diff options
Diffstat (limited to 'debian/local/pref')
| -rw-r--r-- | debian/local/pref/user.js | 1216 |
1 files changed, 1216 insertions, 0 deletions
diff --git a/debian/local/pref/user.js b/debian/local/pref/user.js new file mode 100644 index 0000000000..ebb40a6c13 --- /dev/null +++ b/debian/local/pref/user.js @@ -0,0 +1,1216 @@ +/****** +* name: arkenfox user.js +* date: 27 August 2023 +* version: 115 +* url: https://github.com/arkenfox/user.js +* license: MIT: https://github.com/arkenfox/user.js/blob/master/LICENSE.txt + +* README: + + 1. Consider using Tor Browser if it meets your needs or fits your threat model + * https://2019.www.torproject.org/about/torusers.html + 2. Read the entire wiki + * https://github.com/arkenfox/user.js/wiki + 3. If you skipped step 2, return to step 2 + 4. Make changes in a user-overrides.js + * There are often trade-offs and conflicts between security vs privacy vs anti-tracking + and these need to be balanced against functionality & convenience & breakage + * Some site breakage and unintended consequences will happen. Everyone's experience will differ + e.g. some user data is erased on exit (section 2800), change this to suit your needs + * While not 100% definitive, search for "[SETUP" tags + 5. Some tag info + [SETUP-SECURITY] it's one item, read it + [SETUP-WEB] can cause some websites to break + [SETUP-CHROME] changes how Firefox itself behaves (i.e. not directly website related) + 6. Override Recipes: https://github.com/arkenfox/user.js/issues/1080 + +* RELEASES: https://github.com/arkenfox/user.js/releases + + * It is best to use the arkenfox release that is optimized for and matches your Firefox version + * EVERYONE: each release + - run prefsCleaner to reset prefs made inactive, including deprecated (9999s) + ESR102 + - If you are not using arkenfox v102-1... (not a definitive list) + - 2815: clearOnShutdown cookies + offlineApps should be false + - 9999: switch the appropriate deprecated section(s) back on + +* INDEX: + + 0100: STARTUP + 0200: GEOLOCATION / LANGUAGE / LOCALE + 0300: QUIETER FOX + 0400: SAFE BROWSING + 0600: BLOCK IMPLICIT OUTBOUND + 0700: DNS / DoH / PROXY / SOCKS + 0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS + 0900: PASSWORDS + 1000: DISK AVOIDANCE + 1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP) + 1400: FONTS + 1600: REFERERS + 1700: CONTAINERS + 2000: PLUGINS / MEDIA / WEBRTC + 2400: DOM (DOCUMENT OBJECT MODEL) + 2600: MISCELLANEOUS + 2700: ETP (ENHANCED TRACKING PROTECTION) + 2800: SHUTDOWN & SANITIZING + 4500: RFP (RESIST FINGERPRINTING) + 5000: OPTIONAL OPSEC + 5500: OPTIONAL HARDENING + 6000: DON'T TOUCH + 7000: DON'T BOTHER + 8000: DON'T BOTHER: FINGERPRINTING + 9000: NON-PROJECT RELATED + 9999: DEPRECATED / REMOVED / LEGACY / RENAMED + +******/ + +/* START: internal custom pref to test for syntax errors + * [NOTE] Not all syntax errors cause parsing to abort i.e. reaching the last debug pref + * no longer necessarily means that all prefs have been applied. Check the console right + * after startup for any warnings/error messages related to non-applied prefs + * [1] https://blog.mozilla.org/nnethercote/2018/03/09/a-new-preferences-parser-for-firefox/ ***/ +user_pref("_user.js.parrot", "START: Oh yes, the Norwegian Blue... what's wrong with it?"); + +/* 0000: disable about:config warning ***/ +user_pref("browser.aboutConfig.showWarning", false); + +/*** [SECTION 0100]: STARTUP ***/ +user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!"); +/* 0102: set startup page [SETUP-CHROME] + * 0=blank, 1=home, 2=last visited page, 3=resume previous session + * [NOTE] Session Restore is cleared with history (2811), and not used in Private Browsing mode + * [SETTING] General>Startup>Restore previous session ***/ +user_pref("browser.startup.page", 0); +/* 0103: set HOME+NEWWINDOW page + * about:home=Firefox Home (default, see 0105), custom URL, about:blank + * [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/ +user_pref("browser.startup.homepage", "about:blank"); +/* 0104: set NEWTAB page + * true=Firefox Home (default, see 0105), false=blank page + * [SETTING] Home>New Windows and Tabs>New tabs ***/ +user_pref("browser.newtabpage.enabled", false); +/* 0105: disable sponsored content on Firefox Home (Activity Stream) + * [SETTING] Home>Firefox Home Content ***/ +user_pref("browser.newtabpage.activity-stream.showSponsored", false); // [FF58+] Pocket > Sponsored Stories +user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // [FF83+] Sponsored shortcuts +/* 0106: clear default topsites + * [NOTE] This does not block you from adding your own ***/ +user_pref("browser.newtabpage.activity-stream.default.sites", ""); + +/*** [SECTION 0200]: GEOLOCATION / LANGUAGE / LOCALE ***/ +user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely deceased!"); +/* 0201: use Mozilla geolocation service instead of Google if permission is granted [FF74+] + * Optionally enable logging to the console (defaults to false) ***/ +user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%"); + // user_pref("geo.provider.network.logging.enabled", true); // [HIDDEN PREF] +/* 0202: disable using the OS's geolocation service ***/ +user_pref("geo.provider.ms-windows-location", false); // [WINDOWS] +user_pref("geo.provider.use_corelocation", false); // [MAC] +user_pref("geo.provider.use_gpsd", false); // [LINUX] +user_pref("geo.provider.use_geoclue", false); // [FF102+] [LINUX] +/* 0210: set preferred language for displaying pages + * [SETTING] General>Language and Appearance>Language>Choose your preferred language... + * [TEST] https://addons.mozilla.org/about ***/ +user_pref("intl.accept_languages", "en-US, en"); +/* 0211: use en-US locale regardless of the system or region locale + * [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages [1] + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=867501,1629630 ***/ +user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF] + +/*** [SECTION 0300]: QUIETER FOX ***/ +user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!"); +/** RECOMMENDATIONS ***/ +/* 0320: disable recommendation pane in about:addons (uses Google Analytics) ***/ +user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF] +/* 0321: disable recommendations in about:addons' Extensions and Themes panes [FF68+] ***/ +user_pref("extensions.htmlaboutaddons.recommendations.enabled", false); +/* 0322: disable personalized Extension Recommendations in about:addons and AMO [FF65+] + * [NOTE] This pref has no effect when Health Reports (0331) are disabled + * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to make personalized extension recommendations + * [1] https://support.mozilla.org/kb/personalized-extension-recommendations ***/ +user_pref("browser.discovery.enabled", false); + +/** TELEMETRY ***/ +/* 0330: disable new data submission [FF41+] + * If disabled, no policy is shown or upload takes place, ever + * [1] https://bugzilla.mozilla.org/1195552 ***/ +user_pref("datareporting.policy.dataSubmissionEnabled", false); +/* 0331: disable Health Reports + * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data ***/ +user_pref("datareporting.healthreport.uploadEnabled", false); +/* 0332: disable telemetry + * The "unified" pref affects the behavior of the "enabled" pref + * - If "unified" is false then "enabled" controls the telemetry module + * - If "unified" is true then "enabled" only controls whether to record extended data + * [NOTE] "toolkit.telemetry.enabled" is now LOCKED to reflect prerelease (true) or release builds (false) [2] + * [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html + * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/ +user_pref("toolkit.telemetry.unified", false); +user_pref("toolkit.telemetry.enabled", false); // see [NOTE] +user_pref("toolkit.telemetry.server", "data:,"); +user_pref("toolkit.telemetry.archive.enabled", false); +user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+] +user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); // [FF55+] +user_pref("toolkit.telemetry.updatePing.enabled", false); // [FF56+] +user_pref("toolkit.telemetry.bhrPing.enabled", false); // [FF57+] Background Hang Reporter +user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); // [FF57+] +/* 0333: disable Telemetry Coverage + * [1] https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/ ***/ +user_pref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN PREF] +user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF] +user_pref("toolkit.coverage.endpoint.base", ""); +/* 0334: disable PingCentre telemetry (used in several System Add-ons) [FF57+] + * Defense-in-depth: currently covered by 0331 ***/ +user_pref("browser.ping-centre.telemetry", false); +/* 0335: disable Firefox Home (Activity Stream) telemetry ***/ +user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false); +user_pref("browser.newtabpage.activity-stream.telemetry", false); + +/** STUDIES ***/ +/* 0340: disable Studies + * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to install and run studies ***/ +user_pref("app.shield.optoutstudies.enabled", false); +/* 0341: disable Normandy/Shield [FF60+] + * Shield is a telemetry system that can push and test "recipes" + * [1] https://mozilla.github.io/normandy/ ***/ +user_pref("app.normandy.enabled", false); +user_pref("app.normandy.api_url", ""); + +/** CRASH REPORTS ***/ +/* 0350: disable Crash Reports ***/ +user_pref("breakpad.reportURL", ""); +user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+] + // user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+] [DEFAULT: false] +/* 0351: enforce no submission of backlogged Crash Reports [FF58+] + * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports ***/ +user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [DEFAULT: false] + +/** OTHER ***/ +/* 0360: disable Captive Portal detection + * [1] https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy ***/ +user_pref("captivedetect.canonicalURL", ""); +user_pref("network.captive-portal-service.enabled", false); // [FF52+] +/* 0361: disable Network Connectivity checks [FF65+] + * [1] https://bugzilla.mozilla.org/1460537 ***/ +user_pref("network.connectivity-service.enabled", false); + +/*** [SECTION 0400]: SAFE BROWSING (SB) + SB has taken many steps to preserve privacy. If required, a full url is never sent + to Google, only a part-hash of the prefix, hidden with noise of other real part-hashes. + Firefox takes measures such as stripping out identifying parameters and since SBv4 (FF57+) + doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity) + + [1] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/ + [2] https://wiki.mozilla.org/Security/Safe_Browsing + [3] https://support.mozilla.org/kb/how-does-phishing-and-malware-protection-work + [4] https://educatedguesswork.org/posts/safe-browsing-privacy/ +***/ +user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!"); +/* 0401: disable SB (Safe Browsing) + * [WARNING] Do this at your own risk! These are the master switches + * [SETTING] Privacy & Security>Security>... Block dangerous and deceptive content ***/ + // user_pref("browser.safebrowsing.malware.enabled", false); + // user_pref("browser.safebrowsing.phishing.enabled", false); +/* 0402: disable SB checks for downloads (both local lookups + remote) + * This is the master switch for the safebrowsing.downloads* prefs (0403, 0404) + * [SETTING] Privacy & Security>Security>... "Block dangerous downloads" ***/ + // user_pref("browser.safebrowsing.downloads.enabled", false); +/* 0403: disable SB checks for downloads (remote) + * To verify the safety of certain executable files, Firefox may submit some information about the + * file, including the name, origin, size and a cryptographic hash of the contents, to the Google + * Safe Browsing service which helps Firefox determine whether or not the file should be blocked + * [SETUP-SECURITY] If you do not understand this, or you want this protection, then override this ***/ +user_pref("browser.safebrowsing.downloads.remote.enabled", false); + // user_pref("browser.safebrowsing.downloads.remote.url", ""); // Defense-in-depth +/* 0404: disable SB checks for unwanted software + * [SETTING] Privacy & Security>Security>... "Warn you about unwanted and uncommon software" ***/ + // user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); + // user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false); +/* 0405: disable "ignore this warning" on SB warnings [FF45+] + * If clicked, it bypasses the block for that session. This is a means for admins to enforce SB + * [TEST] see https://github.com/arkenfox/user.js/wiki/Appendix-A-Test-Sites#-mozilla + * [1] https://bugzilla.mozilla.org/1226490 ***/ + // user_pref("browser.safebrowsing.allowOverride", false); + +/*** [SECTION 0600]: BLOCK IMPLICIT OUTBOUND [not explicitly asked for - e.g. clicked on] ***/ +user_pref("_user.js.parrot", "0600 syntax error: the parrot's no more!"); +/* 0601: disable link prefetching + * [1] https://developer.mozilla.org/docs/Web/HTTP/Link_prefetching_FAQ ***/ +user_pref("network.prefetch-next", false); +/* 0602: disable DNS prefetching + * [1] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/ +user_pref("network.dns.disablePrefetch", true); + // user_pref("network.dns.disablePrefetchFromHTTPS", true); // [DEFAULT: true] +/* 0603: disable predictor / prefetching ***/ +user_pref("network.predictor.enabled", false); +user_pref("network.predictor.enable-prefetch", false); // [FF48+] [DEFAULT: false] +/* 0604: disable link-mouseover opening connection to linked server + * [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests ***/ +user_pref("network.http.speculative-parallel-limit", 0); +/* 0605: disable mousedown speculative connections on bookmarks and history [FF98+] ***/ +user_pref("browser.places.speculativeConnect.enabled", false); +/* 0610: enforce no "Hyperlink Auditing" (click tracking) + * [1] https://www.bleepingcomputer.com/news/software/major-browsers-to-prevent-disabling-of-click-tracking-privacy-risk/ ***/ + // user_pref("browser.send_pings", false); // [DEFAULT: false] + +/*** [SECTION 0700]: DNS / DoH / PROXY / SOCKS ***/ +user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!"); +/* 0702: set the proxy server to do any DNS lookups when using SOCKS + * e.g. in Tor, this stops your local DNS server from knowing your Tor destination + * as a remote Tor node will handle the DNS request + * [1] https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers ***/ +user_pref("network.proxy.socks_remote_dns", true); +/* 0703: disable using UNC (Uniform Naming Convention) paths [FF61+] + * [SETUP-CHROME] Can break extensions for profiles on network shares + * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/26424 ***/ +user_pref("network.file.disable_unc_paths", true); // [HIDDEN PREF] +/* 0704: disable GIO as a potential proxy bypass vector + * Gvfs/GIO has a set of supported protocols like obex, network, archive, computer, + * dav, cdda, gphoto2, trash, etc. By default only sftp is accepted (FF87+) + * [1] https://bugzilla.mozilla.org/1433507 + * [2] https://en.wikipedia.org/wiki/GVfs + * [3] https://en.wikipedia.org/wiki/GIO_(software) ***/ +user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF] +/* 0705: disable proxy direct failover for system requests [FF91+] + * [WARNING] Default true is a security feature against malicious extensions [1] + * [SETUP-CHROME] If you use a proxy and you trust your extensions + * [1] https://blog.mozilla.org/security/2021/10/25/securing-the-proxy-api-for-firefox-add-ons/ ***/ + // user_pref("network.proxy.failover_direct", false); +/* 0706: disable proxy bypass for system request failures [FF95+] + * RemoteSettings, UpdateService, Telemetry [1] + * [WARNING] If false, this will break the fallback for some security features + * [SETUP-CHROME] If you use a proxy and you understand the security impact + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1732792,1733994,1733481 ***/ + // user_pref("network.proxy.allow_bypass", false); +/* 0710: disable DNS-over-HTTPS (DoH) rollout [FF60+] + * 0=default, 2=increased (TRR (Trusted Recursive Resolver) first), 3=max (TRR only), 5=off + * see "doh-rollout.home-region": USA 2019, Canada 2021, Russia/Ukraine 2022 [3] + * [SETTING] Privacy & Security>DNS over HTTPS + * [1] https://hacks.mozilla.org/2018/05/a-cartoon-intro-to-dns-over-https/ + * [2] https://wiki.mozilla.org/Security/DOH-resolver-policy + * [3] https://support.mozilla.org/en-US/kb/firefox-dns-over-https + * [4] https://www.eff.org/deeplinks/2020/12/dns-doh-and-odoh-oh-my-year-review-2020 ***/ + // user_pref("network.trr.mode", 5); + +/*** [SECTION 0800]: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS ***/ +user_pref("_user.js.parrot", "0800 syntax error: the parrot's ceased to be!"); +/* 0802: disable location bar domain guessing + * domain guessing intercepts DNS "hostname not found errors" and resends a + * request (e.g. by adding www or .com). This is inconsistent use (e.g. FQDNs), does not work + * via Proxy Servers (different error), is a flawed use of DNS (TLDs: why treat .com + * as the 411 for DNS errors?), privacy issues (why connect to sites you didn't + * intend to), can leak sensitive data (e.g. query strings: e.g. Princeton attack), + * and is a security risk (e.g. common typos & malicious sites set up to exploit this) ***/ +user_pref("browser.fixup.alternate.enabled", false); // [DEFAULT: false FF104+] +/* 0804: disable live search suggestions + * [NOTE] Both must be true for the location bar to work + * [SETUP-CHROME] Override these if you trust and use a privacy respecting search engine + * [SETTING] Search>Provide search suggestions | Show search suggestions in address bar results ***/ +user_pref("browser.search.suggest.enabled", false); +user_pref("browser.urlbar.suggest.searches", false); +/* 0805: disable location bar making speculative connections [FF56+] + * [1] https://bugzilla.mozilla.org/1348275 ***/ +user_pref("browser.urlbar.speculativeConnect.enabled", false); +/* 0806: disable location bar leaking single words to a DNS provider **after searching** [FF78+] + * 0=never resolve, 1=use heuristics, 2=always resolve + * [1] https://bugzilla.mozilla.org/1642623 ***/ +user_pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0); // [DEFAULT: 0 FF104+] +/* 0807: disable location bar contextual suggestions [FF92+] + * [SETTING] Privacy & Security>Address Bar>Suggestions from... + * [1] https://blog.mozilla.org/data/2021/09/15/data-and-firefox-suggest/ ***/ +user_pref("browser.urlbar.suggest.quicksuggest.nonsponsored", false); // [FF95+] +user_pref("browser.urlbar.suggest.quicksuggest.sponsored", false); +/* 0808: disable tab-to-search [FF85+] + * Alternatively, you can exclude on a per-engine basis by unchecking them in Options>Search + * [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest>Search engines ***/ + // user_pref("browser.urlbar.suggest.engines", false); +/* 0810: disable search and form history + * [SETUP-WEB] Be aware that autocomplete form data can be read by third parties [1][2] + * [NOTE] We also clear formdata on exit (2811) + * [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history + * [1] https://blog.mindedsecurity.com/2011/10/autocompleteagain.html + * [2] https://bugzilla.mozilla.org/381681 ***/ +user_pref("browser.formfill.enable", false); +/* 0820: disable coloring of visited links + * [SETUP-HARDEN] Bulk rapid history sniffing was mitigated in 2010 [1][2]. Slower and more expensive + * redraw timing attacks were largely mitigated in FF77+ [3]. Using RFP (4501) further hampers timing + * attacks. Don't forget clearing history on exit (2811). However, social engineering [2#limits][4][5] + * and advanced targeted timing attacks could still produce usable results + * [1] https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector + * [2] https://dbaron.org/mozilla/visited-privacy + * [3] https://bugzilla.mozilla.org/1632765 + * [4] https://earthlng.github.io/testpages/visited_links.html (see github wiki APPENDIX A on how to use) + * [5] https://lcamtuf.blogspot.com/2016/08/css-mix-blend-mode-is-bad-for-keeping.html ***/ + // user_pref("layout.css.visited_links_enabled", false); + +/*** [SECTION 0900]: PASSWORDS + [1] https://support.mozilla.org/kb/use-primary-password-protect-stored-logins-and-pas +***/ +user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!"); +/* 0903: disable auto-filling username & password form fields + * can leak in cross-site forms *and* be spoofed + * [NOTE] Username & password is still available when you enter the field + * [SETTING] Privacy & Security>Logins and Passwords>Autofill logins and passwords + * [1] https://freedom-to-tinker.com/2017/12/27/no-boundaries-for-user-identities-web-trackers-exploit-browser-login-managers/ + * [2] https://homes.esat.kuleuven.be/~asenol/leaky-forms/ ***/ +user_pref("signon.autofillForms", false); +/* 0904: disable formless login capture for Password Manager [FF51+] ***/ +user_pref("signon.formlessCapture.enabled", false); +/* 0905: limit (or disable) HTTP authentication credentials dialogs triggered by sub-resources [FF41+] + * hardens against potential credentials phishing + * 0 = don't allow sub-resources to open HTTP authentication credentials dialogs + * 1 = don't allow cross-origin sub-resources to open HTTP authentication credentials dialogs + * 2 = allow sub-resources to open HTTP authentication credentials dialogs (default) ***/ +user_pref("network.auth.subresource-http-auth-allow", 1); +/* 0906: enforce no automatic authentication on Microsoft sites [FF91+] [WINDOWS 10+] + * [SETTING] Privacy & Security>Logins and Passwords>Allow Windows single sign-on for... + * [1] https://support.mozilla.org/kb/windows-sso ***/ + // user_pref("network.http.windows-sso.enabled", false); // [DEFAULT: false] + +/*** [SECTION 1000]: DISK AVOIDANCE ***/ +user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!"); +/* 1001: disable disk cache + * [SETUP-CHROME] If you think disk cache helps perf, then feel free to override this + * [NOTE] We also clear cache on exit (2811) ***/ +user_pref("browser.cache.disk.enable", false); +/* 1002: disable media cache from writing to disk in Private Browsing + * [NOTE] MSE (Media Source Extensions) are already stored in-memory in PB ***/ +user_pref("browser.privatebrowsing.forceMediaMemoryCache", true); // [FF75+] +user_pref("media.memory_cache_max_size", 65536); +/* 1003: disable storing extra session data [SETUP-CHROME] + * define on which sites to save extra session data such as form content, cookies and POST data + * 0=everywhere, 1=unencrypted sites, 2=nowhere ***/ +user_pref("browser.sessionstore.privacy_level", 2); +/* 1005: disable automatic Firefox start and session restore after reboot [FF62+] [WINDOWS] + * [1] https://bugzilla.mozilla.org/603903 ***/ +user_pref("toolkit.winRegisterApplicationRestart", false); +/* 1006: disable favicons in shortcuts + * URL shortcuts use a cached randomly named .ico file which is stored in your + * profile/shortcutCache directory. The .ico remains after the shortcut is deleted + * If set to false then the shortcuts use a generic Firefox icon ***/ +user_pref("browser.shell.shortcutFavicons", false); + +/*** [SECTION 1200]: HTTPS (SSL/TLS / OCSP / CERTS / HPKP) + Your cipher and other settings can be used in server side fingerprinting + [TEST] https://www.ssllabs.com/ssltest/viewMyClient.html + [TEST] https://browserleaks.com/ssl + [TEST] https://ja3er.com/ + [1] https://www.securityartwork.es/2017/02/02/tls-client-fingerprinting-with-bro/ +***/ +user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!"); +/** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/ +/* 1201: require safe negotiation + * Blocks connections to servers that don't support RFC 5746 [2] as they're potentially vulnerable to a + * MiTM attack [3]. A server without RFC 5746 can be safe from the attack if it disables renegotiations + * but the problem is that the browser can't know that. Setting this pref to true is the only way for the + * browser to ensure there will be no unsafe renegotiations on the channel between the browser and the server + * [SETUP-WEB] SSL_ERROR_UNSAFE_NEGOTIATION: is it worth overriding this for that one site? + * [STATS] SSL Labs (Feb 2023) reports over 99.3% of top sites have secure renegotiation [4] + * [1] https://wiki.mozilla.org/Security:Renegotiation + * [2] https://datatracker.ietf.org/doc/html/rfc5746 + * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555 + * [4] https://www.ssllabs.com/ssl-pulse/ ***/ +user_pref("security.ssl.require_safe_negotiation", true); +/* 1206: disable TLS1.3 0-RTT (round-trip time) [FF51+] + * This data is not forward secret, as it is encrypted solely under keys derived using + * the offered PSK. There are no guarantees of non-replay between connections + * [1] https://github.com/tlswg/tls13-spec/issues/1001 + * [2] https://www.rfc-editor.org/rfc/rfc9001.html#name-replay-attacks-with-0-rtt + * [3] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/ ***/ +user_pref("security.tls.enable_0rtt_data", false); + +/** OCSP (Online Certificate Status Protocol) + [1] https://scotthelme.co.uk/revocation-is-broken/ + [2] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ +***/ +/* 1211: enforce OCSP fetching to confirm current validity of certificates + * 0=disabled, 1=enabled (default), 2=enabled for EV certificates only + * OCSP (non-stapled) leaks information about the sites you visit to the CA (cert authority) + * It's a trade-off between security (checking) and privacy (leaking info to the CA) + * [NOTE] This pref only controls OCSP fetching and does not affect OCSP stapling + * [SETTING] Privacy & Security>Security>Certificates>Query OCSP responder servers... + * [1] https://en.wikipedia.org/wiki/Ocsp ***/ +user_pref("security.OCSP.enabled", 1); // [DEFAULT: 1] +/* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail + * [SETUP-WEB] SEC_ERROR_OCSP_SERVER_ERROR + * When a CA cannot be reached to validate a cert, Firefox just continues the connection (=soft-fail) + * Setting this pref to true tells Firefox to instead terminate the connection (=hard-fail) + * It is pointless to soft-fail when an OCSP fetch fails: you cannot confirm a cert is still valid (it + * could have been revoked) and/or you could be under attack (e.g. malicious blocking of OCSP servers) + * [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ + * [2] https://www.imperialviolet.org/2014/04/19/revchecking.html ***/ +user_pref("security.OCSP.require", true); + +/** CERTS / HPKP (HTTP Public Key Pinning) ***/ +/* 1221: disable Windows 8.1's Microsoft Family Safety cert [FF50+] [WINDOWS] + * 0=disable detecting Family Safety mode and importing the root + * 1=only attempt to detect Family Safety mode (don't import the root) + * 2=detect Family Safety mode and import the root + * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21686 ***/ +user_pref("security.family_safety.mode", 0); +/* 1223: enable strict PKP (Public Key Pinning) + * 0=disabled, 1=allow user MiTM (default; such as your antivirus), 2=strict + * [SETUP-WEB] MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE ***/ +user_pref("security.cert_pinning.enforcement_level", 2); +/* 1224: enable CRLite [FF73+] + * 0 = disabled + * 1 = consult CRLite but only collect telemetry + * 2 = consult CRLite and enforce both "Revoked" and "Not Revoked" results + * 3 = consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked" (FF99+, default FF100+) + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985,1753071 + * [2] https://blog.mozilla.org/security/tag/crlite/ ***/ +user_pref("security.remote_settings.crlite_filters.enabled", true); +user_pref("security.pki.crlite_mode", 2); + +/** MIXED CONTENT ***/ +/* 1241: disable insecure passive content (such as images) on https pages ***/ + // user_pref("security.mixed_content.block_display_content", true); // Defense-in-depth (see 1244) +/* 1244: enable HTTPS-Only mode in all windows [FF76+] + * When the top-level is HTTPS, insecure subresources are also upgraded (silent fail) + * [SETTING] to add site exceptions: Padlock>HTTPS-Only mode>On (after "Continue to HTTP Site") + * [SETTING] Privacy & Security>HTTPS-Only Mode (and manage exceptions) + * [TEST] http://example.com [upgrade] + * [TEST] http://httpforever.com/ | http://http.rip [no upgrade] ***/ +user_pref("dom.security.https_only_mode", true); // [FF76+] + // user_pref("dom.security.https_only_mode_pbm", true); // [FF80+] +/* 1245: enable HTTPS-Only mode for local resources [FF77+] ***/ + // user_pref("dom.security.https_only_mode.upgrade_local", true); +/* 1246: disable HTTP background requests [FF82+] + * When attempting to upgrade, if the server doesn't respond within 3 seconds, Firefox sends + * a top-level HTTP request without path in order to check if the server supports HTTPS or not + * This is done to avoid waiting for a timeout which takes 90 seconds + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1642387,1660945 ***/ +user_pref("dom.security.https_only_mode_send_http_background_request", false); + +/** UI (User Interface) ***/ +/* 1270: display warning on the padlock for "broken security" (if 1201 is false) + * Bug: warning padlock not indicated for subresources on a secure page! [2] + * [1] https://wiki.mozilla.org/Security:Renegotiation + * [2] https://bugzilla.mozilla.org/1353705 ***/ +user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true); +/* 1272: display advanced information on Insecure Connection warning pages + * only works when it's possible to add an exception + * i.e. it doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/) + * [TEST] https://expired.badssl.com/ ***/ +user_pref("browser.xul.error_pages.expert_bad_cert", true); + +/*** [SECTION 1400]: FONTS ***/ +user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!"); +/* 1402: limit font visibility (Windows, Mac, some Linux) [FF94+] + * Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts [1], bundled fonts are auto-allowed + * In normal windows: uses the first applicable: RFP (4506) over TP over Standard + * In Private Browsing windows: uses the most restrictive between normal and private + * 1=only base system fonts, 2=also fonts from optional language packs, 3=also user-installed fonts + * [1] https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc ***/ + // user_pref("layout.css.font-visibility.private", 1); + // user_pref("layout.css.font-visibility.standard", 1); + // user_pref("layout.css.font-visibility.trackingprotection", 1); + +/*** [SECTION 1600]: REFERERS + full URI: https://example.com:8888/foo/bar.html?id=1234 + scheme+host+port+path: https://example.com:8888/foo/bar.html + scheme+host+port: https://example.com:8888 + [1] https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/ +***/ +user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!"); +/* 1602: control the amount of cross-origin information to send [FF52+] + * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/ +user_pref("network.http.referer.XOriginTrimmingPolicy", 2); + +/*** [SECTION 1700]: CONTAINERS ***/ +user_pref("_user.js.parrot", "1700 syntax error: the parrot's bit the dust!"); +/* 1701: enable Container Tabs and its UI setting [FF50+] + * [SETTING] General>Tabs>Enable Container Tabs + * https://wiki.mozilla.org/Security/Contextual_Identity_Project/Containers ***/ +user_pref("privacy.userContext.enabled", true); +user_pref("privacy.userContext.ui.enabled", true); +/* 1702: set behavior on "+ Tab" button to display container menu on left click [FF74+] + * [NOTE] The menu is always shown on long press and right click + * [SETTING] General>Tabs>Enable Container Tabs>Settings>Select a container for each new tab ***/ + // user_pref("privacy.userContext.newTabContainerOnLeftClick.enabled", true); + +/*** [SECTION 2000]: PLUGINS / MEDIA / WEBRTC ***/ +user_pref("_user.js.parrot", "2000 syntax error: the parrot's snuffed it!"); +/* 2002: force WebRTC inside the proxy [FF70+] ***/ +user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true); +/* 2003: force a single network interface for ICE candidates generation [FF42+] + * When using a system-wide proxy, it uses the proxy interface + * [1] https://developer.mozilla.org/en-US/docs/Web/API/RTCIceCandidate + * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy ***/ +user_pref("media.peerconnection.ice.default_address_only", true); +/* 2004: force exclusion of private IPs from ICE candidates [FF51+] + * [SETUP-HARDEN] This will protect your private IP even in TRUSTED scenarios after you + * grant device access, but often results in breakage on video-conferencing platforms ***/ + // user_pref("media.peerconnection.ice.no_host", true); +/* 2020: disable GMP (Gecko Media Plugins) + * [1] https://wiki.mozilla.org/GeckoMediaPlugins ***/ + // user_pref("media.gmp-provider.enabled", false); + +/*** [SECTION 2400]: DOM (DOCUMENT OBJECT MODEL) ***/ +user_pref("_user.js.parrot", "2400 syntax error: the parrot's kicked the bucket!"); +/* 2402: prevent scripts from moving and resizing open windows ***/ +user_pref("dom.disable_window_move_resize", true); + +/*** [SECTION 2600]: MISCELLANEOUS ***/ +user_pref("_user.js.parrot", "2600 syntax error: the parrot's run down the curtain!"); +/* 2601: prevent accessibility services from accessing your browser [RESTART] + * [1] https://support.mozilla.org/kb/accessibility-services ***/ +user_pref("accessibility.force_disabled", 1); +/* 2603: remove temp files opened with an external application + * [1] https://bugzilla.mozilla.org/302433 ***/ +user_pref("browser.helperApps.deleteTempFileOnExit", true); +/* 2606: disable UITour backend so there is no chance that a remote page can use it ***/ +user_pref("browser.uitour.enabled", false); + // user_pref("browser.uitour.url", ""); // Defense-in-depth +/* 2608: reset remote debugging to disabled + * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16222 ***/ +user_pref("devtools.debugger.remote-enabled", false); // [DEFAULT: false] +/* 2615: disable websites overriding Firefox's keyboard shortcuts [FF58+] + * 0 (default) or 1=allow, 2=block + * [SETTING] to add site exceptions: Ctrl+I>Permissions>Override Keyboard Shortcuts ***/ + // user_pref("permissions.default.shortcuts", 2); +/* 2616: remove special permissions for certain mozilla domains [FF35+] + * [1] resource://app/defaults/permissions ***/ +user_pref("permissions.manager.defaultsUrl", ""); +/* 2617: remove webchannel whitelist ***/ +user_pref("webchannel.allowObject.urlWhitelist", ""); +/* 2619: use Punycode in Internationalized Domain Names to eliminate possible spoofing + * [SETUP-WEB] Might be undesirable for non-latin alphabet users since legitimate IDN's are also punycoded + * [TEST] https://www.xn--80ak6aa92e.com/ (www.apple.com) + * [1] https://wiki.mozilla.org/IDN_Display_Algorithm + * [2] https://en.wikipedia.org/wiki/IDN_homograph_attack + * [3] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=punycode+firefox + * [4] https://www.xudongz.com/blog/2017/idn-phishing/ ***/ +user_pref("network.IDN_show_punycode", true); +/* 2620: enforce PDFJS, disable PDFJS scripting + * This setting controls if the option "Display in Firefox" is available in the setting below + * and by effect controls whether PDFs are handled in-browser or externally ("Ask" or "Open With") + * [WHY] pdfjs is lightweight, open source, and secure: the last exploit was June 2015 [1] + * It doesn't break "state separation" of browser content (by not sharing with OS, independent apps). + * It maintains disk avoidance and application data isolation. It's convenient. You can still save to disk. + * [NOTE] JS can still force a pdf to open in-browser by bundling its own code + * [SETUP-CHROME] You may prefer a different pdf reader for security/workflow reasons + * [SETTING] General>Applications>Portable Document Format (PDF) + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=pdf.js+firefox ***/ +user_pref("pdfjs.disabled", false); // [DEFAULT: false] +user_pref("pdfjs.enableScripting", false); // [FF86+] +/* 2623: disable permissions delegation [FF73+] + * Currently applies to cross-origin geolocation, camera, mic and screen-sharing + * permissions, and fullscreen requests. Disabling delegation means any prompts + * for these will show/use their correct 3rd party origin + * [1] https://groups.google.com/forum/#!topic/mozilla.dev.platform/BdFOMAuCGW8/discussion ***/ +user_pref("permissions.delegation.enabled", false); +/* 2624: disable middle click on new tab button opening URLs or searches using clipboard [FF115+] */ +user_pref("browser.tabs.searchclipboardfor.middleclick", false); // [DEFAULT: false NON-LINUX] + +/** DOWNLOADS ***/ +/* 2651: enable user interaction for security by always asking where to download + * [SETUP-CHROME] On Android this blocks longtapping and saving images + * [SETTING] General>Downloads>Always ask you where to save files ***/ +user_pref("browser.download.useDownloadDir", false); +/* 2652: disable downloads panel opening on every download [FF96+] ***/ +user_pref("browser.download.alwaysOpenPanel", false); +/* 2653: disable adding downloads to the system's "recent documents" list ***/ +user_pref("browser.download.manager.addToRecentDocs", false); +/* 2654: enable user interaction for security by always asking how to handle new mimetypes [FF101+] + * [SETTING] General>Files and Applications>What should Firefox do with other files ***/ +user_pref("browser.download.always_ask_before_handling_new_types", true); + +/** EXTENSIONS ***/ +/* 2660: lock down allowed extension directories + * [SETUP-CHROME] This will break extensions, language packs, themes and any other + * XPI files which are installed outside of profile and application directories + * [1] https://mike.kaply.com/2012/02/21/understanding-add-on-scopes/ + * [1] https://archive.is/DYjAM (archived) ***/ +user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF] +user_pref("extensions.autoDisableScopes", 15); // [DEFAULT: 15] +/* 2661: disable bypassing 3rd party extension install prompts [FF82+] + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1659530,1681331 ***/ +user_pref("extensions.postDownloadThirdPartyPrompt", false); +/* 2662: disable webextension restrictions on certain mozilla domains (you also need 4503) [FF60+] + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/ + // user_pref("extensions.webextensions.restrictedDomains", ""); + +/*** [SECTION 2700]: ETP (ENHANCED TRACKING PROTECTION) ***/ +user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin' choir invisible!"); +/* 2701: enable ETP Strict Mode [FF86+] + * ETP Strict Mode enables Total Cookie Protection (TCP) + * [NOTE] Adding site exceptions disables all ETP protections for that site and increases the risk of + * cross-site state tracking e.g. exceptions for SiteA and SiteB means PartyC on both sites is shared + * [1] https://blog.mozilla.org/security/2021/02/23/total-cookie-protection/ + * [SETTING] to add site exceptions: Urlbar>ETP Shield + * [SETTING] to manage site exceptions: Options>Privacy & Security>Enhanced Tracking Protection>Manage Exceptions ***/ +user_pref("browser.contentblocking.category", "strict"); +/* 2702: disable ETP web compat features [FF93+] + * [SETUP-HARDEN] Includes skip lists, heuristics (SmartBlock) and automatic grants + * Opener and redirect heuristics are granted for 30 days, see [3] + * [1] https://blog.mozilla.org/security/2021/07/13/smartblock-v2/ + * [2] https://hg.mozilla.org/mozilla-central/rev/e5483fd469ab#l4.12 + * [3] https://developer.mozilla.org/en-US/docs/Web/Privacy/State_Partitioning#storage_access_heuristics ***/ + // user_pref("privacy.antitracking.enableWebcompat", false); +/* 2710: enable state partitioning of service workers [FF96+] ***/ +user_pref("privacy.partition.serviceWorkers", true); // [DEFAULT: true FF105+] +/* 2720: enable APS (Always Partitioning Storage) ***/ +user_pref("privacy.partition.always_partition_third_party_non_cookie_storage", true); // [FF104+] [DEFAULT: true FF109+] +user_pref("privacy.partition.always_partition_third_party_non_cookie_storage.exempt_sessionstorage", false); // [FF105+] [DEFAULT: false FF109+] + +/*** [SECTION 2800]: SHUTDOWN & SANITIZING ***/ +user_pref("_user.js.parrot", "2800 syntax error: the parrot's bleedin' demised!"); +/* 2810: enable Firefox to clear items on shutdown + * [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes | Settings ***/ +user_pref("privacy.sanitize.sanitizeOnShutdown", true); + +/** SANITIZE ON SHUTDOWN: IGNORES "ALLOW" SITE EXCEPTIONS ***/ +/* 2811: set/enforce what items to clear on shutdown (if 2810 is true) [SETUP-CHROME] + * [NOTE] If "history" is true, downloads will also be cleared + * [NOTE] "sessions": Active Logins: refers to HTTP Basic Authentication [1], not logins via cookies + * [1] https://en.wikipedia.org/wiki/Basic_access_authentication ***/ +user_pref("privacy.clearOnShutdown.cache", true); // [DEFAULT: true] +user_pref("privacy.clearOnShutdown.downloads", true); // [DEFAULT: true] +user_pref("privacy.clearOnShutdown.formdata", true); // [DEFAULT: true] +user_pref("privacy.clearOnShutdown.history", true); // [DEFAULT: true] +user_pref("privacy.clearOnShutdown.sessions", true); // [DEFAULT: true] + // user_pref("privacy.clearOnShutdown.siteSettings", false); // [DEFAULT: false] +/* 2812: set Session Restore to clear on shutdown (if 2810 is true) [FF34+] + * [NOTE] Not needed if Session Restore is not used (0102) or it is already cleared with history (2811) + * [NOTE] If true, this prevents resuming from crashes (also see 5008) ***/ + // user_pref("privacy.clearOnShutdown.openWindows", true); + +/** SANITIZE ON SHUTDOWN: RESPECTS "ALLOW" SITE EXCEPTIONS FF103+ ***/ +/* 2815: set "Cookies" and "Site Data" to clear on shutdown (if 2810 is true) [SETUP-CHROME] + * [NOTE] Exceptions: A "cookie" block permission also controls "offlineApps" (see note below). + * serviceWorkers require an "Allow" permission. For cross-domain logins, add exceptions for + * both sites e.g. https://www.youtube.com (site) + https://accounts.google.com (single sign on) + * [NOTE] "offlineApps": Offline Website Data: localStorage, service worker cache, QuotaManager (IndexedDB, asm-cache) + * [WARNING] Be selective with what sites you "Allow", as they also disable partitioning (1767271) + * [SETTING] to add site exceptions: Ctrl+I>Permissions>Cookies>Allow (when on the website in question) + * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Settings ***/ +user_pref("privacy.clearOnShutdown.cookies", true); // Cookies +user_pref("privacy.clearOnShutdown.offlineApps", true); // Site Data + +/** SANITIZE MANUAL: IGNORES "ALLOW" SITE EXCEPTIONS ***/ +/* 2820: reset default items to clear with Ctrl-Shift-Del [SETUP-CHROME] + * This dialog can also be accessed from the menu History>Clear Recent History + * Firefox remembers your last choices. This will reset them when you start Firefox + * [NOTE] Regardless of what you set "downloads" to, as soon as the dialog + * for "Clear Recent History" is opened, it is synced to the same as "history" ***/ +user_pref("privacy.cpd.cache", true); // [DEFAULT: true] +user_pref("privacy.cpd.formdata", true); // [DEFAULT: true] +user_pref("privacy.cpd.history", true); // [DEFAULT: true] +user_pref("privacy.cpd.sessions", true); // [DEFAULT: true] +user_pref("privacy.cpd.offlineApps", false); // [DEFAULT: false] +user_pref("privacy.cpd.cookies", false); + // user_pref("privacy.cpd.downloads", true); // not used, see note above + // user_pref("privacy.cpd.openWindows", false); // Session Restore + // user_pref("privacy.cpd.passwords", false); + // user_pref("privacy.cpd.siteSettings", false); +/* 2822: reset default "Time range to clear" for "Clear Recent History" (2820) + * Firefox remembers your last choice. This will reset the value when you start Firefox + * 0=everything, 1=last hour, 2=last two hours, 3=last four hours, 4=today + * [NOTE] Values 5 (last 5 minutes) and 6 (last 24 hours) are not listed in the dropdown, + * which will display a blank value, and are not guaranteed to work ***/ +user_pref("privacy.sanitize.timeSpan", 0); + +/*** [SECTION 4500]: RFP (RESIST FINGERPRINTING) + RFP covers a wide range of ongoing fingerprinting solutions. + It is an all-or-nothing buy in: you cannot pick and choose what parts you want + [TEST] https://arkenfox.github.io/TZP/tzp.html + + [WARNING] DO NOT USE extensions to alter RFP protected metrics + + 418986 - limit window.screen & CSS media queries (FF41) + 1281949 - spoof screen orientation (FF50) + 1330890 - spoof timezone as UTC0 (FF55) + 1360039 - spoof navigator.hardwareConcurrency as 2 (FF55) + FF56 + 1369303 - spoof/disable performance API + 1333651 - spoof User Agent & Navigator API + version: android version spoofed as ESR + OS: JS spoofed as Windows 10, OS 10.15, Android 10, or Linux | HTTP Headers spoofed as Windows or Android + 1369319 - disable device sensor API + 1369357 - disable site specific zoom + 1337161 - hide gamepads from content + 1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true + 1333641 - reduce fingerprinting in WebSpeech API + FF57 + 1369309 - spoof media statistics + 1382499 - reduce screen co-ordinate fingerprinting in Touch API + 1217290 & 1409677 - enable some fingerprinting resistance for WebGL + 1382545 - reduce fingerprinting in Animation API + 1354633 - limit MediaError.message to a whitelist + FF58+ + 1372073 - spoof/block fingerprinting in MediaDevices API (FF59) + Spoof: enumerate devices as one "Internal Camera" and one "Internal Microphone" + Block: suppresses the ondevicechange event + 1039069 - warn when language prefs are not set to "en*" (also see 0210, 0211) (FF59) + 1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59) + Spoofing mimics the content language of the document. Currently it only supports en-US. + Modifier events suppressed are SHIFT and both ALT keys. Chrome is not affected. + 1337157 - disable WebGL debug renderer info (FF60) + 1459089 - disable OS locale in HTTP Accept-Language headers (ANDROID) (FF62) + 1479239 - return "no-preference" with prefers-reduced-motion (FF63) + 1363508 - spoof/suppress Pointer Events (FF64) + 1492766 - spoof pointerEvent.pointerid (FF65) + 1485266 - disable exposure of system colors to CSS or canvas (FF67) + 1494034 - return "light" with prefers-color-scheme (FF67) + 1564422 - spoof audioContext outputLatency (FF70) + 1595823 - return audioContext sampleRate as 44100 (FF72) + 1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74) + 1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78) + 1506364 - return "no-preference" with prefers-contrast (FF80) + 1653987 - limit font visibility to bundled and "Base Fonts" (Windows, Mac, some Linux) (FF80) + 1461454 - spoof smooth=true and powerEfficient=false for supported media in MediaCapabilities (FF82) + 531915 - use fdlibm's sin, cos and tan in jsmath (FF93, ESR91.1) + 1756280 - enforce navigator.pdfViewerEnabled as true and plugins/mimeTypes as hard-coded values (FF100) + 1692609 - reduce JS timing precision to 16.67ms (previously FF55+ was 100ms) (FF102) + 1422237 - return "srgb" with color-gamut (FF110) + 1794628 - return "none" with inverted-colors (FF114) +***/ +user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs"); +/* 4501: enable privacy.resistFingerprinting + * [SETUP-WEB] RFP can cause some website breakage: mainly canvas, use a site exception via the urlbar + * RFP also has a few side effects: mainly timezone is UTC0, and websites will prefer light theme + * [NOTE] pbmode applies if true and the original pref is false + * [1] https://bugzilla.mozilla.org/418986 ***/ +user_pref("privacy.resistFingerprinting", true); // [FF41+] + // user_pref("privacy.resistFingerprinting.pbmode", true); // [FF114+] +/* 4502: set new window size rounding max values [FF55+] + * [SETUP-CHROME] sizes round down in hundreds: width to 200s and height to 100s, to fit your screen + * [1] https://bugzilla.mozilla.org/1330882 ***/ +user_pref("privacy.window.maxInnerWidth", 1600); +user_pref("privacy.window.maxInnerHeight", 900); +/* 4503: disable mozAddonManager Web API [FF57+] + * [NOTE] To allow extensions to work on AMO, you also need 2662 + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/ +user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // [HIDDEN PREF FF57-108] +/* 4504: enable RFP letterboxing [FF67+] + * Dynamically resizes the inner window by applying margins in stepped ranges [2] + * If you use the dimension pref, then it will only apply those resolutions. + * The format is "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000") + * [SETUP-WEB] This is independent of RFP (4501). If you're not using RFP, or you are but + * dislike the margins, then flip this pref, keeping in mind that it is effectively fingerprintable + * [WARNING] DO NOT USE: the dimension pref is only meant for testing + * [1] https://bugzilla.mozilla.org/1407366 + * [2] https://hg.mozilla.org/mozilla-central/rev/6d2d7856e468#l2.32 ***/ +user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF] + // user_pref("privacy.resistFingerprinting.letterboxing.dimensions", ""); // [HIDDEN PREF] +/* 4505: experimental RFP [FF91+] + * [WARNING] DO NOT USE unless testing, see [1] comment 12 + * [1] https://bugzilla.mozilla.org/1635603 ***/ + // user_pref("privacy.resistFingerprinting.exemptedDomains", "*.example.invalid"); +/* 4506: set RFP's font visibility level (1402) [FF94+] ***/ + // user_pref("layout.css.font-visibility.resistFingerprinting", 1); // [DEFAULT: 1] +/* 4510: disable using system colors + * [SETTING] General>Language and Appearance>Fonts and Colors>Colors>Use system colors ***/ +user_pref("browser.display.use_system_colors", false); // [DEFAULT: false NON-WINDOWS] +/* 4511: enforce non-native widget theme + * Security: removes/reduces system API calls, e.g. win32k API [1] + * Fingerprinting: provides a uniform look and feel across platforms [2] + * [1] https://bugzilla.mozilla.org/1381938 + * [2] https://bugzilla.mozilla.org/1411425 ***/ +user_pref("widget.non-native-theme.enabled", true); // [DEFAULT: true] +/* 4512: enforce links targeting new windows to open in a new tab instead + * 1=most recent window or tab, 2=new window, 3=new tab + * Stops malicious window sizes and some screen resolution leaks. + * You can still right-click a link and open in a new window + * [SETTING] General>Tabs>Open links in tabs instead of new windows + * [TEST] https://arkenfox.github.io/TZP/tzp.html#screen + * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/9881 ***/ +user_pref("browser.link.open_newwindow", 3); // [DEFAULT: 3] +/* 4513: set all open window methods to abide by "browser.link.open_newwindow" (4512) + * [1] https://searchfox.org/mozilla-central/source/dom/tests/browser/browser_test_new_window_from_content.js ***/ +user_pref("browser.link.open_newwindow.restriction", 0); +/* 4520: disable WebGL (Web Graphics Library) + * [SETUP-WEB] If you need it then override it. RFP still randomizes canvas for naive scripts ***/ +user_pref("webgl.disabled", true); + +/*** [SECTION 5000]: OPTIONAL OPSEC + Disk avoidance, application data isolation, eyeballs... +***/ +user_pref("_user.js.parrot", "5000 syntax error: the parrot's taken 'is last bow"); +/* 5001: start Firefox in PB (Private Browsing) mode + * [NOTE] In this mode all windows are "private windows" and the PB mode icon is not displayed + * [NOTE] The P in PB mode can be misleading: it means no "persistent" disk state such as history, + * caches, searches, cookies, localStorage, IndexedDB etc (which you can achieve in normal mode). + * In fact, PB mode limits or removes the ability to control some of these, and you need to quit + * Firefox to clear them. PB is best used as a one off window (Menu>New Private Window) to provide + * a temporary self-contained new session. Close all private windows to clear the PB session. + * [SETTING] Privacy & Security>History>Custom Settings>Always use private browsing mode + * [1] https://wiki.mozilla.org/Private_Browsing + * [2] https://support.mozilla.org/kb/common-myths-about-private-browsing ***/ + // user_pref("browser.privatebrowsing.autostart", true); +/* 5002: disable memory cache + * capacity: -1=determine dynamically (default), 0=none, n=memory capacity in kibibytes ***/ + // user_pref("browser.cache.memory.enable", false); + // user_pref("browser.cache.memory.capacity", 0); +/* 5003: disable saving passwords + * [NOTE] This does not clear any passwords already saved + * [SETTING] Privacy & Security>Logins and Passwords>Ask to save logins and passwords for websites ***/ + // user_pref("signon.rememberSignons", false); +/* 5004: disable permissions manager from writing to disk [FF41+] [RESTART] + * [NOTE] This means any permission changes are session only + * [1] https://bugzilla.mozilla.org/967812 ***/ + // user_pref("permissions.memory_only", true); // [HIDDEN PREF] +/* 5005: disable intermediate certificate caching [FF41+] [RESTART] + * [NOTE] This affects login/cert/key dbs. The effect is all credentials are session-only. + * Saved logins and passwords are not available. Reset the pref and restart to return them ***/ + // user_pref("security.nocertdb", true); +/* 5006: disable favicons in history and bookmarks + * [NOTE] Stored as data blobs in favicons.sqlite, these don't reveal anything that your + * actual history (and bookmarks) already do. Your history is more detailed, so + * control that instead; e.g. disable history, clear history on exit, use PB mode + * [NOTE] favicons.sqlite is sanitized on Firefox close ***/ + // user_pref("browser.chrome.site_icons", false); +/* 5007: exclude "Undo Closed Tabs" in Session Restore ***/ + // user_pref("browser.sessionstore.max_tabs_undo", 0); +/* 5008: disable resuming session from crash + * [TEST] about:crashparent ***/ + // user_pref("browser.sessionstore.resume_from_crash", false); +/* 5009: disable "open with" in download dialog [FF50+] + * Application data isolation [1] + * [1] https://bugzilla.mozilla.org/1281959 ***/ + // user_pref("browser.download.forbid_open_with", true); +/* 5010: disable location bar suggestion types + * [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest ***/ + // user_pref("browser.urlbar.suggest.history", false); + // user_pref("browser.urlbar.suggest.bookmark", false); + // user_pref("browser.urlbar.suggest.openpage", false); + // user_pref("browser.urlbar.suggest.topsites", false); // [FF78+] +/* 5011: disable location bar dropdown + * This value controls the total number of entries to appear in the location bar dropdown ***/ + // user_pref("browser.urlbar.maxRichResults", 0); +/* 5012: disable location bar autofill + * [1] https://support.mozilla.org/kb/address-bar-autocomplete-firefox#w_url-autocomplete ***/ + // user_pref("browser.urlbar.autoFill", false); +/* 5013: disable browsing and download history + * [NOTE] We also clear history and downloads on exit (2811) + * [SETTING] Privacy & Security>History>Custom Settings>Remember browsing and download history ***/ + // user_pref("places.history.enabled", false); +/* 5014: disable Windows jumplist [WINDOWS] ***/ + // user_pref("browser.taskbar.lists.enabled", false); + // user_pref("browser.taskbar.lists.frequent.enabled", false); + // user_pref("browser.taskbar.lists.recent.enabled", false); + // user_pref("browser.taskbar.lists.tasks.enabled", false); +/* 5015: disable Windows taskbar preview [WINDOWS] ***/ + // user_pref("browser.taskbar.previews.enable", false); // [DEFAULT: false] +/* 5016: discourage downloading to desktop + * 0=desktop, 1=downloads (default), 2=custom + * [SETTING] To set your custom default "downloads": General>Downloads>Save files to ***/ + // user_pref("browser.download.folderList", 2); +/* 5017: disable Form Autofill + * If .supportedCountries includes your region (browser.search.region) and .supported + * is "detect" (default), then the UI will show. Stored data is not secure, uses JSON + * [SETTING] Privacy & Security>Forms and Autofill>Autofill addresses + * [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill ***/ + // user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+] + // user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+] +/* 5018: limit events that can cause a pop-up ***/ + // user_pref("dom.popup_allowed_events", "click dblclick mousedown pointerdown"); +/* 5019: disable page thumbnail collection ***/ + // user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF] +/* 5020: disable Windows native notifications and use app notications instead [FF111+] [WINDOWS] ***/ + // user_pref("alerts.useSystemBackend.windows.notificationserver.enabled", false); +/* 5021: disable location bar using search + * Don't leak URL typos to a search engine, give an error message instead + * Examples: "secretplace,com", "secretplace/com", "secretplace com", "secret place.com" + * [NOTE] This does not affect explicit user action such as using search buttons in the + * dropdown, or using keyword search shortcuts you configure in options (e.g. "d" for DuckDuckGo) ***/ + // user_pref("keyword.enabled", false); + +/*** [SECTION 5500]: OPTIONAL HARDENING + Not recommended. Overriding these can cause breakage and performance issues, + they are mostly fingerprintable, and the threat model is practically nonexistent +***/ +user_pref("_user.js.parrot", "5500 syntax error: this is an ex-parrot!"); +/* 5501: disable MathML (Mathematical Markup Language) [FF51+] + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=mathml ***/ + // user_pref("mathml.disabled", true); // 1173199 +/* 5502: disable in-content SVG (Scalable Vector Graphics) [FF53+] + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+svg ***/ + // user_pref("svg.disabled", true); // 1216893 +/* 5503: disable graphite + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+graphite + * [2] https://en.wikipedia.org/wiki/Graphite_(SIL) ***/ + // user_pref("gfx.font_rendering.graphite.enabled", false); +/* 5504: disable asm.js [FF22+] + * [1] http://asmjs.org/ + * [2] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=asm.js + * [3] https://rh0dev.github.io/blog/2017/the-return-of-the-jit/ ***/ + // user_pref("javascript.options.asmjs", false); +/* 5505: disable Ion and baseline JIT to harden against JS exploits + * [NOTE] When both Ion and JIT are disabled, and trustedprincipals + * is enabled, then Ion can still be used by extensions (1599226) + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+jit + * [2] https://microsoftedge.github.io/edgevr/posts/Super-Duper-Secure-Mode/ ***/ + // user_pref("javascript.options.ion", false); + // user_pref("javascript.options.baselinejit", false); + // user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF] +/* 5506: disable WebAssembly [FF52+] + * Vulnerabilities [1] have increasingly been found, including those known and fixed + * in native programs years ago [2]. WASM has powerful low-level access, making + * certain attacks (brute-force) and vulnerabilities more possible + * [STATS] ~0.2% of websites, about half of which are for crytopmining / malvertising [2][3] + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=wasm + * [2] https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly + * [3] https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes ***/ + // user_pref("javascript.options.wasm", false); +/* 5507: disable rendering of SVG OpenType fonts ***/ + // user_pref("gfx.font_rendering.opentype_svg.enabled", false); +/* 5508: disable all DRM content (EME: Encryption Media Extension) + * Optionally hide the UI setting which also disables the DRM prompt + * [SETTING] General>DRM Content>Play DRM-controlled content + * [TEST] https://bitmovin.com/demos/drm + * [1] https://www.eff.org/deeplinks/2017/10/drms-dead-canary-how-we-just-lost-web-what-we-learned-it-and-what-we-need-do-next ***/ + // user_pref("media.eme.enabled", false); + // user_pref("browser.eme.ui.enabled", false); +/* 5509: disable IPv6 if using a VPN + * This is an application level fallback. Disabling IPv6 is best done at an OS/network + * level, and/or configured properly in system wide VPN setups. + * If you see PR_CONNECT_RESET_ERROR, this pref *might* be the cause + * [NOTE] PHP defaults to IPv6 with "localhost". Use "php -S 127.0.0.1:PORT" + * [TEST] https://ipleak.org/ + * [1] https://www.internetsociety.org/tag/ipv6-security/ (Myths 2,4,5,6) ***/ + // user_pref("network.dns.disableIPv6", true); +/* 5510: control when to send a cross-origin referer + * 0=always (default), 1=only if base domains match, 2=only if hosts match + * [NOTE] Will cause breakage: older modems/routers and some sites e.g banks, vimeo, icloud, instagram ***/ + // user_pref("network.http.referer.XOriginPolicy", 2); + +/*** [SECTION 6000]: DON'T TOUCH ***/ +user_pref("_user.js.parrot", "6000 syntax error: the parrot's 'istory!"); +/* 6001: enforce Firefox blocklist + * [WHY] It includes updates for "revoked certificates" + * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/ ***/ +user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true] +/* 6002: enforce no referer spoofing + * [WHY] Spoofing can affect CSRF (Cross-Site Request Forgery) protections ***/ +user_pref("network.http.referer.spoofSource", false); // [DEFAULT: false] +/* 6004: enforce a security delay on some confirmation dialogs such as install, open/save + * [1] https://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/ ***/ +user_pref("security.dialog_enable_delay", 1000); // [DEFAULT: 1000] +/* 6008: enforce no First Party Isolation [FF51+] + * [WARNING] Replaced with network partitioning (FF85+) and TCP (2701), and enabling FPI + * disables those. FPI is no longer maintained except at Tor Project for Tor Browser's config ***/ +user_pref("privacy.firstparty.isolate", false); // [DEFAULT: false] +/* 6009: enforce SmartBlock shims [FF81+] + * In FF96+ these are listed in about:compat + * [1] https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/ ***/ +user_pref("extensions.webcompat.enable_shims", true); // [DEFAULT: true] +/* 6010: enforce no TLS 1.0/1.1 downgrades + * [TEST] https://tls-v1-1.badssl.com:1010/ ***/ +user_pref("security.tls.version.enable-deprecated", false); // [DEFAULT: false] +/* 6011: enforce disabling of Web Compatibility Reporter [FF56+] + * Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla + * [WHY] To prevent wasting Mozilla's time with a custom setup ***/ +user_pref("extensions.webcompat-reporter.enabled", false); // [DEFAULT: false] +/* 6012: enforce Quarantined Domains [FF115+] + * [WHY] https://support.mozilla.org/kb/quarantined-domains */ +user_pref("extensions.quarantinedDomains.enabled", true); // [DEFAULT: true] +/* 6050: prefsCleaner: reset previously active items removed from arkenfox FF102+ ***/ + // user_pref("beacon.enabled", ""); + // user_pref("browser.startup.blankWindow", ""); + // user_pref("browser.newtab.preload", ""); + // user_pref("browser.newtabpage.activity-stream.feeds.discoverystreamfeed", ""); + // user_pref("browser.newtabpage.activity-stream.feeds.snippets", ""); + // user_pref("browser.region.network.url", ""); + // user_pref("browser.region.update.enabled", ""); + // user_pref("browser.ssl_override_behavior", ""); + // user_pref("devtools.chrome.enabled", ""); + // user_pref("dom.disable_beforeunload", ""); + // user_pref("dom.disable_open_during_load", ""); + // user_pref("extensions.formautofill.available", ""); + // user_pref("extensions.formautofill.addresses.supported", ""); + // user_pref("extensions.formautofill.creditCards.available", ""); + // user_pref("extensions.formautofill.creditCards.supported", ""); + // user_pref("middlemouse.contentLoadURL", ""); +/* 6051: prefsCleaner: reset previously active items removed from arkenfox FF115+ ***/ + // user_pref("network.protocol-handler.external.ms-windows-store", ""); + +/*** [SECTION 7000]: DON'T BOTHER ***/ +user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies!"); +/* 7001: disable APIs + * Location-Aware Browsing, Full Screen + * [WHY] The API state is easily fingerprintable. + * Geo is behind a prompt (7002). Full screen requires user interaction ***/ + // user_pref("geo.enabled", false); + // user_pref("full-screen-api.enabled", false); +/* 7002: set default permissions + * Location, Camera, Microphone, Notifications [FF58+] Virtual Reality [FF73+] + * 0=always ask (default), 1=allow, 2=block + * [WHY] These are fingerprintable via Permissions API, except VR. Just add site + * exceptions as allow/block for frequently visited/annoying sites: i.e. not global + * [SETTING] to add site exceptions: Ctrl+I>Permissions> + * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Settings ***/ + // user_pref("permissions.default.geo", 0); + // user_pref("permissions.default.camera", 0); + // user_pref("permissions.default.microphone", 0); + // user_pref("permissions.default.desktop-notification", 0); + // user_pref("permissions.default.xr", 0); // Virtual Reality +/* 7003: disable non-modern cipher suites [1] + * [WHY] Passive fingerprinting. Minimal/non-existent threat of downgrade attacks + * [1] https://browserleaks.com/ssl ***/ + // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); // [DEFAULT: false FF109+] + // user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false); // [DEFAULT: false FF109+] + // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false); + // user_pref("security.ssl3.ecdhe_rsa_aes_256_sha", false); + // user_pref("security.ssl3.rsa_aes_128_gcm_sha256", false); // no PFS + // user_pref("security.ssl3.rsa_aes_256_gcm_sha384", false); // no PFS + // user_pref("security.ssl3.rsa_aes_128_sha", false); // no PFS + // user_pref("security.ssl3.rsa_aes_256_sha", false); // no PFS +/* 7004: control TLS versions + * [WHY] Passive fingerprinting and security ***/ + // user_pref("security.tls.version.min", 3); // [DEFAULT: 3] + // user_pref("security.tls.version.max", 4); +/* 7005: disable SSL session IDs [FF36+] + * [WHY] Passive fingerprinting and perf costs. These are session-only + * and isolated with network partitioning (FF85+) and/or containers ***/ + // user_pref("security.ssl.disable_session_identifiers", true); +/* 7006: onions + * [WHY] Firefox doesn't support hidden services. Use Tor Browser ***/ + // user_pref("dom.securecontext.allowlist_onions", true); // [FF97+] 1382359/1744006 + // user_pref("network.http.referer.hideOnionSource", true); // 1305144 +/* 7007: referers + * [WHY] Only cross-origin referers (1602, 5510) matter ***/ + // user_pref("network.http.sendRefererHeader", 2); + // user_pref("network.http.referer.trimmingPolicy", 0); +/* 7008: set the default Referrer Policy [FF59+] + * 0=no-referer, 1=same-origin, 2=strict-origin-when-cross-origin, 3=no-referrer-when-downgrade + * [WHY] Defaults are fine. They can be overridden by a site-controlled Referrer Policy ***/ + // user_pref("network.http.referer.defaultPolicy", 2); // [DEFAULT: 2] + // user_pref("network.http.referer.defaultPolicy.pbmode", 2); // [DEFAULT: 2] +/* 7010: disable HTTP Alternative Services [FF37+] + * [WHY] Already isolated with network partitioning (FF85+) ***/ + // user_pref("network.http.altsvc.enabled", false); +/* 7011: disable website control over browser right-click context menu + * [WHY] Just use Shift-Right-Click ***/ + // user_pref("dom.event.contextmenu.enabled", false); +/* 7012: disable icon fonts (glyphs) and local fallback rendering + * [WHY] Breakage, font fallback is equivalency, also RFP + * [1] https://bugzilla.mozilla.org/789788 + * [2] https://gitlab.torproject.org/legacy/trac/-/issues/8455 ***/ + // user_pref("gfx.downloadable_fonts.enabled", false); // [FF41+] + // user_pref("gfx.downloadable_fonts.fallback_delay", -1); +/* 7013: disable Clipboard API + * [WHY] Fingerprintable. Breakage. Cut/copy/paste require user + * interaction, and paste is limited to focused editable fields ***/ + // user_pref("dom.event.clipboardevents.enabled", false); +/* 7014: disable System Add-on updates + * [WHY] It can compromise security. System addons ship with prefs, use those ***/ + // user_pref("extensions.systemAddon.update.enabled", false); // [FF62+] + // user_pref("extensions.systemAddon.update.url", ""); // [FF44+] +/* 7015: enable the DNT (Do Not Track) HTTP header + * [WHY] DNT is enforced with Tracking Protection which is used in ETP Strict (2701) ***/ + // user_pref("privacy.donottrackheader.enabled", true); +/* 7016: customize ETP settings + * [WHY] Arkenfox only supports strict (2701) which sets these at runtime ***/ + // user_pref("network.cookie.cookieBehavior", 5); // [DEFAULT: 5 FF103+] + // user_pref("network.http.referer.disallowCrossSiteRelaxingDefault", true); + // user_pref("network.http.referer.disallowCrossSiteRelaxingDefault.top_navigation", true); // [FF100+] + // user_pref("privacy.partition.network_state.ocsp_cache", true); + // user_pref("privacy.query_stripping.enabled", true); // [FF101+] [ETP FF102+] + // user_pref("privacy.trackingprotection.enabled", true); + // user_pref("privacy.trackingprotection.socialtracking.enabled", true); + // user_pref("privacy.trackingprotection.cryptomining.enabled", true); // [DEFAULT: true] + // user_pref("privacy.trackingprotection.fingerprinting.enabled", true); // [DEFAULT: true] +/* 7017: disable service workers + * [WHY] Already isolated with TCP (2701) behind a pref (2710) ***/ + // user_pref("dom.serviceWorkers.enabled", false); +/* 7018: disable Web Notifications + * [WHY] Web Notifications are behind a prompt (7002) + * [1] https://blog.mozilla.org/en/products/firefox/block-notification-requests/ ***/ + // user_pref("dom.webnotifications.enabled", false); // [FF22+] + // user_pref("dom.webnotifications.serviceworker.enabled", false); // [FF44+] +/* 7019: disable Push Notifications [FF44+] + * [WHY] Push requires subscription + * [NOTE] To remove all subscriptions, reset "dom.push.userAgentID" + * [1] https://support.mozilla.org/kb/push-notifications-firefox ***/ + // user_pref("dom.push.enabled", false); +/* 7020: disable WebRTC (Web Real-Time Communication) + * [WHY] Firefox desktop uses mDNS hostname obfuscation and the private IP is never exposed until + * required in TRUSTED scenarios; i.e. after you grant device (microphone or camera) access + * [TEST] https://browserleaks.com/webrtc + * [1] https://groups.google.com/g/discuss-webrtc/c/6stQXi72BEU/m/2FwZd24UAQAJ + * [2] https://datatracker.ietf.org/doc/html/draft-ietf-mmusic-mdns-ice-candidates#section-3.1.1 ***/ + // user_pref("media.peerconnection.enabled", false); + +/*** [SECTION 8000]: DON'T BOTHER: FINGERPRINTING + [WHY] They are insufficient to help anti-fingerprinting and do more harm than good + [WARNING] DO NOT USE with RFP. RFP already covers these and they can interfere +***/ +user_pref("_user.js.parrot", "8000 syntax error: the parrot's crossed the Jordan"); +/* 8001: prefsCleaner: reset items useless for anti-fingerprinting ***/ + // user_pref("browser.display.use_document_fonts", ""); + // user_pref("browser.zoom.siteSpecific", ""); + // user_pref("device.sensors.enabled", ""); + // user_pref("dom.enable_performance", ""); + // user_pref("dom.enable_resource_timing", ""); + // user_pref("dom.gamepad.enabled", ""); + // user_pref("dom.maxHardwareConcurrency", ""); + // user_pref("dom.w3c_touch_events.enabled", ""); + // user_pref("dom.webaudio.enabled", ""); + // user_pref("font.system.whitelist", ""); + // user_pref("general.appname.override", ""); + // user_pref("general.appversion.override", ""); + // user_pref("general.buildID.override", ""); + // user_pref("general.oscpu.override", ""); + // user_pref("general.platform.override", ""); + // user_pref("general.useragent.override", ""); + // user_pref("media.navigator.enabled", ""); + // user_pref("media.ondevicechange.enabled", ""); + // user_pref("media.video_stats.enabled", ""); + // user_pref("media.webspeech.synth.enabled", ""); + // user_pref("ui.use_standins_for_native_colors", ""); + // user_pref("webgl.enable-debug-renderer-info", ""); + +/*** [SECTION 9000]: NON-PROJECT RELATED ***/ +user_pref("_user.js.parrot", "9000 syntax error: the parrot's cashed in 'is chips!"); +/* 9001: disable welcome notices ***/ +user_pref("browser.startup.homepage_override.mstone", "ignore"); +/* 9002: disable General>Browsing>Recommend extensions/features as you browse [FF67+] ***/ +user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false); +user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false); +/* 9003: disable What's New toolbar icon [FF69+] ***/ +user_pref("browser.messaging-system.whatsNewPanel.enabled", false); +/* 9004: disable search terms [FF110+] + * [SETTING] Search>Search Bar>Use the address bar for search and navigation>Show search terms instead of URL... ***/ +user_pref("browser.urlbar.showSearchTerms.enabled", false); + +/*** [SECTION 9999]: DEPRECATED / REMOVED / LEGACY / RENAMED + Documentation denoted as [-]. Items deprecated prior to FF91 have been archived at [1] + [1] https://github.com/arkenfox/user.js/issues/123 +***/ +user_pref("_user.js.parrot", "9999 syntax error: the parrot's shuffled off 'is mortal coil!"); +/* ESR102.x still uses all the following prefs +// [NOTE] replace the * with a slash in the line above to re-enable active ones +// FF103 +// 2801: delete cookies and site data on exit - replaced by sanitizeOnShutdown* (2810) + // 0=keep until they expire (default), 2=keep until you close Firefox + // [SETTING] Privacy & Security>Cookies and Site Data>Delete cookies and site data when Firefox is closed + // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1681493,1681495,1681498,1759665,1764761 +user_pref("network.cookie.lifetimePolicy", 2); +// 6012: disable SHA-1 certificates + // [-] https://bugzilla.mozilla.org/1766687 + // user_pref("security.pki.sha1_enforcement_level", 1); // [DEFAULT: 1] +// FF114 +// 2816: set cache to clear on exit [FF96+] + // [NOTE] We already disable disk cache (1001) and clear on exit (2811) which is more robust + // [1] https://bugzilla.mozilla.org/1671182 + // [-] https://bugzilla.mozilla.org/1821651 + // user_pref("privacy.clearsitedata.cache.enabled", true); +// 4505: experimental RFP [FF91+] + // [-] https://bugzilla.mozilla.org/1824235 + // user_pref("privacy.resistFingerprinting.testGranularityMask", 0); +// 5017: disable Form Autofill heuristics + // Heuristics controls Form Autofill on forms without @autocomplete attributes + // [-] https://bugzilla.mozilla.org/1829670 + // user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+] +// FF115 + // 7001: disable offline cache (appCache) + // [NOTE] appCache storage capability was removed in FF90 + // [-] https://bugzilla.mozilla.org/1677718 + // user_pref("browser.cache.offline.enable", false); +// ***/ + +/* END: internal custom pref to test for syntax errors ***/ +user_pref("_user.js.parrot", "SUCCESS: No no he's not dead, he's, he's restin'!"); |