experimental_user.js

/*
	Custom Firefox settings for enhanced privacy, security, and performance
	Format credit: Jeremy Neale (remy1)

	Betterfox 2.0
	Version: 132

	Installation:

	-> Go to about:support in Firefox URL and open the profile directory
	-> Place this user.js file in this directory and restart Firefox

*/

/**
 * Choose which features to enable/disable
 * Be sure to review the optional categories
 */

var generalPreferences = true;

var disableTelemetry = true;

var trackingProtection = true;

var securityEnhancements = true;

var performanceOptimizations = true;

// OPTIONAL - strict tracking protection and related settings
var advancedPrivacy = false;

// OPTIONAL - tighter security
var advancedSecurity = false;

// OPTIONAL - GPU and other performance settings
var advancedPerformance = false;

// OPTIONAL - adjust scrolling on Windows and Linux
var betterScrolling = false;

// OPTIONAL - space for your custom overrides
var customOverrides = false;

function main() {
    if (generalPreferences) {
        applyGeneralPreferences();
    }

    if (disableTelemetry) {
        applyDisableTelemetry();
    }

    if (trackingProtection) {
        applyTrackingProtection();
    }

    if (securityEnhancements) {
        applySecurityEnhancements();
    }

    if (performanceOptimizations) {
        applyPerformance();
    }

    if (advancedPrivacy) {
        applyAdvancedPrivacy();
    }

    if (advancedSecurity) {
        applyAdvancedSecurity();
    }

    if (advancedPerformance) {
        applyAdvancedPerformance();
    }

    if (betterScrolling) {
        applyBetterScrolling();
    }

    if (customOverrides) {
        applyOverrides();
    }
}

// -------------------------------------------------------------------------------

function applyGeneralPreferences()
{
	user_pref("browser.privatebrowsing.vpnpromourl", "");
	user_pref("extensions.getAddons.showPane", false);
	user_pref("extensions.htmlaboutaddons.recommendations.enabled", false);
	user_pref("browser.discovery.enabled", false);
	user_pref("browser.shell.checkDefaultBrowser", 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.preferences.moreFromMozilla", false);
	user_pref("browser.aboutConfig.showWarning", false);
	user_pref("browser.aboutwelcome.enabled", false);
	user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
	user_pref("browser.compactmode.show", true);
	user_pref("full-screen-api.warning.timeout", 0);
	user_pref("browser.bookmarks.openInTabClosesMenu", false); // false on macOS
	user_pref("browser.tabs.loadBookmarksInTabs", true); // force bookmarks to open in a new tab, not the current tab
	user_pref("findbar.highlightAll", true);
	user_pref("browser.startup.homepage_override.mstone", "ignore"); // What's New page after updates; master switch
	user_pref("view_source.wrap_long_lines", true);  // wrap source lines
	user_pref("devtools.debugger.ui.editor-wrapping", true);  // wrap lines in devtools
	user_pref("layout.word_select.eat_space_to_next_word", false); // do not select the space next to a word when selecting a word
    user_pref("browser.search.update", false); // do not update opensearch engines

	// hide weather and top site shortcuts on New Tab
	user_pref("browser.newtabpage.activity-stream.showWeather", false);
	user_pref("browser.newtabpage.activity-stream.feeds.topsites", false);

	// do not show Pocket on New Tab
	user_pref("extensions.pocket.enabled", false);
	user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);

    // URL bar enhancements
    user_pref("browser.search.separatePrivateDefault.ui.enabled", true);
	user_pref("browser.urlbar.update2.engineAliasRefresh", true);
	user_pref("browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar", false); // use NTP search box for search
	user_pref("browser.urlbar.trimHttps", true);
	user_pref("browser.urlbar.untrimOnUserInteraction.featureGate", true);
	user_pref("browser.urlbar.quicksuggest.enabled", false);
	user_pref("browser.urlbar.suggest.quicksuggest.nonsponsored", false);
    user_pref("browser.urlbar.suggest.quicksuggest.sponsored", false); 
	user_pref("browser.urlbar.groupLabels.enabled", false);
	user_pref("browser.formfill.enable", false); // Remember search and form history
	user_pref("browser.urlbar.suggest.calculator", true);
	user_pref("browser.urlbar.unitConversion.enabled", true);
	user_pref("browser.urlbar.trending.featureGate", false);
}


// -------------------------------------------------------------------------------

function applyDisableTelemetry()
{
	// telemetry
	user_pref("datareporting.policy.dataSubmissionEnabled", false);
	user_pref("datareporting.healthreport.uploadEnabled", false);
	user_pref("toolkit.telemetry.unified", false);
	user_pref("toolkit.telemetry.enabled", false);
	user_pref("toolkit.telemetry.server", "data:,");
	user_pref("toolkit.telemetry.archive.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.bhrPing.enabled", false);
	user_pref("toolkit.telemetry.firstShutdownPing.enabled", false);
	user_pref("toolkit.telemetry.coverage.opt-out", true);
	user_pref("toolkit.coverage.opt-out", true);
	user_pref("toolkit.coverage.endpoint.base", "");
	user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
	user_pref("browser.newtabpage.activity-stream.telemetry", false);

	// experiments
	user_pref("app.shield.optoutstudies.enabled", false);
	user_pref("app.normandy.enabled", false);
	user_pref("app.normandy.api_url", "");
	user_pref("breakpad.reportURL", "");

	// crash reports
	user_pref("browser.tabs.crashReporting.sendReport", false);
	user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false);
	user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // true by default on NIGHTLY

	// detection
	user_pref("captivedetect.canonicalURL", "");
	user_pref("network.captive-portal-service.enabled", false);
	user_pref("network.connectivity-service.enabled", false);
}


// -------------------------------------------------------------------------------

function applyTrackingProtection()
{   
	// prevent what you type from going to Google by default
	user_pref("browser.search.suggest.enabled", false);

	// disable certain permissions that are annoying
	user_pref("permissions.default.desktop-notification", 2); // notifications
	user_pref("permissions.default.geo", 2); // location

	// trim referers
	user_pref("network.http.referer.XOriginTrimmingPolicy", 1);

	// disable speculative connections
	// not very helpful if you use an adblocker
	user_pref("network.dns.disablePrefetch", true);
	user_pref("network.dns.disablePrefetchFromHTTPS", true);
	user_pref("network.prefetch-next", false);
	user_pref("network.predictor.enabled", false);
	user_pref("network.predictor.enable-prefetch", false);
}


// -------------------------------------------------------------------------------

function applySecurityEnhancements()
{
	user_pref("browser.uitour.enabled", false);
	user_pref("security.OCSP.enabled", 0);
	user_pref("security.remote_settings.crlite_filters.enabled", true);
	user_pref("security.pki.crlite_mode", 2);
	user_pref("security.tls.enable_0rtt_data", false);
	user_pref("dom.security.https_first", true);
	user_pref("network.auth.subresource-http-auth-allow", 1);
	user_pref("signon.formlessCapture.enabled", false);
	user_pref("network.IDN_show_punycode", true);
	user_pref("extensions.enabledScopes", 5);
	user_pref("browser.safebrowsing.downloads.remote.enabled", false);
	user_pref("browser.download.start_downloads_in_tmp_dir", true);
	user_pref("browser.helperApps.deleteTempFileOnExit", true);
}


// -------------------------------------------------------------------------------

function applyPerformance()
{
	user_pref("browser.sessionstore.interval", 60000); // save session every 1 minute in case of crash
	user_pref("network.http.max-connections", 1800);
	user_pref("network.http.max-persistent-connections-per-server", 10);
	user_pref("network.http.max-urgent-start-excessive-connections-per-host", 5);
	user_pref("network.http.pacing.requests.enabled", false);

	// cache optimizations
	user_pref("browser.cache.disk.enable", false);
	user_pref("network.http.rcwn.enabled", false);
	user_pref("browser.privatebrowsing.forceMediaMemoryCache", true);
	user_pref("media.memory_cache_max_size", 65536);
}


// -------------------------------------------------------------------------------

/**
 * OPTIONAL: Strict ETP, more referer trimming, DRM, and more
 */
function applyAdvancedPrivacy()
{
    // enforce Strict ETP
	user_pref("browser.contentblocking.category", "strict");

	// uncomment to allow embedded social posts on webpages
	//user_pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com");
	//user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com");

    // disable remembering logins, addresses, and payment information
    user_pref("signon.rememberSignons", false);
	user_pref("extensions.formautofill.addresses.enabled", false);
	user_pref("extensions.formautofill.creditCards.enabled", false);

    // disable Firefox Sync
	user_pref("identity.fxaccounts.enabled", false);
	user_pref("browser.firefox-view.feature-tour", "{\"screen\":\"\",\"complete\":true}");

	// uncomment to enable search suggestions in the URL bar
    // if you use DuckDuckGo, Brave Search, Kagi, etc.
	//user_pref("browser.search.suggest.enabled", true);

	// control how much referrer information to send across origins
	// 1=scheme+host+port+path (BF default), 2=scheme+host+port
	user_pref("network.http.referer.XOriginTrimmingPolicy", 2);

	// uncomment to disable geolocation services
	//user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
	//user_pref("geo.provider.use_corelocation", false); // [MAC]
	//user_pref("geo.provider.use_geoclue", false); // [LINUX]

    // Sanitize on Close
    // uncomment to delete browsing data on shutdown
	//user_pref("privacy.sanitize.sanitizeOnShutdown", true);
	user_pref("privacy.clearOnShutdown_v2.cache", true); // DEFAULT
	user_pref("privacy.clearOnShutdown_v2.cookiesAndStorage", true); // DEFAULT
	// change to true to clear browsing history on shutdown
	user_pref("privacy.clearOnShutdown_v2.historyFormDataAndDownloads", false);

    // DRM
	// uncomment both prefs to disable DRM
	//user_pref("media.eme.enabled", false);
	//user_pref("browser.eme.ui.enabled", false);

    // DoH
    // uncomment to enforce DNS-over-HTTPS (DoH)
    //user_pref("network.trr.mode", 2); // use 3 for max protection

	// edit the address to use your own, if desired
	//user_pref("network.trr.uri", "https://dns.dnswarden.com/00000000000000000000048"); // Hagezi Light + TIF
    user_pref("network.trr.confirmationNS", "skip"); // skip TRR confirmation request

	//user_pref("browser.bookmarks.max_backups", 0); // must manually back-up

    // auto-decline cookie banners
    //user_pref("cookiebanners.service.mode", 1);
    //user_pref("cookiebanners.service.mode.privateBrowsing", 1);

    // global privacy control (GPC)
    //user_pref("privacy.globalprivacycontrol.enabled", true);
}

// -------------------------------------------------------------------------------

/**
 * OPTIONAL: Enable features like...
 */
function applyAdvancedSecurity()
{
	// PREF: HTTPS-only mode
	user_pref("dom.security.https_only_mode", true);
	user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);
    //user_pref("dom.security.https_only_mode_send_http_background_request", false); // 90s timeout

    // change to 1 to allow MiTM (such as your antivirus)
    user_pref("security.cert_pinning.enforcement_level", 2);

    // PREF: enable hybrid post-quantum key exchange
    user_pref("security.tls.enable_kyber", true);
    user_pref("network.http.http3.enable_kyber", true);

    // PREF: remove special permissions for certain mozilla domains
    user_pref("permissions.manager.defaultsUrl", "");
    //user_pref("extensions.webextensions.restrictedDomains", "");
}


// -------------------------------------------------------------------------------

function applyAdvancedPerformance()
{
    //user_pref("gfx.canvas.accelerated", true); // DEFAULT NON-WINDOWS; enable if using a dedicated GPU
	user_pref("gfx.canvas.accelerated.cache-items", 4096);
	user_pref("gfx.canvas.accelerated.cache-size", 512);
	user_pref("gfx.content.skia-font-cache-size", 20);
	user_pref("image.mem.decode_bytes_at_a_time", 32768);
    user_pref("network.ssl_tokens_cache_capacity", 10240);
    user_pref("network.buffer.cache.count", 128);

	user_pref("dom.enable_web_task_scheduling", true);
	user_pref("layout.css.grid-template-masonry-value.enabled", true);
    
    // disable Accessibility features
    user_pref("accessibility.force_disabled", 1);
 
    // set DNS expiration time
    //user_pref("network.dnsCacheExpiration", 3600); // 1 hour; enable if not using DoH
}

// -------------------------------------------------------------------------------

/**
 * OPTIONAL: Improve scrolling [Windows and sometimes Linux]
 */
function applyBetterScrolling()
{
	// adjust this number to between 10-40
	user_pref("mousewheel.min_line_scroll_amount", 10); // default=5

    user_pref("apz.overscroll.enabled", true); // DEFAULT NON-LINUX
    user_pref("general.smoothScroll", true); // DEFAULT
    user_pref("general.smoothScroll.mouseWheel.durationMinMS", 80); // default=50
    user_pref("general.smoothScroll.currentVelocityWeighting", "0.15"); // default=.25
    user_pref("general.smoothScroll.stopDecelerationWeighting", "0.6"); // default=.4
    user_pref("general.smoothScroll.msdPhysics.enabled", false); // [FF122+ Nightly]
}


// -------------------------------------------------------------------------------

/**
 * OPTIONAL: Add your custom override prefs to this section
 */
function applyOverrides()
{
	//user_pref("browser.tabs.hoverPreview.enabled”, false); // disable tab previews
	//user_pref("browser.toolbars.bookmarks.visibility", "never"); // always hide bookmark bar
	//user_pref("browser.zoom.full", false); // text-only zoom, not all elements on page
	//user_pref("ui.key.menuAccessKey", 0); // remove underlined characters from various settings
	//user_pref("general.autoScroll", false); // disable unintentional behavior for middle click
	//user_pref("ui.SpellCheckerUnderlineStyle", 1); // dots for spell check errors
	//user_pref("reader.parse-on-load.enabled", false); // disable reader mode
	//user_pref("devtools.accessibility.enabled", false); // removes un-needed "Inspect Accessibility Properties" on right-click
}


// -------------------------------------------------------------------------------

// run the script
main();