.newtabpage.activity-stream.impressionId", "");
lockPref("browser.newtabpage.activity-stream.telemetry", false);
lockPref("browser.newtabpage.activity-stream.telemetry.structuredIngestion.endpoint", "");
lockPref("browser.newtabpage.activity-stream.telemetry.ut.events", false);
lockPref("browser.places.interactions.enabled", false); // https://searchfox.org/mozilla-central/source/browser/app/profile/firefox.js
lockPref("browser.privacySegmentation.preferences.show", false);
lockPref("browser.rights.3.shown", true);
lockPref("browser.search.serpEventTelemetryCategorization.enabled", false);
lockPref("browser.search.serpMetricsRecordedCounter", 0);
lockPref("browser.urlbar.quicksuggest.dataCollection.enabled", false);
lockPref("datareporting.healthreport.documentServerURI", ""); // [HIDDEN]
lockPref("datareporting.healthreport.logging.consoleEnabled", false); // [HIDDEN]
lockPref("datareporting.healthreport.service.enabled", false); // [HIDDEN]
lockPref("datareporting.healthreport.service.firstRun", false); // [HIDDEN]
lockPref("datareporting.healthreport.uploadEnabled", false);
lockPref("datareporting.policy.dataSubmissionEnabled", false);
lockPref("datareporting.policy.dataSubmissionPolicyAccepted", false);
lockPref("datareporting.policy.dataSubmissionPolicyBypassNotification", true);
lockPref("datareporting.policy.firstRunURL", "");
lockPref("dom.ipc.processHangMonitor", false);
lockPref("dom.ipc.reportProcessHangs", false);
lockPref("dom.security.unexpected_system_load_telemetry_enabled", false);
lockPref("hangmonitor.timeout", 0);
lockPref("network.jar.record_failure_reason", false);
lockPref("network.traffic_analyzer.enabled", false);
lockPref("network.trr.confirmation_telemetry_enabled", false);
lockPref("identity.fxaccounts.telemetry.clientAssociationPing.enabled", false);
lockPref("identity.fxaccounts.account.telemetry.sanitized_uid", "");
lockPref("privacy.trackingprotection.emailtracking.data_collection.enabled", false);
lockPref("security.app_menu.recordEventTelemetry", false);
lockPref("security.certerrors.recordEventTelemetry", false);
lockPref("security.protectionspopup.recordEventTelemetry", false);
lockPref("toolkit.content-background-hang-monitor.disabled", true);
lockPref("toolkit.telemetry.archive.enabled", false);
lockPref("toolkit.telemetry.bhrPing.enabled", false);
lockPref("toolkit.telemetry.cachedClientID", "");
lockPref("toolkit.telemetry.dap.helper.hpke", "");
lockPref("toolkit.telemetry.dap.helper.url", "");
lockPref("toolkit.telemetry.dap.leader.hpke", "");
lockPref("toolkit.telemetry.dap.leader.url", "");
lockPref("toolkit.telemetry.dap_enabled", false);
lockPref("toolkit.telemetry.dap_helper", "");
lockPref("toolkit.telemetry.dap_helper_owner", "");
lockPref("toolkit.telemetry.dap_leader", "");
lockPref("toolkit.telemetry.dap_leader_owner", "");
lockPref("toolkit.telemetry.dap_task1_enabled", false);
lockPref("toolkit.telemetry.dap_task1_taskid", "");
lockPref("toolkit.telemetry.dap_visit_counting_enabled", false);
lockPref("toolkit.telemetry.dap_visit_counting_experiment_list", "[]");
lockPref("toolkit.telemetry.debugSlowSql", false);
lockPref("toolkit.telemetry.enabled", false);
lockPref("toolkit.telemetry.firstShutdownPing.enabled", false);
lockPref("toolkit.telemetry.geckoview.streaming", false); // [Android specific?]
lockPref("toolkit.telemetry.healthping.enabled", false); // [HIDDEN]
lockPref("toolkit.telemetry.newProfilePing.enabled", false);
lockPref("toolkit.telemetry.pioneerId", ""); // [HIDDEN]
lockPref("toolkit.telemetry.previousBuildID", "");
lockPref("toolkit.telemetry.reportingpolicy.firstRun", false);
lockPref("toolkit.telemetry.server", "data;");
lockPref("toolkit.telemetry.server_owner", "");
lockPref("toolkit.telemetry.shutdownPingSender.enabled", false);
lockPref("toolkit.telemetry.shutdownPingSender.enabledFirstSession", false);
lockPref("toolkit.telemetry.shutdownPingSender.backgroundtask.enabled", false);
lockPref("toolkit.telemetry.testing.suppressPingsender", true);
lockPref("toolkit.telemetry.unified", false);
lockPref("toolkit.telemetry.updatePing.enabled", false);
lockPref("toolkit.telemetry.user_characteristics_ping.opt-out", true);
lockPref("toolkit.telemetry.user_characteristics_ping.send-once", false); // [DEFAULT]
lockPref("toolkit.telemetry.user_characteristics_ping.uuid", "");
/// Misc. UX - Harmless but does not apply to us
lockPref("app.normandy.shieldLearnMoreUrl", "");
lockPref("datareporting.healthreport.infoURL", "");
lockPref("extensions.recommendations.privacyPolicyUrl", "");
lockPref("toolkit.crashreporter.infoURL", "");
lockPref("toolkit.datacollection.infoURL", "");
// 002 MOZILLA CRAP™
/// Firefox Recommendations & "Discovery"
// We also set "ExtensionRecommendations" & "FeatureRecommendations" in policies
// https://mozilla.github.io/policy-templates/#usermessaging
// https://support.mozilla.org/kb/recommendations-firefox
// https://support.mozilla.org/kb/personalized-extension-recommendations
lockPref("browser.dataFeatureRecommendations.enabled", false);
lockPref("browser.discovery.enabled", false);
lockPref("browser.discovery.sites", "");
lockPref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false);
lockPref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false);
lockPref("extensions.getAddons.browseAddons", ""); // Android
lockPref("extensions.getAddons.discovery.api_url", "data:;"); // https://searchfox.org/mozilla-central/source/testing/profiles/common/user.js
lockPref("extensions.getAddons.showPane", false);
lockPref("extensions.htmlaboutaddons.recommendations.enabled", false);
lockPref("extensions.recommendations.themeRecommendationUrl", "");
lockPref("extensions.webservice.discoverURL", "");
/// Fakespot
lockPref("browser.shopping.experience2023.ads.enabled", false);
lockPref("browser.shopping.experience2023.ads.exposure", false);
lockPref("browser.shopping.experience2023.ads.userEnabled", false);
lockPref("browser.shopping.experience2023.active", false);
lockPref("browser.shopping.experience2023.autoOpen.enabled", false);
lockPref("browser.shopping.experience2023.autoOpen.userEnabled", false);
lockPref("browser.shopping.experience2023.enabled", false);
lockPref("browser.shopping.experience2023.optedIn", 2);
lockPref("browser.shopping.experience2023.survey.enabled", false);
lockPref("browser.urlbar.fakespot.featureGate", false);
lockPref("browser.urlbar.suggest.fakespot", false);
lockPref("toolkit.shopping.ohttpConfigURL", "");
lockPref("toolkit.shopping.ohttpRelayURL", "");
/// Pocket
// We also set "DisablePocket", "Pocket", & "SponsoredPocket" in policies
// https://mozilla.github.io/policy-templates/#disablepocket
// https://mozilla.github.io/policy-templates/#firefoxhome
lockPref("browser.newtabpage.activity-stream.discoverystream.pocket-feed-parameters", "");
lockPref("browser.newtabpage.activity-stream.discoverystream.saveToPocketCard.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.sendToPocket.enabled", false);
lockPref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
lockPref("browser.newtabpage.activity-stream.section.topstories.rows", 0);
lockPref("browser.urlbar.pocket.featureGate", false);
lockPref("browser.urlbar.suggest.pocket", false);
lockPref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);
lockPref("extensions.pocket.api", "");
lockPref("extensions.pocket.bffApi", "");
lockPref("extensions.pocket.bffRecentSaves", false);
lockPref("extensions.pocket.enabled", false);
lockPref("extensions.pocket.oAuthConsumerKey", "");
lockPref("extensions.pocket.oAuthConsumerKeyBff", "");
lockPref("extensions.pocket.refresh.emailButton.enabled", false);
lockPref("extensions.pocket.refresh.hideRecentSaves.enabled", true);
lockPref("extensions.pocket.showHome", false);
lockPref("extensions.pocket.site", "");
/// Firefox Relay
lockPref("signon.firefoxRelay.base_url", "");
lockPref("signon.firefoxRelay.feature", "disabled");
lockPref("signon.firefoxRelay.learn_more_url", "");
lockPref("signon.firefoxRelay.manage_url", "");
lockPref("signon.firefoxRelay.privacy_policy_url", "");
lockPref("signon.firefoxRelay.terms_of_service_url", "");
/// "Interest-based Content Relevance Ranking"
// https://bugzilla.mozilla.org/show_bug.cgi?id=1886207
lockPref("toolkit.contentRelevancy.enabled", false);
lockPref("toolkit.contentRelevancy.ingestEnabled", false);
lockPref("toolkit.contentRelevancy.log", false);
/// "Top Sites"
// We also set "SponsoredTopSites" in policies
// https://mozilla.github.io/policy-templates/#firefoxhome
defaultPref("browser.newtabpage.activity-stream.default.sites", "");
lockPref("browser.newtabpage.activity-stream.discoverystream.spocTopsitesPlacement.enabled", false);
lockPref("browser.newtabpage.activity-stream.showSponsoredTopSites", false);
lockPref("browser.newtabpage.activity-stream.improvesearch.noDefaultSearchTile", true); // [DEFAULT]
lockPref("browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts", false);
lockPref("browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts.havePinned", "");
lockPref("browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts.searchEngines", "");
defaultPref("browser.newtabpage.pinned", "");
lockPref("browser.partnerlink.attributionURL", "");
lockPref("browser.partnerlink.campaign.topsites", "");
lockPref("browser.topsites.component.enabled", false);
lockPref("browser.topsites.contile.cachedTiles", "");
lockPref("browser.topsites.contile.enabled", false); // Make sure still active
lockPref("browser.topsites.contile.endpoint", "");
lockPref("browser.topsites.useRemoteSetting", false);
lockPref("browser.urlbar.sponsoredTopSites", false);
/// Misc. Activity Stream (about:home)
// We also configure "FirefoxHome" in policies
// https://mozilla.github.io/policy-templates/#firefoxhome
// https://searchfox.org/mozilla-central/source/testing/geckodriver/src/prefs.rs
lockPref("browser.newtabpage.activity-stream.asrouter.providers.cfr", "null");
lockPref("browser.newtabpage.activity-stream.asrouter.providers.cfr-fxa", "null");
lockPref("browser.newtabpage.activity-stream.asrouter.providers.message-groups", "null");
lockPref("browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments", "null");
lockPref("browser.newtabpage.activity-stream.asrouter.providers.onboarding", "null");
lockPref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "null");
lockPref("browser.newtabpage.activity-stream.asrouter.useRemoteL10n", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.config", "[]");
lockPref("browser.newtabpage.activity-stream.discoverystream.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.endpoints", "");
lockPref("browser.newtabpage.activity-stream.discoverystream.endpointSpocsClear", "");
lockPref("browser.newtabpage.activity-stream.discoverystream.essentialReadsHeader.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.newSponsoredLabel.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.onboardingExperience.dismissed", true);
lockPref("browser.newtabpage.activity-stream.discoverystream.onboardingExperience.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.personalization.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.recs.personalized", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.spocs.personalized", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.spocs-endpoint", "");
lockPref("browser.newtabpage.activity-stream.discoverystream.spocs-endpoint-query", "");
lockPref("browser.newtabpage.activity-stream.discoverystream.sponsored-collections.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.topicSelection.enabled", false);
lockPref("browser.newtabpage.activity-stream.feeds.discoverystreamfeed", false);
lockPref("browser.newtabpage.activity-stream.feeds.recommendationprovider", false);
lockPref("browser.newtabpage.activity-stream.feeds.section.topstories.options", "{\"hidden\":true}");
lockPref("browser.newtabpage.activity-stream.feeds.snippets", false);
lockPref("browser.newtabpage.activity-stream.showSponsored", false);
lockPref("browser.newtabpage.activity-stream.system.showSponsored", false);
lockPref("browser.newtabpage.activity-stream.tippyTop.service.endpoint", "");
lockPref("browser.newtabpage.activity-stream.unifiedAds.enabled", false);
lockPref("browser.newtabpage.activity-stream.unifiedAds.endpoint", "");
lockPref("messaging-system.askForFeedback", false);
/// Firefox Suggest
// We also configure "FirefoxSuggest" & "UrlbarInterventions" in policies
// https://mozilla.github.io/policy-templates/#firefoxsuggest
// https://mozilla.github.io/policy-templates/#usermessaging
// https://mozilla-services.github.io/merino/firefox.html
// https://github.com/mozilla-services/merino-py
lockPref("browser.newtabpage.activity-stream.discoverystream.merino-feed-experiment", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.merino-provider.enabled", false);
lockPref("browser.newtabpage.activity-stream.discoverystream.merino-provider.endpoint", "");
lockPref("browser.urlbar.addons.featureGate", false);
lockPref("browser.urlbar.groupLabels.enabled", false);
lockPref("browser.urlbar.mdn.featureGate", false);
lockPref("browser.urlbar.merino.endpointURL", "");
lockPref("browser.urlbar.merino.providers", "");
lockPref("browser.urlbar.quicksuggest.contextualOptIn", false);
lockPref("browser.urlbar.quicksuggest.enabled", false);
lockPref("browser.urlbar.quicksuggest.scenario", "offline");
lockPref("browser.urlbar.quicksuggest.shouldShowOnboardingDialog", false);
lockPref("browser.urlbar.quicksuggest.sponsoredIndex", 0);
lockPref("browser.urlbar.suggest.addons", false);
lockPref("browser.urlbar.suggest.mdn", false);
lockPref("browser.urlbar.suggest.quicksuggest.nonsponsored", false);
lockPref("browser.urlbar.suggest.quicksuggest.sponsored", false);
lockPref("browser.urlbar.suggest.trending", false);
lockPref("browser.urlbar.suggest.weather", false);
lockPref("browser.urlbar.suggest.yelp", false);
lockPref("browser.urlbar.trending.featureGate", false);
lockPref("browser.urlbar.weather.featureGate", false);
lockPref("browser.urlbar.yelp.featureGate", false);
/// Web Notifications
/// I have yet to see a legitimate use-case for websites using push notifications... but I have very commonly seen it abused for malicious purposes & spam
/// We also set "Notifications" in policies
// https://mozilla.github.io/policy-templates/#permissions
// https://mozilla-push-service.readthedocs.io/en/latest/
// https://mozilla-services.github.io/autopush-rs/
lockPref("dom.push.enabled", true); // [DEFAULT] - Fingerprintable & unnecessary with other prefs
defaultPref("permissions.default.desktop-notification", 2);
/// Misc. Promotions
// We also set "MoreFromMozilla" in policies
// https://mozilla.github.io/policy-templates/#usermessaging
lockPref("browser.contentblocking.report.hide_vpn_banner", true);
lockPref("browser.contentblocking.report.proxy.enabled", false);
lockPref("browser.contentblocking.report.proxy_extension.url", "");
lockPref("browser.contentblocking.report.show_mobile_app", false);
lockPref("browser.contentblocking.report.vpn_sub_id", "");
lockPref("browser.contentblocking.report.vpn.url", "");
lockPref("browser.contentblocking.report.vpn-android.url", "");
lockPref("browser.contentblocking.report.vpn-ios.url", "");
lockPref("browser.contentblocking.report.vpn-promo.url", "");
lockPref("browser.newtabpage.activity-stream.newtabWallpapers.highlightDismissed", true);
lockPref("browser.newtabpage.activity-stream.newtabWallpapers.highlightEnabled", false);
lockPref("browser.preferences.moreFromMozilla", false);
lockPref("browser.privatebrowsing.vpnpromourl", "");
lockPref("browser.promo.cookiebanners.enabled", false);
lockPref("browser.promo.focus.enabled", false);
lockPref("browser.promo.pin.enabled", false);
lockPref("browser.protections_panel.infoMessage.seen", true); // Disables ETP Banner
lockPref("browser.vpn_promo.enabled", false);
lockPref("cookiebanners.ui.desktop.showCallout", false);
lockPref("identity.fxaccounts.toolbar.pxiToolbarEnabled", false);
lockPref("identity.fxaccounts.toolbar.pxiToolbarEnabled.monitorEnabled", false);
lockPref("identity.fxaccounts.toolbar.pxiToolbarEnabled.relayEnabled", false);
lockPref("identity.fxaccounts.toolbar.pxiToolbarEnabled.vpnEnabled", false);
lockPref("identity.mobilepromo.android", "");
lockPref("identity.mobilepromo.ios", "");
lockPref("identity.sendtabpromo.url", "");
/// Kill about:welcome & Onboarding
/// We also set "OverrideFirstRunPage", "OverridePostUpdatePage", & "SkipOnboarding" in policies
// https://mozilla.github.io/policy-templates/#overridefirstrunpage
// https://mozilla.github.io/policy-templates/#overridepostupdatepage
// https://mozilla.github.io/policy-templates/#usermessaging
lockPref("browser.aboutwelcome.enabled", false);
lockPref("browser.aboutwelcome.screens", "");
lockPref("browser.aboutwelcome.showModal", false);
lockPref("browser.EULA.override", true); // https://searchfox.org/mozilla-central/source/testing/profiles/perf/user.js
lockPref("browser.migrate.content-modal.about-welcome-behavior", "autoclose");
lockPref("browser.startup.homepage_override.mstone", "ignore");
lockPref("browser.suppress_first_window_animation", true);
lockPref("browser.usedOnWindows10.introURL", ""); // https://searchfox.org/mozilla-central/source/remote/shared/RecommendedPreferences.sys.mjs
lockPref("startup.homepage_override_url", "");
lockPref("startup.homepage_override_url_nimbus", "");
lockPref("startup.homepage_welcome_url", "");
lockPref("startup.homepage_welcome_url.additional", "");
/// Kill UI Tour & Misc. "Feature Tours"
lockPref("browser.firefox-view.feature-tour", "{\"screen\":\"\",\"complete\":true}");
lockPref("browser.firefox-view.view-count", 0); // Prevent logging # of times you use View
lockPref("browser.pdfjs.feature-tour", "{\"screen\":\"\",\"complete\":true}");
lockPref("browser.uitour.enabled", false);
lockPref("browser.uitour.requireSecure", true); // [DEFAULT]
lockPref("browser.uitour.surveyDuration", 0);
lockPref("browser.uitour.url", "");
/// Prevent Mozilla domains from having special privileges
// https://firefox-source-docs.mozilla.org/dom/ipc/process_model.html#privileged-mozilla-content
lockPref("browser.tabs.remote.separatePrivilegedMozillaWebContentProcess", false);
lockPref("browser.tabs.remote.separatedMozillaDomains", "");
lockPref("dom.ipc.processCount.privilegedmozilla", 0);
defaultPref("extensions.webextensions.restrictedDomains", "");
lockPref("permissions.manager.defaultsUrl", "");
lockPref("privacy.resistFingerprinting.block_mozAddonManager", true);
lockPref("svg.context-properties.content.allowed-domains", "");
lockPref("webchannel.allowObject.urlWhitelist", "");
/// Remove Mozilla URL tracking params
defaultPref("app.releaseNotesURL", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes");
defaultPref("app.releaseNotesURL.aboutDialog", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes");
defaultPref("app.releaseNotesURL.prompt", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes");
defaultPref("extensions.getAddons.search.browseURL", "https://addons.mozilla.org/%LOCALE%/firefox/search?q=%TERMS%");
/// Firefox View
defaultPref("browser.firefox-view.search.enabled", false);
defaultPref("browser.firefox-view.virtual-list.enabled", false);
defaultPref("browser.tabs.firefox-view-newIcon", false);
defaultPref("browser.tabs.firefox-view-next", false);
// 003 Search & URL Bar
/// Allow adding custom search engines in about:preferences#search
defaultPref("browser.urlbar.update2.engineAliasRefresh", true);
/// Never trim URLs
lockPref("browser.urlbar.trimHttps", false);
lockPref("browser.urlbar.trimURLs", false);
/// Allow using a different search engine in Private Windows vs. Normal Windows
defaultPref("browser.search.separatePrivateDefault.ui.enabled", true);
// Prompt to use Private Browsing
defaultPref("browser.search.separatePrivateDefault.urlbarResult.enabled", true);
// Remove Search Engine Placeholders
lockPref("browser.urlbar.placeholderName", "");
lockPref("browser.urlbar.placeholderName.private", "");
/// Always show Punycode - Helps prevent phishing & IDN Homograph Attacks
// https://wikipedia.org/wiki/IDN_homograph_attack
defaultPref("network.IDN_show_punycode", true);
/// Do not autofill/autocomplete URLs by default
defaultPref("browser.urlbar.autoFill", false);
// Always show URL instead of search terms
lockPref("browser.urlbar.showSearchTerms.enabled", false);
lockPref("browser.urlbar.showSearchTerms.featureGate", false);
/// Enforce that JavaScript URLS are excluded from results
lockPref("browser.urlbar.filter.javascript", true); // [DEFAULT]
/// Disable "Recent Searches" being suggested since we disable Search & Form History anyways
lockPref("browser.urlbar.recentsearches.featureGate", false);
lockPref("browser.urlbar.suggest.recentsearches", false);
// Nice to have
defaultPref("browser.urlbar.clipboard.featureGate", false);
defaultPref("browser.urlbar.suggest.bookmark", true);
defaultPref("browser.urlbar.suggest.calculator", true);
defaultPref("browser.urlbar.suggest.clipboard", false);
defaultPref("browser.urlbar.suggest.engines", false);
defaultPref("browser.urlbar.suggest.history", false);
defaultPref("browser.urlbar.suggest.openpage", true);
defaultPref("browser.urlbar.unitConversion.enabled", true);
// 004 Implicit Connections
/// Disable Network Prefetching
// We also set "NetworkPrediction" in policies
// https://mozilla.github.io/policy-templates/#networkprediction
// https://developer.mozilla.org/docs/Glossary/Prefetch
lockPref("browser.places.speculativeConnect.enabled", false);
lockPref("browser.urlbar.speculativeConnect.enabled", false);
lockPref("network.dns.disablePrefetch", true);
lockPref("network.dns.disablePrefetchFromHTTPS", true); // [DEFAULT]
lockPref("network.http.speculative-parallel-limit", 0);
lockPref("network.predictor.enable-hover-on-ssl", false); // [DEFAULT]
lockPref("network.predictor.enable-prefetch", false); // [DEFAULT]
lockPref("network.predictor.enabled", false);
lockPref("network.prefetch-next", false);
/// Disable Search Suggestions
/// We also set "SearchSuggestEnabled" in policies
// https://mozilla.github.io/policy-templates/#searchsuggestenabled
lockPref("browser.search.suggest.enabled", false);
lockPref("browser.search.suggest.enabled.private", false);
lockPref("browser.urlbar.showSearchSuggestionsFirst", false);
lockPref("browser.urlbar.suggest.searches", false);
/// Prevent leaking single word searches to DNS provider
/// We also set "GoToIntranetSiteForSingleWordEntryInAddressBar" in policies
// https://mozilla.github.io/policy-templates/#gotointranetsiteforsinglewordentryinaddressbar
lockPref("browser.fixup.dns_first_for_single_words", false); // [DEFAULT]
lockPref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0);
/// Prevent middle click on new tab button opening URLs or searches from clipboard
lockPref("browser.tabs.searchclipboardfor.middleclick", false);
// 005 HTTP(S) - Mixed Content & General Network Hardening
/// Enforce using HTTPS as much as possible
lockPref("dom.security.https_first", true);
lockPref("dom.security.https_first_pbm", true); // [DEFAULT]
lockPref("dom.security.https_first_schemeless", true);
lockPref("dom.security.https_only_mode", true);
lockPref("dom.security.https_only_mode.upgrade_local", true);
lockPref("dom.security.https_only_mode_pbm", true);
lockPref("security.mixed_content.block_active_content", true);
lockPref("security.mixed_content.block_display_content", true);
lockPref("security.mixed_content.upgrade_display_content", true);
lockPref("security.mixed_content.upgrade_display_content.audio", true); // [DEFAULT]
lockPref("security.mixed_content.upgrade_display_content.image", true); // [DEFAULT]
lockPref("security.mixed_content.upgrade_display_content.video", true); // [DEFAULT]
/// Show suggestions when an HTTPS page can not be found
defaultPref("dom.security.https_only_mode_error_page_user_suggestions", true);
/// Always warn on insecure webpages
lockPref("security.insecure_connection_text.enabled", true);
lockPref("security.insecure_connection_text.pbmode.enabled", true);
lockPref("security.ssl.treat_unsafe_negotiation_as_broken", true);
lockPref("security.warn_submit_secure_to_insecure", true); // Warn when submitting a form from HTTP to HTTPS
/// Show detailed information on insecure warning pages
defaultPref("browser.xul.error_pages.expert_bad_cert", true);
/// Disable TLS1.3 0-RTT (Not forward secret)
// https://github.com/tlswg/tls13-spec/issues/1001
lockPref("security.tls.enable_0rtt_data", false);
/// Enforce preloading intermediates
// https://wiki.mozilla.org/Security/CryptoEngineering/Intermediate_Preloading
lockPref("security.remote_settings.intermediates.enabled", true); // [DEFAULT]
/// Never downgrade to insecure TLS 1.0/1.1
lockPref("security.tls.insecure_fallback_hosts", ""); // [DEFAULT]
lockPref("security.tls.version.enable-deprecated", false); // [DEFAULT]
/// Enforce TLS 1.3 downgrade protection
// https://bugzilla.mozilla.org/show_bug.cgi?id=1576790
lockPref("security.tls.hello_downgrade_check", true); // [DEFAULT]
/// Only load secure websockets from HTTPS pages
lockPref("network.websocket.allowInsecureFromHTTPS", false); // [DEFAULT]
/// Enforce blocking additional ports
lockPref("network.security.ports.banned.override", ""); // [DEFAULT]
/// Enable Post Quantum Key Agreement (Kyber)
/// We also set "PostQuantumKeyAgreementEnabled" in policies
// https://mozilla.github.io/policy-templates/#postquantumkeyagreementenabled
lockPref("network.http.http3.enable_kyber", true);
lockPref("security.tls.enable_kyber", true);
/// Enforce MITM Detection
// https://bugzilla.mozilla.org/show_bug.cgi?id=1529643
lockPref("security.certerrors.mitm.priming.enabled", true); // [DEFAULT]
/// Disable Captive Portal & Connectivity Checks
// We also set "CaptivePortal" in policies
// https://support.mozilla.org/kb/how-stop-firefox-making-automatic-connections#w_network-detection
// https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy
lockPref("captivedetect.canonicalContent", "");
lockPref("captivedetect.canonicalURL", "");
lockPref("network.captive-portal-service.enabled", false);
lockPref("network.connectivity-service.DNSv4.domain", "");
lockPref("network.connectivity-service.DNSv6.domain", "");
lockPref("network.connectivity-service.enabled", false);
lockPref("network.connectivity-service.IPv4.url", "");
lockPref("network.connectivity-service.IPv6.url", "");
/// Proxy
// We also set "UseProxyForDNS" in policies
// https://mozilla.github.io/policy-templates/#proxy
lockPref("network.file.disable_unc_paths", true);
lockPref("network.gio.supported-protocols", "");
lockPref("network.proxy.socks_remote_dns", true);
lockPref("network.proxy.socks5_remote_dns", true);
// 006 DNS
/// We also set "DNSOverHTTPS" in policies
// https://mozilla.github.io/policy-templates/#dnsoverhttps
/// Disable Mozilla DoH Rollout
lockPref("doh-rollout.disable-heuristics", true);
lockPref("doh-rollout.enabled", false);
lockPref("doh-rollout.skipHeuristicsCheck", true);
lockPref("doh-rollout.uri", "");
lockPref("network.trr.default_provider_uri", "");
/// Enable DoH & Set to Quad9 by default
/// We also set "DNSOverHTTPS" in policies
// https://mozilla.github.io/policy-templates/#dnsoverhttps
defaultPref("network.trr.custom_uri", "https://dns.quad9.net/dns-query");
defaultPref("network.trr.mode", 3);
defaultPref("network.trr.uri", "https://dns.quad9.net/dns-query");
/// Improve list of built-in DoH Providers
defaultPref("doh-rollout.provider-list", '[{"UIName":"Quad9 - Real-time Malware Protection","uri":"https://dns.quad9.net/dns-query"}, {"UIName":"DNS0 (ZERO) - Hardened Real-time Malware Protection","uri":"https://zero.dns0.eu"}, {"UIName":"DNS0 - Real-time Malware Protection","uri":"https://dns0.eu"}, {"UIName":"Mullvad - Ad/Tracking/Limited Malware Protection","uri":"https://base.dns.mullvad.net/dns-query"}, {"UIName":"AdGuard (Public) - Ad/Tracking Protection","uri":"https://dns.adguard-dns.com/dns-query"}, {"UIName":"Mullvad - No Filtering","uri":"https://dns.mullvad.net/dns-query"}, {"UIName":"Wikimedia - No Filtering","uri":"https://wikimedia-dns.org/dns-query"}, {"UIName":"AdGuard (Public) - No Filtering","uri":"https://unfiltered.adguard-dns.com/dns-query"}, {"UIName":"DNS0 - Kids","uri":"https://kids.dns0.eu"}, {"UIName":"Mullvad - Family","uri":"https://family.dns.mullvad.net/dns-query"}, {"UIName":"AdGuard (Public) - Family Protection","uri":"https://family.adguard-dns.com/dns-query"}, {"UIName":"Mullvad - Ad/Tracking/Limited Malware/Social Media Protection","uri":"https://extended.dns.mullvad.net/dns-query"}, {"UIName":"Mullvad - Ad/Tracking/Limited Malware/Social Media/Adult/Gambling Protection","uri":"https://all.dns.mullvad.net/dns-query"}]');
/// Skip DoH Connectivity Checks
lockPref("network.connectivity-service.DNS_HTTPS.domain", "");
lockPref("network.trr.confirmationNS", "skip");
/// Never disable DoH from registry checks
// https://searchfox.org/mozilla-central/source/modules/libpref/init/StaticPrefList.yaml
lockPref("network.notify.checkForNRPT", false);
lockPref("network.notify.checkForProxies", false);
/// Enforce EncryptedClientHello
// We also set "DisableEncryptedClientHello" in policies
// https://mozilla.github.io/policy-templates/#disableencryptedclienthello
// https://blog.cloudflare.com/announcing-encrypted-client-hello
lockPref("network.dns.echconfig.enabled", true); // [DEFAULT]
lockPref("network.dns.http3_echconfig.enabled", true); // [DEFAULT]
/// Enable Native DNS HTTPS Lookups
defaultPref("network.dns.native_https_query", true);
// 007 CERTIFICATES
/// Enforce OCSP & Stapling
lockPref("security.OCSP.enabled", 1); // [DEFAULT]
lockPref("security.ssl.enable_ocsp_must_staple", true); // [DEFAULT]
lockPref("security.ssl.enable_ocsp_stapling", true); // [DEFAULT]
/// Hard-fail OCSP by default
// Personally have not ran into any issues from this in YEARS... & it provides a fairly significant security improvement
// Can reconsider if people start having issues
defaultPref("security.OCSP.require", true);
/// Enable CRLite & use where possible
lockPref("security.pki.crlite_mode", 2);
lockPref("security.remote_settings.crlite_filters.enabled", true);
/// Make exceptions for certificate errors session only
lockPref("security.certerrors.permanentOverride", false);
/// Enforce Strict Certificate Pinning
lockPref("security.cert_pinning.enforcement_level", 2);
// 008 DOWNLOADS
/// Always prompt before downloading files
/// We also set "PromptForDownloadLocation" in policies
// https://mozilla.github.io/policy-templates/#promptfordownloadlocation
lockPref("browser.download.always_ask_before_handling_new_types", true);
lockPref("browser.download.useDownloadDir", false);
// Always notify when downloading files
lockPref("browser.download.alwaysOpenPanel", true); // [DEFAULT]
// Enforce blocking insecure downloads
lockPref("dom.block_download_insecure", true); // [DEFAULT]
// 009 SAFE BROWSING
/// Prevent sending metadata of downloaded files to Google
// https://support.mozilla.org/kb/how-does-phishing-and-malware-protection-work#w_how-does-phishing-and-malware-protection-work-in-firefox
// https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
lockPref("browser.safebrowsing.downloads.remote.enabled", false);
lockPref("browser.safebrowsing.downloads.remote.url", "");
/// Enforce that no data is shared with Google
// https://bugzilla.mozilla.org/show_bug.cgi?id=1351147
lockPref("browser.safebrowsing.provider.google.dataSharing.enabled", false); // [DEFAULT] Android
lockPref("browser.safebrowsing.provider.google4.dataSharing.enabled", false); // [DEFAULT]
lockPref("browser.safebrowsing.provider.google4.dataSharingURL", "");
/// Show advanced details on pages blocked by Safe Browsing by default
defaultPref("browser.xul.error_pages.show_safe_browsing_details_on_load", true);
/// By default, when you report a Safe Browsing false positive, it sends the URL to both Mozilla & Google (NOT PROXIED), as well as your locale to Mozilla
// Ex. https://en-us.phish-error.mozilla.com/?url=example.org - Which redirects you directly to https://safebrowsing.google.com/safebrowsing/report_error/?tpl=mozilla&url=example.org
// We can improve privacy & speed by sending the domain *only* to Google & without sending your locale to anyone
// We could also potentially strip tpl=mozilla which tells Google the request is from Firefox - though it looks like there is a different page for Firefox users with a better privacy policy, so we will leave it for now
// Unclear whether 'MalwareMistake' is used, but we can set it anyways
defaultPref("browser.safebrowsing.provider.google.reportMalwareMistakeURL", "https://safebrowsing.google.com/safebrowsing/report_error/?tpl=mozilla&url=");
defaultPref("browser.safebrowsing.provider.google.reportPhishMistakeURL", "https://safebrowsing.google.com/safebrowsing/report_error/?tpl=mozilla&url=");
defaultPref("browser.safebrowsing.provider.google4.reportMalwareMistakeURL", "https://safebrowsing.google.com/safebrowsing/report_error/?tpl=mozilla&url=");
defaultPref("browser.safebrowsing.provider.google4.reportPhishMistakeURL", "https://safebrowsing.google.com/safebrowsing/report_error/?tpl=mozilla&url=");
//// Similar behavior also appears to happen when you report a URL to Safe Browsing
defaultPref("browser.safebrowsing.reportPhishURL", "https://safebrowsing.google.com/safebrowsing/report_phish/?tpl=mozilla&url=");
/// Unclear whether these are actually used or not, but looks like Firefox has some kind of functionality to view a "report" from Safe Browsing about the safety, history, & general status of a site
// By default, it unnecessarily redirects from ex. https://safebrowsing.google.com/safebrowsing/diagnostic?site=example.org to https://transparencyreport.google.com/safe-browsing/search?url=example.org
// We can skip the direct to improve speed
defaultPref("browser.safebrowsing.provider.google.reportURL", "https://transparencyreport.google.com/safe-browsing/search?url=");
defaultPref("browser.safebrowsing.provider.google4.reportURL", "https://transparencyreport.google.com/safe-browsing/search?url=");
// 010 GEOLOCATION
/// Prevent Wi-Fi Scanning
lockPref("browser.region.network.scan", false); // [DEFAULT]
lockPref("geo.wifi.scan", false);
/// Disable "Region Updates"
// https://firefox-source-docs.mozilla.org/toolkit/modules/toolkit_modules/Region.html
lockPref("browser.region.network.url", "");
lockPref("browser.region.update.enabled", false);
/// Deny websites geo permission by default
/// We also set "Location" in policies
// https://mozilla.github.io/policy-templates/#permissions
defaultPref("permissions.default.geo", 2);
/// Geo Provider
defaultPref("geo.provider.network.url", "https://beacondb.net/v1/geolocate"); // Enable experimental geolocation support for BeaconDB, better than nothing for Windows/Linux users
defaultPref("geo.provider.use_corelocation", true); // Enable Apple Location Services for macOS
defaultPref("geo.provider.use_geoclue", false); // Disable Geoclue for Linux distros (at least for now)
defaultPref("geo.provider.ms-windows-location", false); // Disable Microsoft Location Services for Windows users
/// Update info URL to ours so that users receive accurate information
defaultPref("browser.geolocation.warning.infoURL", "https://phoenix.celenity.dev/geo");
// 011 WEBRTC
defaultPref("media.peerconnection.ice.obfuscate_host_addresses", true);
defaultPref("media.peerconnection.ice.proxy_only_if_behind_proxy", true);
lockPref("privacy.webrtc.allowSilencingNotifications", true);
defaultPref("privacy.webrtc.globalMuteToggles", true);
lockPref("privacy.webrtc.hideGlobalIndicator", false);
lockPref("privacy.webrtc.sharedTabWarning", true);
/// Always sandbox Media Transport
// https://searchfox.org/mozilla-central/source/security/sandbox/common/SandboxSettings.cpp
lockPref("media.peerconnection.mtransport_process", true); // [DEFAULT]
// 012 DISK AVOIDANCE
/// Disable Search & Form History - Can be leaked to sites
// We also set "DisableFormHistory" in policies
// https://mozilla.github.io/policy-templates/#disableformhistory
// https://blog.mindedsecurity.com/2011/10/autocompleteagain.html
lockPref("browser.formfill.enable", false);
/// Disable caching, might reconsider since we clear cache on exit anyways
defaultPref("browser.cache.disk.enable", false);
defaultPref("browser.cache.disk_cache_ssl", false);
defaultPref("browser.cache.memory.enable", false);
defaultPref("browser.cache.memory.capacity", 0);
defaultPref("browser.privatebrowsing.forceMediaMemoryCache", true);
/// Prevent storing unnecessary extra session data
defaultPref("browser.sessionstore.privacy_level", 2);
/// Sanitize on exit
// We also configure "SanitizeOnShutdown" in policies
// https://mozilla.github.io/policy-templates/#sanitizeonshutdown-selective
lockPref("privacy.clearHistory.cache", true);
defaultPref("privacy.clearHistory.historyFormDataAndDownloads", true);
lockPref("privacy.clearSiteData.cache", true);
defaultPref("privacy.clearSiteData.historyFormDataAndDownloads", true);
lockPref("privacy.clearOnShutdown.cache", true);
defaultPref("privacy.clearOnShutdown.cookies", true);
defaultPref("privacy.clearOnShutdown.downloads", true);
lockPref("privacy.clearOnShutdown.formdata", true);
defaultPref("privacy.clearOnShutdown.history", true);
defaultPref("privacy.clearOnShutdown.offlineApps", true);
defaultPref("privacy.clearOnShutdown.sessions", true);
lockPref("privacy.clearOnShutdown_v2.cache", true);
defaultPref("privacy.clearOnShutdown_v2.cookiesAndStorage", true);
defaultPref("privacy.clearOnShutdown_v2.historyFormDataAndDownloads", true);
lockPref("privacy.cpd.cache", true);
lockPref("privacy.cpd.formdata", true);
lockPref("privacy.sanitize.sanitizeOnShutdown", true); // Allows selectively clearing data on shutdown
/// Set time range when manually clearing data to "everything" by default
defaultPref("privacy.sanitize.timeSpan", 0);
/// Prevent logging blocked domains in about:protections
defaultPref("browser.contentblocking.cfr-milestone.enabled", false);
defaultPref("browser.contentblocking.database.enabled", false);
/// Disable favicons in shortcuts, prevents .ico files from persisting even after deletion
defaultPref("browser.shell.shortcutFavicons", false);
/// Delete cached files from windows opened with external applications
/// We also set "StartDownloadsInTempDirectory" in policies
// https://mozilla.github.io/policy-templates/#startdownloadsintempdirectory
defaultPref("browser.download.start_downloads_in_tmp_dir", true);
defaultPref("browser.helperApps.deleteTempFileOnExit", true);
// Prevent exposing content in the window title for Private Browsing windows
// https://searchfox.org/mozilla-central/source/browser/app/profile/firefox.js
defaultPref("privacy.exposeContentTitleInWindow.pbm", false);
/// When a file is deleted in Firefox, also remove from session list & history
// https://searchfox.org/mozilla-central/source/browser/app/profile/firefox.js
defaultPref("browser.download.clearHistoryOnDelete", 2);
/// Adds a fire button in Private Browsing Windows to reset session
defaultPref("browser.privatebrowsing.resetPBM.enabled", true);
/// Prevent automatically starting Firefox & restoring session after reboot on Windows
lockPref("toolkit.winRegisterApplicationRestart", false);
/// Disable LaterRun - Tracks profile creation time & number of browser uses
// https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/41568
// https://bugzilla.mozilla.org/show_bug.cgi?id=1200639
lockPref("browser.laterrun.bookkeeping.profileCreationTime", 0);
lockPref("browser.laterrun.bookkeeping.sessionCount", 0);
lockPref("browser.laterrun.enabled", false);
/// Prevent coloring visited links
defaultPref("layout.css.visited_links_enabled", false);
/// Disable collecting & generating background thumbnails
defaultPref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN]
// 013 EXTENSIONS
// Only allow signed extensions
lockPref("extensions.langpacks.signatures.required", true);
lockPref("xpinstall.signatures.required", true); // {DEFAULT}
lockPref("xpinstall.whitelist.required", true); // {DEFAULT}
// Enforce Extension Blocklist
lockPref("extensions.blocklist.enabled", true); // [DEFAULT]
// Never bypass 3rd party extension install prompts
lockPref("extensions.postDownloadThirdPartyPrompt", false);
// Allow LocalCDN to work on quarantined domains
defaultPref("extensions.quarantineIgnoredByUser.{b86e4813-687a-43e6-ab65-0bde4ab75758}", true);
// Allow Mullvads extension to work on quarantined domains
defaultPref("extensions.quarantineIgnoredByUser.{d19a89b9-76c1-4a61-bcd4-49e8de916403}", true);
// 014 PDF.js
/// Disable JavaScript
lockPref("pdfjs.enableScripting", false);
/// Never allow documents to prevent copying text
/// We also set `EnablePermissions` in policies
// https://mozilla.github.io/policy-templates/#pdfjs
lockPref("pdfjs.enablePermissions", false); // [DEFAULT]
/// Prevent checking if default PDF viewer
// https://searchfox.org/mozilla-central/source/browser/app/profile/firefox.js
lockPref("browser.shell.checkDefaultPDF", false);
lockPref("browser.shell.checkDefaultPDF.silencedByUser", true);
/// Never open Microsoft Edge for PDFs
// https://searchfox.org/mozilla-central/source/modules/libpref/init/StaticPrefList.yaml
lockPref("browser.pdf.launchDefaultEdgeAsApp", false);
/// Open PDFs in browser where possible
defaultPref("browser.download.open_pdf_attachments_inline", true);
/// Show sidebar by default when viewing PDFs
defaultPref("pdfjs.sidebarViewOnLoad", 2);
// 015 FINGERPRINTING PROTECTION
/// Set US English as locale by default
defaultPref("intl.accept_languages", "en-US, en");
defaultPref("intl.locale.requested", "en-US");
defaultPref("privacy.spoof_english", 2);
/// Round window sizes
defaultPref("privacy.window.maxInnerHeight", 900);
defaultPref("privacy.window.maxInnerWidth", 1600);
/// Expose RFP letterboxing to users, but do not enable by default
defaultPref("privacy.resistFingerprinting.letterboxing", false); // [DEFAULT]
/// If RFP is enabled, always randomize canvas
lockPref("privacy.resistFingerprinting.randomDataOnCanvasExtract", true); // [DEFAULT]
/// Disable WebGPU
// https://browserleaks.com/webgpu
lockPref("dom.webgpu.enabled", false); // [DEFAULT]
/// Enforce that WebGL stays disabled if it is disabled
lockPref("webgl.disable-fail-if-major-performance-caveat", false);
/// Prevent using system colors
lockPref("browser.display.use_system_colors", false);
/// Enforce using standard cross-platform widget theme
lockPref("widget.non-native-theme.enabled", true); // [DEFAULT]
// 016 MISC. PRIVACY
/// Enable ETP Strict
lockPref("browser.contentblocking.category", "strict");
/// Enforce Do Not Track & Global Privacy Control
lockPref("privacy.donottrackheader.enabled", true);
lockPref("privacy.globalprivacycontrol.enabled", true);
lockPref("privacy.globalprivacycontrol.functionality.enabled", true);
lockPref("privacy.globalprivacycontrol.pbmode.enabled", true); // [DEFAULT]
/// Disable "Privacy-Preserving Attribution"
// https://support.mozilla.org/kb/privacy-preserving-attribution