privacy/firefox/user.js

// Mozilla User Preferences
//
// 2021/09/11
//
// Based on Privacy-Handbuch, merged/adjusted strong user.js
// Download: https://www.privacy-handbuch.de/handbuch_21u.htm
//
// Install when Firefox is closed!
// Feel free to comment in or modify if you don't like the default setting.

user_pref("app.normandy.enabled", false);
user_pref("app.shield.optoutstudies.enabled", false);
user_pref("beacon.enabled", false);
user_pref("browser.cache.disk.enable", false);
user_pref("browser.cache.disk_cache_ssl", false);
user_pref("browser.cache.offline.enable", false);
user_pref("browser.chrome.site_icons", false);
// ignore any website fonts
//user_pref("browser.display.use_document_fonts", 0);
// true to disallow playback of DRM content
user_pref("browser.eme.ui.enabled", false);
user_pref("browser.fixup.alternate.enabled", false);
user_pref("browser.formfill.enable", false);
user_pref("browser.link.open_newwindow.restriction", 0);
user_pref("browser.messaging-system.whatsNewPanel.enabled", false);
user_pref("browser.newtabpage.enabled", false);
user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
user_pref("browser.newtabpage.activity-stream.feeds.topsites", false);
user_pref("browser.newtabpage.activity-stream.feeds.system.topsites", false);
user_pref("browser.newtabpage.activity-stream.showSponsored", false);
user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false);
user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false);
user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false);
user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);
user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
user_pref("browser.newtabpage.activity-stream.telemetry", false);
user_pref("browser.pagethumbnails.capturing_disabled", true);
user_pref("browser.ping-centre.telemetry", false);
user_pref("browser.region.update.enabled", false);
user_pref("browser.region.network.url", "");
user_pref("browser.safebrowsing.downloads.remote.url", " ");
user_pref("browser.safebrowsing.downloads.enabled", false);
user_pref("browser.safebrowsing.phishing.enabled", false);
user_pref("browser.safebrowsing.malware.enabled", false);
user_pref("browser.safebrowsing.downloads.remote.enabled", false);
user_pref("browser.safebrowsing.downloads.remote.block_dangerous", false);
user_pref("browser.safebrowsing.downloads.remote.block_dangerous_host", false);
user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false);
user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false);
user_pref("browser.safebrowsing.blockedURIs.enabled", false);
user_pref("browser.safebrowsing.provider.google.gethashURL", "");
user_pref("browser.safebrowsing.provider.google.updateURL", "");
user_pref("browser.safebrowsing.provider.google4.gethashURL", "");
user_pref("browser.safebrowsing.provider.google4.updateURL", "");
user_pref("browser.safebrowsing.provider.mozilla.gethashURL", "");
user_pref("browser.safebrowsing.provider.mozilla.updateURL", "");
user_pref("browser.search.update", false);
user_pref("browser.search.suggest.enabled", false);
// set to -1 for unlimited ctrl+shift+t
user_pref("browser.sessionstore.max_tabs_undo", 5);
user_pref("browser.sessionstore.max_windows_undo", 0);
user_pref("browser.sessionstore.privacy_level", 2);
user_pref("browser.slowStartup.notificationDisabled", true);
user_pref("browser.slowStartup.maxSamples", 0);
// 0 = blank page, 1 = home pages, 2 = last visited, 3 = resume previous session
user_pref("browser.startup.page", 0);
user_pref("browser.startup.homepage_override.mstone", "ignore");
user_pref("browser.tabs.crashReporting.sendReport", false);
user_pref("browser.urlbar.speculativeConnect.enabled", false);
user_pref("browser.urlbar.trimURLs", false);
user_pref("browser.urlbar.suggest.openpage", false);
user_pref("browser.urlbar.suggest.searches", false);
user_pref("browser.urlbar.suggest.topsites", false);
user_pref("browser.urlbar.suggest.engines", false);
user_pref("browser.urlbar.groupLabels.enabled", false);
user_pref("datareporting.healthreport.uploadEnabled", false);
user_pref("datareporting.policy.dataSubmissionEnabled", false);
user_pref("dom.block_download_insecure", true);
user_pref("dom.enable_performance", false);
user_pref("dom.enable_performance_navigation_timing", false);
user_pref("dom.enable_resource_timing", false);
user_pref("dom.event.clipboardevents.enabled", true);
user_pref("dom.push.connection.enabled", false);
user_pref("dom.push.enabled", false);
user_pref("dom.push.serverURL", "");
user_pref("dom.security.https_only_mode", true);
user_pref("dom.security.https_only_mode_send_http_background_request", false);
user_pref("dom.vibrator.max_vibrate_ms", 0);
user_pref("dom.security.https_first", true);
user_pref("extensions.blocklist.enabled", false);
user_pref("extensions.formautofill.addresses.enabled", false);
user_pref("extensions.formautofill.creditCards.enabled", false);
user_pref("extensions.formautofill.heuristics.enabled", false);
user_pref("extensions.getAddons.cache.enabled", false);
user_pref("extensions.htmlaboutaddons.recommendations.enabled", false);
user_pref("extensions.ui.lastCategory", "addons://list/extension");
user_pref("extensions.pocket.enabled", false);
user_pref("extensions.screenshots.disabled", true);
user_pref("extensions.systemAddon.update.enabled", false);
user_pref("extensions.webextensions.restrictedDomains", "");
//user_pref("font.blacklist.underline_offset", "");
//user_pref("gfx.direct2d.disabled", true);
//user_pref("gfx.downloadable_fonts.enabled", false);
//user_pref("gfx.font_rendering.opentype_svg.enabled", false);
//user_pref("gfx.font_rendering.graphite.enabled", false);
//user_pref("javascript.options.baselinejit", false);
//user_pref("javascript.options.ion", false);
//user_pref("layers.acceleration.disabled", true);
//user_pref("layout.css.font-loading-api.enabled", false);
user_pref("media.autoplay.default", 5);
user_pref("media.autoplay.blocking_policy", 2);
user_pref("media.eme.enabled", false);
//user_pref("media.gmp-gmpopenh264.enabled", false);
//user_pref("media.gmp-gmpopenh264.autoupdate", false);
//user_pref("media.gmp-gmpopenh264.provider.enabled", false);
//user_pref("media.gmp-gmpopenh264.visible", false);
//user_pref("media.hardware-video-decoding.enabled", false);
user_pref("media.navigator.enabled", false);
user_pref("media.navigator.video.enabled", false);
user_pref("media.peerconnection.enabled", false);
user_pref("media.video_stats.enabled", false);
user_pref("media.webspeech.synth.enabled", false);
// 5 = isolate
user_pref("network.cookie.cookieBehavior", 4);
user_pref("network.dns.disablePrefetch", true);
user_pref("network.captive-portal-service.enabled", false);
user_pref("network.connectivity-service.enabled", false);
// set policy to 3 lifetime.days to kick in, see http://kb.mozillazine.org/Network.cookie.lifetimePolicy
user_pref("network.cookie.lifetimePolicy", 2);
//user_pref("network.cookie.lifetime.days", 5)
user_pref("network.http.altsvc.enabled", false);
user_pref("network.http.altsvc.oe", false);
user_pref("network.http.referer.XOriginPolicy", 2);
user_pref("network.http.speculative-parallel-limit", 0);
user_pref("network.IDN_show_punycode", true);
user_pref("network.manage-offline-status", false);
// allow local storage, so websites won't break
user_pref("offline-apps.allow_by_default", true);
//user_pref("offline-apps.quota.warn", 0);
user_pref("pdfjs.disabled", true);
user_pref("pdfjs.enableScripting", false);
user_pref("permissions.default.desktop-notification", 2);
user_pref("permissions.isolateBy.userContext", true);
user_pref("places.history.enabled", true);
user_pref("plugin.default.state", 0);
user_pref("plugins.update.url", "");
user_pref("privacy.clearOnShutdown.cache", true);
// allow to set exceptions
user_pref("privacy.clearOnShutdown.cookies", false);
user_pref("privacy.clearOnShutdown.downloads", true);
// keep history
user_pref("privacy.clearOnShutdown.history", false);
user_pref("privacy.clearOnShutdown.offlineApps", true);
// allow to set exceptions
user_pref("privacy.clearOnShutdown.siteSettings", false);
user_pref("privacy.cpd.offlineApps", true);
user_pref("privacy.cpd.passwords", true);
user_pref("privacy.cpd.siteSettings", true);
user_pref("privacy.donottrackheader.enabled", false);
user_pref("privacy.firstparty.isolate", false);
user_pref("privacy.history.custom", true);
user_pref("privacy.sanitize.sanitizeOnShutdown", true);
user_pref("privacy.userContext.enabled", true);
user_pref("privacy.userContext.ui.enabled", true);
// avoid potential date bugs
user_pref("privacy.resistFingerprinting", false);
user_pref("reader.parse-on-load.enabled", false);
user_pref("security.cert_pinning.enforcement_level", 2);
user_pref("security.certerrors.mitm.auto_enable_enterprise_roots", false);
user_pref("security.family_safety.mode", 0);
user_pref("security.identityblock.show_extended_validation", true);
user_pref("security.insecure_connection_icon.enabled", true);
user_pref("security.insecure_connection_icon.pbmode.enabled", true);
user_pref("security.insecure_connection_text.enabled", true);
user_pref("security.insecure_connection_text.pbmode.enabled", true);
user_pref("security.mixed_content.upgrade_display_content", true);
user_pref("security.ssl.require_safe_negotiation", true);
user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
user_pref("signon.autofillForms", false);
user_pref("signon.formlessCapture.enabled", false);
user_pref("signon.rememberSignons", false);
user_pref("svg.disabled", false);
user_pref("toolkit.coverage.endpoint.base", "");
user_pref("toolkit.coverage.opt-out", true);
user_pref("toolkit.telemetry.archive.enabled", false);
user_pref("toolkit.telemetry.coverage.opt-out", true);
user_pref("toolkit.telemetry.firstShutdownPing.enabled", false);
user_pref("toolkit.telemetry.hybridContent.enabled", false);
user_pref("toolkit.telemetry.bhrPing.enabled", false);
user_pref("toolkit.telemetry.newProfilePing.enabled", false);
user_pref("toolkit.telemetry.shutdownPingSender.enabled", false);
user_pref("toolkit.telemetry.updatePing.enabled", false);
user_pref("toolkit.telemetry.unified", false);
user_pref("ui.use_standins_for_native_colors", true);
user_pref("ui.systemUsesDarkTheme", 0);
user_pref("webgl.disabled", true);
user_pref("webgl.disable-fail-if-major-performance-caveat", true);
user_pref("webgl.enable-webgl2", false);
user_pref("webgl.min_capability_mode", true);
user_pref("webgl.enable-debug-renderer-info", false);

user_pref("network.trr.resolvers", '[{ "name": "Cloudflare", "url": "https://mozilla.cloudflare-dns.com/dns-query" },{ "name": "NextDNS", "url": "https://trr.dns.nextdns.io/" },{ "name": "dnsforge.de", "url": "https://dnsforge.de/dns-query" },{ "name": "Digitale Gesellschaft (CH)", "url": "https://dns.digitale-gesellschaft.ch/dns-query" }, { "name": "Freifunk Muenchen", "url": "https://doh.ffmuc.net" }, { "name": "BlahDNS (DE)", "url": "https://doh-de.blahdns.com/dns-query" }, { "name": "BlahDNS (FI)", "url": "https://doh-fi.blahdns.com/dns-query" }, { "name": "Quad9", "url": "https://dns.quad9.net/dns-query" }, { "name": "dns.myservermanager.com", "url": "https://dns.myservermanager.com/dns-query" }]');

// Enable green icons again
user_pref("security.secure_connection_icon_color_gray", false);

// Temporarily enabled (for now) as there are no hardware devices on desktop PCs to leak any information
user_pref("dom.webnotifications.enabled", true);
user_pref("dom.gamepad.enabled", true);
user_pref("device.sensors.enabled", true);

// adjust the following to your liking
// 0 = use system DNS, 2 = use DNS-over-HTTPS resolver, select one in UI under network, otherwise you might end up with cloudflare
user_pref("network.trr.mode", 0);
user_pref("network.trr.uri", "https://dns.myservermanager.com/dns-query");

// customly set, adjust to your liking
user_pref("general.warnOnAboutConfig", false);
user_pref("general.smoothScroll", false);
user_pref("general.smoothScroll.pages", false);
user_pref("mousewheel.min_line_scroll_amount", 40);
user_pref("media.cache_readahead_limit", 999999);
user_pref("media.cache_resume_threshold", 999999);

// Linux specific
user_pref("widget.disable-workspace-management", true);