/** LIBREWOLF SETTINGS * * please take the time to read and understand, but also to customize the settings to find your own setup. * the answers to the most common questions are at this link https://librewolf.net/docs/faq/ * * WARNING: please make sure the first line of this file is empty. this is a known bug. */ defaultPref("librewolf.cfg.version", "6.2"); /** INDEX * the file is organized in categories, and each one has a number of sections: * * PRIVACY [ISOLATION, SANITIZING, CACHE AND STORAGE, HISTORY AND SESSION RESTORE, QUERY STRIPPING] * NETWORKING [HTTPS, IPv6, REFERERS, WEBRTC, PROXY, DNS, PREFETCHING AND SPECULATIVE CONNECTIONS, OFFLINE] * FINGERPRINTING [RFP, WEBGL] * SECURITY [SITE ISOLATION, CERTIFICATES, TLS/SSL, PERMISSIONS, FONTS, SAFE BROWSING, OTHERS] * REGION [LOCATION, LANGUAGE] * BEHAVIOR [DRM, SEARCH AND URLBAR, DOWNLOADS, AUTOPLAY, POP-UPS AND WINDOWS, MOUSE] * EXTENSIONS [USER INSTALLED, SYSTEM, EXTENSION FIREWALL] * BUILT-IN FEATURES [UPDATER, SYNC, LOCKWISE, CONTAINERS, DEVTOOLS, OTHERS] * UI [BRANDING, HANDLERS, FIRST LAUNCH, NEW TAB PAGE, ABOUT, RECOMMENDED] * TELEMETRY * WINDOWS [UPDATES, OTHERS] */ /** [CATEGORY] PRIVACY */ /** [SECTION] ISOLATION * default to strict mode, which includes: * 1. dFPI for both normal and private windows * 2. strict blocking lists for trackers * 3. shims to avoid breakage caused by blocking lists * 4. stricter policies for xorigin referrers * 5. dFPI specific cookie cleaning mechanism * * the desired category must be set with pref() otherwise it won't stick. * the UI that allows to change mode manually is hidden. */ pref("browser.contentblocking.category", "strict"); defaultPref("network.cookie.cookieBehavior", 5); // enforce dFPI defaultPref("privacy.partition.serviceWorkers", true); // isolate service workers /** [SECTION] SANITIZING */ defaultPref("network.cookie.lifetimePolicy", 2); // keep cookies until end of the session, then clear // make third party and http cookies session-only defaultPref("network.cookie.thirdparty.sessionOnly", true); defaultPref("network.cookie.thirdparty.nonsecureSessionOnly", true); /** * this way of sanitizing cookies would override the exceptions set by the users and just delete everything, * we disable it but cookies and site data are still cleared per session unless exceptions are set. * all the cleaning prefs true by default except for siteSetting and offlineApps, which is what we want. */ defaultPref("privacy.clearOnShutdown.cookies", false); defaultPref("privacy.sanitize.sanitizeOnShutdown", true); defaultPref("privacy.sanitize.timeSpan", 0); /** [SECTION] CACHE AND STORAGE */ defaultPref("browser.cache.disk.enable", false); // disable disk cache /** prevent media cache from being written to disk in pb, but increase max cache size to avoid playback issues */ defaultPref("browser.privatebrowsing.forceMediaMemoryCache", true); defaultPref("media.memory_cache_max_size", 65536); // disable favicons in profile folder and page thumbnail capturing defaultPref("browser.shell.shortcutFavicons", false); defaultPref("browser.pagethumbnails.capturing_disabled", true); defaultPref("browser.helperApps.deleteTempFileOnExit", true); // delete temporary files opened with external apps /** [SECTION] HISTORY AND SESSION RESTORE * since we hide the UI for modes other than custom we want to reset it for * everyone. same thing for always on PB mode. */ pref("privacy.history.custom", true); pref("browser.privatebrowsing.autostart", false); defaultPref("browser.formfill.enable", false); // disable form history defaultPref("browser.sessionstore.privacy_level", 2); // prevent websites from storing session data like cookies and forms defaultPref("browser.sessionstore.interval", 60000); // increase time between session saves /** [SECTION] QUERY STRIPPING * enable query stripping and set the strip list. * currently we use the same one that brave uses: * https://github.com/brave/brave-core/blob/f337a47cf84211807035581a9f609853752a32fb/browser/net/brave_site_hacks_network_delegate_helper.cc#L29 */ defaultPref("privacy.query_stripping.enabled", true); defaultPref("privacy.query_stripping.strip_list", "__hsfp __hssc __hstc __s _hsenc _openstat dclid fbclid gbraid gclid hsCtaTracking igshid mc_eid ml_subscriber ml_subscriber_hash msclkid oly_anon_id oly_enc_id rb_clickid s_cid twclid vero_conv vero_id wbraid wickedid yclid"); /** * librewolf specific pref that allows to include the query stripping lists in uBO by default. * the asset file is fetched every 7 days. */ defaultPref("librewolf.uBO.assetsBootstrapLocation", "https://gitlab.com/librewolf-community/browser/source/-/raw/main/assets/uBOAssets.json"); /** [CATEGORY] NETWORKING */ /** [SECTION] HTTPS */ defaultPref("dom.security.https_only_mode", true); // only allow https in all windows, including private browsing defaultPref("network.auth.subresource-http-auth-allow", 1); // block HTTP authentication credential dialogs defaultPref("security.mixed_content.block_display_content", true); // block insecure passive content /** [SECTION] IPv6 * privacy extension isn't the default for all linux distros, so we disable ipv6. */ defaultPref("network.dns.disableIPv6", true); /** [SECTION] REFERERS * to enhance privacy but keep a certain level of usability we trim cross-origin * referers, instead of completely avoid sending them. * as a general rule, the behavior of referes which are not cross-origin should not * be changed. */ defaultPref("network.http.referer.XOriginPolicy", 0); // default, might be worth changing to 2 to stop sending them completely defaultPref("network.http.referer.XOriginTrimmingPolicy", 2); // trim referer to only send scheme, host and port /** [SECTION] WEBRTC * there's no point in disabling webrtc as mDNS protects the private IP on linux, osx and win10+. * with the below preference we protect the value even in trusted environments and for win7/8 users, * although this will likely cause breakage. */ defaultPref("media.peerconnection.ice.no_host", true); // don't use any private IPs for ICE candidate defaultPref("media.peerconnection.ice.default_address_only", true); // use a single interface for ICE candidates, the vpn one when a vpn is used /** [SECTION] PROXY */ defaultPref("network.gio.supported-protocols", ""); // disable gio as it could bypass proxy defaultPref("network.file.disable_unc_paths", true); // hidden, disable using uniform naming convention to prevent proxy bypass defaultPref("network.proxy.socks_remote_dns", true); // forces dns query through the proxy when using one defaultPref("media.peerconnection.ice.proxy_only_if_behind_proxy", true); // force webrtc inside proxy when one is used /** [SECTION] DNS */ defaultPref("network.trr.confirmationNS", "skip"); // skip undesired doh test connection defaultPref("network.dns.disablePrefetch", true); // disable dns prefetching /** * librewolf doesn't use DoH, but it can be enabled with the following prefs: * pref("network.trr.mode", 2); * pref("network.trr.uri", "https://dns.quad9.net/dns-query"); * * the possible modes are: * 0 = default * 1 = browser picks faster * 2 = DoH with system dns fallback * 3 = DoH without fallback * 5 = DoH is off, default currently */ /** [SECTION] PREFETCHING AND SPECULATIVE CONNECTIONS * disable prefecthing for different things such as links, bookmarks and predictors. */ lockPref("network.predictor.enabled", false); lockPref("network.prefetch-next", false); lockPref("network.http.speculative-parallel-limit", 0); defaultPref("browser.places.speculativeConnect.enabled", false); // disable speculative connections and domain guessing from the urlbar defaultPref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0); defaultPref("browser.urlbar.speculativeConnect.enabled", false); lockPref("browser.fixup.alternate.enabled", false); /** [SECTION] OFFLINE * let users set the browser as offline, without the browser trying to guess. */ defaultPref("network.manage-offline-status", false); /** [CATEGORY] FINGERPRINTING */ /** [SECTION] RFP * librewolf should stick to RFP for fingerprinting. we should not set prefs that interfere with it * and disabling API for no good reason will be counter productive, so it should also be avoided. */ defaultPref("privacy.resistFingerprinting", true); // rfp related settings defaultPref("privacy.resistFingerprinting.block_mozAddonManager", true); // prevents rfp from breaking AMO defaultPref("browser.startup.blankWindow", false); // if set to true it breaks RFP windows resizing defaultPref("browser.display.use_system_colors", false); // default but enforced due to RFP /** * increase the size of new RFP windows for better usability, while still using a rounded value. * if the screen resolution is lower it will stretch to the biggest possible rounded value. * also, expose hidden letterboxing pref but do not enable it for now. */ defaultPref("privacy.window.maxInnerWidth", 1600); defaultPref("privacy.window.maxInnerHeight", 900); defaultPref("privacy.resistFingerprinting.letterboxing", false); /** [SECTION] WEBGL */ defaultPref("webgl.disabled", true); /** [CATEGORY] SECURITY */ /** [SECTION] SITE ISOLATION * https://wiki.mozilla.org/Project_Fission * this has been rolled out and is now a default on most FF releases */ defaultPref("fission.autostart", true); /** [SECTION] CERTIFICATES */ defaultPref("security.cert_pinning.enforcement_level", 2); // enable strict public key pinning, might cause issues with AVs defaultPref("security.pki.sha1_enforcement_level", 1); // disable sha-1 certificates /** * enable safe negotiation and show warning when it is not supported. might cause breakage. */ defaultPref("security.ssl.require_safe_negotiation", true); defaultPref("security.ssl.treat_unsafe_negotiation_as_broken", true); /** * our strategy with revocation is to perform all possible checks with CRL, but when a cert * cannot be checked with it we use OCSP stapled with hard-fail, to still keep privacy and * increase security. * switching to crlite mode 3 (v99+) would allow us to detect false positive with OCSP. */ defaultPref("security.remote_settings.crlite_filters.enabled", true); defaultPref("security.pki.crlite_mode", 2); // mode 2 means enforce CRL checks defaultPref("security.OCSP.enabled", 1); // default defaultPref("security.OCSP.require", true); // set to hard-fail /** [SECTION] TLS/SSL */ lockPref("security.tls.enable_0rtt_data", false); // disable 0 RTT to improve tls 1.3 security pref("security.tls.version.enable-deprecated", false); // make TLS downgrades session only by enforcing it with pref() // show relevant and advanced issues on warnings and error screens defaultPref("browser.ssl_override_behavior", 1); defaultPref("browser.xul.error_pages.expert_bad_cert", true); /** [SECTION] PERMISSIONS */ lockPref("permissions.delegation.enabled", false); // force permission request to show real origin lockPref("permissions.manager.defaultsUrl", ""); // revoke special permissions for some mozilla domains /** [SECTION] FONTS */ defaultPref("gfx.font_rendering.opentype_svg.enabled", false); // disale svg opentype fonts /** [SECTION] SAFE BROWSING * disable safe browsing, including the fetch of updates. reverting the 7 prefs below * allows to perform local checks and to fetch updated lists from google. */ defaultPref("browser.safebrowsing.malware.enabled", false); defaultPref("browser.safebrowsing.phishing.enabled", false); defaultPref("browser.safebrowsing.blockedURIs.enabled", false); defaultPref("browser.safebrowsing.provider.google4.gethashURL", ""); defaultPref("browser.safebrowsing.provider.google4.updateURL", ""); defaultPref("browser.safebrowsing.provider.google.gethashURL", ""); defaultPref("browser.safebrowsing.provider.google.updateURL", ""); /** * disable safe browsing checks on downloads, both local and remote. the locked prefs * control remote checks, while the first one is for local checks only. */ defaultPref("browser.safebrowsing.downloads.enabled", false); lockPref("browser.safebrowsing.downloads.remote.enabled", false); lockPref("browser.safebrowsing.downloads.remote.url", ""); lockPref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); lockPref("browser.safebrowsing.downloads.remote.block_uncommon", false); // other safe browsing options, all default but enforce lockPref("browser.safebrowsing.passwords.enabled", false); lockPref("browser.safebrowsing.provider.google4.dataSharing.enabled", false); lockPref("browser.safebrowsing.provider.google4.dataSharingURL", ""); /** [SECTION] OTHERS */ defaultPref("network.IDN_show_punycode", true); // use punycode in idn to prevent spoofing defaultPref("pdfjs.enableScripting", false); // disable js scripting in the built-in pdf reader /** [CATEGORY] REGION */ /** [SECTION] LOCATION * replace google with mozilla as the default geolocation provide and prevent use of OS location services */ defaultPref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%"); lockPref("geo.provider.ms-windows-location", false); // [WINDOWS] lockPref("geo.provider.use_corelocation", false); // [MAC] lockPref("geo.provider.use_gpsd", false); // [LINUX] /** [SECTION] LANGUAGE * show language as en-US for all users, regardless of their OS language and browser language. * both prefs must use pref() and not defaultPref to work. */ pref("javascript.use_us_english_locale", true); pref("intl.accept_languages", "en-US, en"); // disable region specific updates from mozilla lockPref("browser.region.network.url", ""); lockPref("browser.region.update.enabled", false); /** [CATEGORY] BEHAVIOR */ /** [SECTION] DRM */ defaultPref("media.eme.enabled", false); // master switch for drm content defaultPref("media.gmp-manager.url", "data:text/plain,"); // prevent checks for plugin updates when drm is disabled // disable the widevine and the openh264 plugins defaultPref("media.gmp-provider.enabled", false); defaultPref("media.gmp-gmpopenh264.enabled", false); /** [SECTION] SEARCH AND URLBAR * disable search suggestion by default and do not update opensearch engines. urls should also be * displayed in full instead of trimming them. */ defaultPref("browser.urlbar.suggest.searches", false); defaultPref("browser.search.suggest.enabled", false); defaultPref("browser.search.update", false); defaultPref("browser.urlbar.trimURLs", false); /** * the pref disables the whole feature and hide it from the ui * (as noted in https://bugzilla.mozilla.org/show_bug.cgi?id=1755057). * this also includes the best match feature, as it is part of firefox suggest. */ pref("browser.urlbar.quicksuggest.enabled", false); /** [SECTION] DOWNLOADS * user interaction should always be required for downloads, as a way to enhance security by asking * the user to specific a certain save location. */ defaultPref("browser.download.useDownloadDir", false); defaultPref("browser.download.autohideButton", false); // do not hide download button automatically defaultPref("browser.download.manager.addToRecentDocs", false); // do not add downloads to recents defaultPref("browser.download.alwaysOpenPanel", false); // do not expand toolbar menu for every download, we already have enough interaction /** [SECTION] AUTOPLAY * block autoplay unless element is clicked, and apply the policy to all elements * including muted ones. */ defaultPref("media.autoplay.blocking_policy", 2); defaultPref("media.autoplay.default", 5); /** [SECTION] POP-UPS AND WINDOWS * disable annoyin pop-ups and limit events that can trigger them. */ defaultPref("dom.disable_beforeunload", true); // disable "confirm you want to leave" pop-ups defaultPref("dom.disable_open_during_load", true); // block pop-ups windows defaultPref("dom.popup_allowed_events", "click dblclick mousedown pointerdown"); /** * prevent scripts from resizing existing windows and opening new ones, by forcing them into * new tabs that can't be resized as well. */ defaultPref("dom.disable_window_move_resize", true); defaultPref("browser.link.open_newwindow", 3); defaultPref("browser.link.open_newwindow.restriction", 0); /** [SECTION] MOUSE */ defaultPref("middlemouse.contentLoadURL", false); // prevent mouse middle click from opening links /** [CATEGORY] EXTENSIONS */ /** [SECTION] USER INSTALLED * extensions are allowed to operate on restricted domains, while their scope * is set to profile+applications (https://mike.kaply.com/2012/02/21/understanding-add-on-scopes/). * an installation prompt should always be displayed. */ defaultPref("extensions.webextensions.restrictedDomains", ""); defaultPref("extensions.enabledScopes", 5); // hidden defaultPref("extensions.postDownloadThirdPartyPrompt", false); /** [SECTION] SYSTEM * built-in extension are not allowed to auto-update. additionally the reporter extension * of webcompat is disabled. urls are stripped for defense in depth. */ defaultPref("extensions.systemAddon.update.enabled", false); defaultPref("extensions.systemAddon.update.url", ""); lockPref("extensions.webcompat-reporter.enabled", false); lockPref("extensions.webcompat-reporter.newIssueEndpoint", ""); /** [SECTION] EXTENSION FIREWALL * the firewall can be enabled with the below prefs, but it is not a sane default: * defaultPref("extensions.webextensions.base-content-security-policy", "default-src 'none'; script-src 'none'; object-src 'none';"); * defaultPref("extensions.webextensions.base-content-security-policy.v3", "default-src 'none'; script-src 'none'; object-src 'none';"); */ /** [CATEGORY] BUILT-IN FEATURES */ /** [SECTION] UPDATER * since we do not bake auto-updates in the browser it doesn't make sense at the moment. */ lockPref("app.update.auto", false); /** [SECTION] SYNC * this functionality is disabled by default but it can be activated in one click. * this pref fully controls the feature, including its ui. */ defaultPref("identity.fxaccounts.enabled", false); /** [SECTION] LOCKWISE * disable the default password manager built into the browser, including its autofill * capabilities and formless login capture. */ defaultPref("signon.rememberSignons", false); defaultPref("signon.autofillForms", false); defaultPref("extensions.formautofill.available", "off"); defaultPref("extensions.formautofill.addresses.enabled", false); defaultPref("extensions.formautofill.creditCards.enabled", false); defaultPref("extensions.formautofill.creditCards.available", false); defaultPref("extensions.formautofill.heuristics.enabled", false); defaultPref("signon.formlessCapture.enabled", false); /** [SECTION] CONTAINERS * enable containers and show the settings to control them in the stock ui */ defaultPref("privacy.userContext.enabled", true); defaultPref("privacy.userContext.ui.enabled", true); /** [SECTION] DEVTOOLS * disable chrome and remote debugging. */ defaultPref("devtools.chrome.enabled", false); defaultPref("devtools.debugger.remote-enabled", false); defaultPref("devtools.remote.adb.extensionURL", ""); defaultPref("devtools.selfxss.count", 0); // required for devtools console to work /** [SECTION] OTHERS */ lockPref("browser.translation.engine", ""); // remove translation engine defaultPref("accessibility.force_disabled", 1); // block accessibility services defaultPref("webchannel.allowObject.urlWhitelist", ""); // do not receive objects through webchannels /** [CATEGORY] UI */ /** [SECTION] BRANDING * set librewolf support and releases urls in the UI, so that users land in the proper places. */ defaultPref("app.support.baseURL", "https://librewolf.net/docs/faq/#"); defaultPref("browser.search.searchEnginesURL", "https://librewolf.net/docs/faq/#how-do-i-add-a-search-engine"); defaultPref("browser.geolocation.warning.infoURL", "https://librewolf.net/docs/faq/#how-do-i-enable-location-aware-browsing"); defaultPref("app.feedback.baseURL", "https://librewolf.net/#questions"); defaultPref("app.releaseNotesURL", "https://gitlab.com/librewolf-community/browser"); defaultPref("app.releaseNotesURL.aboutDialog", "https://gitlab.com/librewolf-community/browser"); defaultPref("app.update.url.details", "https://gitlab.com/librewolf-community/browser"); defaultPref("app.update.url.manual", "https://gitlab.com/librewolf-community/browser"); /** [SECTION] FIRST LAUNCH * disable what's new and ui tour on first start and updates. the browser * should also not stress user about being the default one. */ defaultPref("browser.startup.homepage_override.mstone", "ignore"); defaultPref("startup.homepage_override_url", "about:blank"); defaultPref("startup.homepage_welcome_url", "about:blank"); defaultPref("startup.homepage_welcome_url.additional", ""); lockPref("browser.messaging-system.whatsNewPanel.enabled", false); lockPref("browser.uitour.enabled", false); lockPref("browser.uitour.url", ""); defaultPref("browser.shell.checkDefaultBrowser", false); /** [SECTION] NEW TAB PAGE * we want the new tab page to display nothing but the search bar without anything distracting. */ defaultPref("browser.newtab.preload", false); defaultPref("browser.newtabpage.activity-stream.section.highlights.includeDownloads", false); defaultPref("browser.newtabpage.activity-stream.section.highlights.includeVisited", false); defaultPref("browser.newtabpage.activity-stream.feeds.topsites", false); // hide pocket and sponsored content, from new tab page and search bar lockPref("browser.newtabpage.activity-stream.feeds.section.topstories", false); lockPref("browser.newtabpage.activity-stream.feeds.system.topstories", false); lockPref("browser.newtabpage.activity-stream.feeds.telemetry", false); lockPref("browser.newtabpage.activity-stream.feeds.section.topstories.options", "{\"hidden\":true}"); // hide buggy pocket section from about:preferences#home lockPref("browser.newtabpage.activity-stream.showSponsored", false); lockPref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); lockPref("browser.newtabpage.activity-stream.telemetry", false); lockPref("browser.newtabpage.activity-stream.default.sites", ""); lockPref("browser.newtabpage.activity-stream.feeds.discoverystreamfeed", false); lockPref("browser.newtabpage.activity-stream.discoverystream.enabled", false); lockPref("browser.newtabpage.activity-stream.feeds.snippets", false); // default /** [SECTION] ABOUT * remove annoying ui elements from the about pages, including about:protections */ defaultPref("browser.contentblocking.report.lockwise.enabled", false); defaultPref("browser.contentblocking.report.monitor.enabled", false); lockPref("browser.contentblocking.report.hide_vpn_banner", true); lockPref("browser.contentblocking.report.vpn.enabled", false); lockPref("browser.contentblocking.report.show_mobile_app", false); lockPref("browser.vpn_promo.enabled", false); // ...about:addons recommendations sections and more defaultPref("extensions.htmlaboutaddons.recommendations.enabled", false); defaultPref("extensions.getAddons.showPane", false); defaultPref("extensions.getAddons.cache.enabled", false); // disable fetching of extension metadata defaultPref("lightweightThemes.getMoreURL", ""); // disable button to get more themes // ...about:preferences#home defaultPref("browser.topsites.useRemoteSetting", false); // hide sponsored shortcuts button // ...and about:config defaultPref("browser.aboutConfig.showWarning", false); // hide about:preferences#moreFromMozilla defaultPref("browser.preferences.moreFromMozilla", false); /** [SECTION] RECOMMENDED * disable all "recommend as you browse" activity. */ lockPref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false); lockPref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false); /** [CATEGORY] TELEMETRY * telemetry is already disabled elsewhere and most of the stuff in here is just for redundancy. */ lockPref("toolkit.telemetry.unified", false); // master switch lockPref("toolkit.telemetry.enabled", false); // master switch lockPref("toolkit.telemetry.server", "data:,"); lockPref("toolkit.telemetry.archive.enabled", false); lockPref("toolkit.telemetry.newProfilePing.enabled", false); lockPref("toolkit.telemetry.updatePing.enabled", false); lockPref("toolkit.telemetry.firstShutdownPing.enabled", false); lockPref("toolkit.telemetry.shutdownPingSender.enabled", false); lockPref("toolkit.telemetry.shutdownPingSender.enabledFirstSession", false); // default lockPref("toolkit.telemetry.bhrPing.enabled", false); lockPref("toolkit.telemetry.reportingpolicy.firstRun", false); // default lockPref("toolkit.telemetry.cachedClientID", ""); lockPref("toolkit.telemetry.previousBuildID", ""); lockPref("toolkit.telemetry.server_owner", ""); lockPref("toolkit.coverage.opt-out", true); // hidden lockPref("toolkit.telemetry.coverage.opt-out", true); // hidden lockPref("toolkit.coverage.enabled", false); lockPref("toolkit.coverage.endpoint.base", ""); lockPref("toolkit.crashreporter.infoURL", ""); lockPref("datareporting.healthreport.uploadEnabled", false); lockPref("datareporting.policy.dataSubmissionEnabled", false); lockPref("security.protectionspopup.recordEventTelemetry", false); lockPref("browser.ping-centre.telemetry", false); // opt-out of normandy and studies lockPref("app.normandy.enabled", false); lockPref("app.normandy.api_url", ""); lockPref("app.shield.optoutstudies.enabled", false); // disable personalized extension recommendations lockPref("browser.discovery.enabled", false); lockPref("browser.discovery.containers.enabled", false); lockPref("browser.discovery.sites", ""); // disable crash report lockPref("browser.tabs.crashReporting.sendReport", false); lockPref("breakpad.reportURL", ""); // disable connectivity checks lockPref("network.connectivity-service.enabled", false); // disable captive portal lockPref("network.captive-portal-service.enabled", false); lockPref("captivedetect.canonicalURL", ""); // prevent sending server side analytics lockPref("beacon.enabled", false); /** [CATEGORY] WINDOWS * the prefs in this section only apply to windows installations and they don't have any * effect on linux, macos and bsd users. */ /** [SECTION] UPDATES * disable windows specific update services. */ lockPref("app.update.service.enabled", false); defaultPref("app.update.background.scheduling.enabled", false); /** [SECTION] OTHERS */ lockPref("default-browser-agent.enabled", false); // disable windows specific telemetry defaultPref("network.protocol-handler.external.ms-windows-store", false); // prevent links from launching windows store lockPref("toolkit.winRegisterApplicationRestart", false); // disable automatic start and session restore after reboot lockPref("security.family_safety.mode", 0); // disable win8.1 family safety cert defaultPref("network.http.windows-sso.enabled", false); // disable MS auto authentication via sso /** [CATEGORY] OVERRIDES * allow settings to be overriden with a file placed in the right location * https://librewolf.net/docs/settings/#where-do-i-find-my-librewolfoverridescfg */ let profile_directory; if (profile_directory = getenv('USERPROFILE') || getenv('HOME')) { defaultPref('autoadmin.global_config_url', `file://${profile_directory}/.librewolf/librewolf.overrides.cfg`); }