path: root/librewolf/debian/librewolf_settings/librewolf.cfg

/** 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", "6.6");


/** 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
 * 6. query stripping
 * 
 * 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
/**
 * 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.offlineApps", true);
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
 * currently we set the same query stripping list 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.strip_list", "__hsfp __hssc __hstc __s _hsenc _openstat dclid fbclid gbraid gclid hsCtaTracking igshid mc_eid ml_subscriber ml_subscriber_hash msclkid oft_c oft_ck oft_d oft_id oft_ids oft_k oft_lk oft_sk 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] CERTIFICATES */
defaultPref("security.cert_pinning.enforcement_level", 2); // enable strict public key pinning, might cause issues with AVs
/**
 * 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.
 * crlite is in mode 3 by default, which allows us to detect false positive with OCSP.
 * in v103, when crlite is fully mature, it will switch to mode 2 and no longer double-check.
 */
defaultPref("security.remote_settings.crlite_filters.enabled", true);
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 and do not update opensearch engines.
 */
defaultPref("browser.urlbar.suggest.searches", false);
defaultPref("browser.search.suggest.enabled", false);
defaultPref("browser.search.update", 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
// NOTE/TODO: net really the right category/section, probably?
defaultPref("services.settings.server", "https://%.invalid") // set the remote settings URL (REMOTE_SETTINGS_SERVER_URL in the code)



/** [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);
lockPref("browser.promo.focus.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`);
}