Hi @kwisomialbert. I use the following settings in user.js, but automatic functionality is mostly broken. When the item is commented with // auto means that it works automatically (in my set up); // set means that you need to open and edit in auto:config; // add means you need to create the setting in auto:config (aka, hidden setting -boolean for true false, string otherwise); // default means it is the default value (in my set up). Be aware that the settings are fit to my usage, and will likely break many sites/functions I do not care for, meaning, use at your own risk. The list includes settings mostly derived from user.js for FF52-9 and FF53, plus some provided by users here, such as @VistaLover, @XPerceniol, @Sampei.Nihira, @Mathwiz and others. Hope it helps.
//******************************************************************************
TO INCLUDE IN PROFILE
//******************************************************************************
// CUSTOM
user_pref("browser.cache.disk.parent_directory","CHOOSE-FOLDER IN RAM-TEMP"); // set
user_pref("general.useragent.vendor", ""); // add
user_pref("general.useragent.vendorSub", ""); // add
user_pref("general.useragent.compatMode.firefox", true); // auto REVIEW false
user_pref("general.useragent.compatMode.gecko", true); // auto, REVIEW false
user_pref("general.useragent.override", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"); // auto
user_pref("general.useragent.override.addons.palemoon.org","Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Goanna/4.8 Firefox/68.0 PaleMoon/29.4.0.2"); // set
user_pref("general.useragent.override.addons.basilisk-browser.org","Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:68.0) Gecko/20100101 Goanna/4.8 Firefox/68.0 Basilisk/52.9.2021.07.19"); // set
user_pref("general.useragent.compatMode.version", "78.0"); // auto, default is 52.0
// MULTIPROCESS
user_pref("browser.tabs.remote.force-enable", true); // set
user_pref("browser.tabs.remote.autostart", true); // auto
user_pref("browser.tabs.remote.separateFileUriProcess", true); // add
user_pref("dom.ipc.processCount", 4); // set
user_pref("dom.ipc.process.webLargeAllocation", 4); // set
user_pref("extensions.e10sBlocksEnabling", false); // set
user_pref("extensions.e10sMultiBlockedByAddons", false); // add
//user_pref("browser.tabs.remote.autostart.2",); // reset if created
// ACCELERATION AND GRAPHICS - GOOD FOR MULTIPROCESS IF YOU GOT THE JUICE
user_pref("layers.acceleration.force-enabled", true); // add
user_pref("layers.force-active", true); // set
user_pref("layers.acceleration.enabled", true); // default
user_pref("layers.async-pan-zoom.enabled", true); // default
user_pref("layers.offmainthreadcomposition.async-animations", true); // default
user_pref("layers.offmainthreadcomposition.enabled", true); // add
user_pref("layers.async-video.enabled", true); // add
user_pref("html5.offmainthread", true); // default
user_pref("layout.frame_rate.precise", true); // set review
user_pref("gfx.direct2d.disabled", false); // default
user_pref("gfx.font_rendering.directwrite.force-enabled", true); // set
// MEDIA PEERCONNECTION, WebRTC
user_pref("camera.control.face_detection.enabled", false); // default
user_pref("canvas.capturestream.enabled", false); // set
user_pref("dom.imagecapture.enabled", false); // default
user_pref("media.peerconnection.enabled", false); // set
user_pref("media.peerconnection.ice.default_address_only", true); // set
user_pref("media.peerconnection.ice.no_host", true); // set,
user_pref("media.peerconnection.ice.proxy_only", true); // set
user_pref("media.peerconnection.identity.enabled", false); // set
user_pref("media.peerconnection.identity.timeout", 1); // set
user_pref("media.peerconnection.turn.disable", true); // set
user_pref("media.peerconnection.use_document_iceservers", false); // set
user_pref("media.peerconnection.video.enabled", false); // set
user_pref("media.webspeech.recognition.enable", false); // default
user_pref("media.webspeech.synth.enabled", false); // set
user_pref("media.getusermedia.audiocapture.enabled", false); // default
user_pref("media.getusermedia.browser.enabled", false); // set
user_pref("media.getusermedia.screensharing.enabled", false); // set
user_pref("media.getusermedia.screensharing.allowed_domains", "127.0.0.1"); // set
user_pref("media.autoplay.enabled", true); // default
user_pref("media.eme.enabled", false); // default
user_pref("media.block-autoplay-until-in-foreground", false); // set review
user_pref("media.mediasource.enabled", true); // default review
user_pref("media.mediasource.mp4.enabled", true); // default review
user_pref("media.mediasource.webm.audio.true", false); // default review
user_pref("media.mediasource.webm.enabled", false); // default review
user_pref("media.navigator.enabled", false); // set
user_pref("media.navigator.video.enabled", false); // set
// WEBGL
user_pref("webgl.disable-extensions", true); // set
user_pref("webgl.disable-fail-if-major-performance-caveat", true); // set
user_pref("webgl.disable-wgl", true); // set
user_pref("webgl.disabled", true); // set
user_pref("webgl.dxgl.enabled", false); // set
user_pref("webgl.enable-webgl2", false); // set
user_pref("webgl.min_capability_mode", true); // set
user_pref("pdfjs.enableWebGL", false); // default
user_pref("webgl.enable-debug-renderer-info", false); // default
// COMMON SECURITY
user_pref("browser.selfsupport.url", "127.0.0.1"); // set
user_pref("browser.offline-apps.notify", true); // default
user_pref("browser.display.use_document_fonts", 1); // default
user_pref("browser.download.manager.quitBehavior", 2)" - // add
user_pref("browser.tabs.crashReporting.sendReport", false); // set
user_pref("captivedetect.canonicalURL","127.0.0.1"); // set
user_pref("captivedetect.maxRetryCount", 0); // set
user_pref("captivedetect.maxWaitingTime", 0); // set
user_pref("captivedetect.pollingTime", 0); // set
user_pref("network.captive-portal-service.enabled", false); // set
user_pref("javascript.options.strict", true); // set
user_pref("javascript.options.wasm", false); //set
user_pref("javascript.options.asmjs", true); // default
user_pref("javascript.options.asyncstack", false); // default
user_pref("javascript.options.ion.inlining", true); // default
user_pref("offline-apps.allow_by_default", false); // set
user_pref("offline-apps.quota.warn",1); // set
user_pref("plugins.enumerable_names,""); // add
user_pref("privacy.firstparty.isolate", true); // set
user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // add
user_pref("privacy.userContext.enabled", true); // set container
user_pref("privacy.userContext.ui.enabled", true); // set container
user_pref("privacy.userContext.longPressBehavior", 2); // add container
user_pref("security.csp.enable", true); // default bookmarlets REVIEW
user_pref("security.csp.enableStrictDynamic", true); // default bookmarlets REVIEW
user_pref("security.csp.experimentalEnabled", true); // add
user_pref("toolkit.telemetry.archive.enabled, false); // set
user_pref("toolkit.telemetry.reportingpolicy.firstRun, false); // set
// user_pref("svg.disabled", true); // breaks fails linkedin review
// EXTENSIONS AND WIDGETS SECURITY
user_pref("beacon.enabled", false); // set
user_pref("browser.search.update", false); // set
user_pref("device.sensors.enabled", false); // set
user_pref("devtools.chrome.enabled", false); // default
user_pref("devtools.webide.autoinstallADBHelper", false); // set
user_pref("devtools.webide.autoinstallFxdtAdapters", false); // set
user_pref("devtools.debugger.remote-enabled", false); // default
user_pref("devtools.webide.enabled", false); // set
user_pref("dom.archivereader.enabled", false); // default
user_pref("dom.gamepad.enabled", false); // set
user_pref("dom.idle-observers-api.enabled", false); // set
user_pref("dom.IntersectionObserver.enabled", false); // set
user_pref("dom.ipc.shims.enabledWarnings", false); // default
user_pref("dom.netinfo.enabled", false); // default
user_pref("dom.push.enabled", false); // set
user_pref("dom.push.connection.enabled", false); // set
user_pref("dom.push.serverURL", "127.0.0.1"); // set
user_pref("dom.push.userAgentID", ""); // default
user_pref("dom.w3c_touch_events.enabled", 0); //set from 2
user_pref("dom.webnotifications.enabled", false); // set
user_pref("dom.workers.enabled", false); // set
user_pref("extensions.blocklist.enabled", false); // set
user_pref("extensions.blocklist.url", "127.0.0.1"); //set
user_pref("extensions.getAddons.cache.enabled", false); // default
user_pref("extensions.update.enabled", true); // default
user_pref("extensions.update.autoUpdateDefault", false); // set
user_pref("extensions.webservice.discoverURL", "http://127.0.0.1"); // set
user_pref("extensions.webextensions.keepUuidOnUninstall", false); // default
user_pref("lightweightThemes.update.enabled", false); // set
user_pref("mathml.disabled", true); // default
user_pref("network.jar.open-unsafe-types", false); // default
user_pref("pdfjs.disabled", true); // set
// SSL
user_pref("security.nocertdb", true); // add
user_pref("breakpad.reportURL", "127.0.0.1"); // set
user_pref("browser.ssl_override_behavior", 1); // set
user_pref("browser.xul.error_pages.enabled, true); // default
user_pref("browser.xul.error_pages.expert_bad_cert", true); // set
user_pref("security.block_script_with_wrong_mime", true); // default
user_pref("security.OCSP.enabled", 0); // set
user_pref("security.OCSP.require", false); // default verify (options)
user_pref("security.ssl.enable_ocsp_stapling", true); // default
user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true); // set
user_pref("security.cert_pinning.enforcement_level", 1); // default
user_pref("security.mixed_content.block_active_content", true); // default
user_pref("security.mixed_content.block_display_content", true); // set
user_pref("security.mixed_content.send_hsts_priming", true); // default
user_pref("security.pki.sha1_enforcement_level", 3); // default
user_pref("security.ssl.errorReporting.url", "127.0.0.1"); //add
user_pref("security.ssl.require_safe_negotiation", true); // set
user_pref("security.tls.version.fallback-limit", 3); // default
user_pref("security.tls.version.min", 3); // set
user_pref("security.ssl.disable_session_identifiers", true); // add
user_pref("security.ssl3.dhe_rsa_aes_128_sha", false); // default
user_pref("security.ssl3.dhe_rsa_aes_256_sha", false); // default
user_pref("security.ssl3.rsa_des_ede3_sha", false); // default
// NETWORK
user_pref("network.allow-experiments", false); // set
user_pref("network.dns.disablePrefetch", true); // set
user_pref("network.dns.disablePrefetchFromHTTPS", true); // add
user_pref("network.http.altsvc.enabled", false); // set review
user_pref("network.http.altsvc.oe", false); // set review
user_pref("network.http.sendRefererHeader", 1); // set
user_pref("network.http.redirection-limit", 10); // set
user_pref("network.http.spdy.enabled", false); // set review
user_pref("network.http.spdy.enabled.deps", false); // set review
user_pref("network.http.spdy.enabled.http2", false); // set review
user_pref("network.http.speculative-parallel-limit", 0); // set
user_pref("network.IDN_show_punycode", true); // set
user_pref("network.IDN.restriction_profile", "high"); // set review
user_pref("network.predictor.enable-prefetch", false); // default
user_pref("network.predictor.enabled", false); // set
user_pref("network.prefetch-next", false); // set
user_pref("network.protocol-handler.external.ms-windows-store", false); //set
user_pref("security.sri.enable", true); // default
user_pref("webchannel.allowObject.urlWhitelist", "127.0.0.1");
// user_pref("network.jar.block-remote-files", true);
// user_pref("network.manage-offline-status", false);
// IP AND GEO
user_pref("geo.enabled", false); // set
user_pref("geo.wifi.uri", "127.0.0.1"); // set
user_pref("geo.wifi.xhr.timeout", 1); // set
user_pref("geo.wifi.logging.enabled", false); // add
user_pref("geo.security.allowinsecure", false); // add
user_pref("browser.search.geoip.url", "127.0.0.1"); // add
user_pref("browser.search.geoip.timeout", 1); // add
user_pref("browser.search.geoSpecificDefaults", false); // add
user_pref("browser.search.geoSpecificDefaults.url", "127.0.0.1"); // add
user_pref("browser.geolocation.warning.infoURL", "127.0.0.1); // set
// PRIVACY AND HISTORY
user_pref("browser.fixup.hide_user_pass", true); // default
user_pref("browser.download.hide_plugins_without_extensions", false); // set
user_pref("browser.download.manager.addToRecentDocs", false); // set
user_pref("browser.pagethumbnails.capturing_disabled", true); // set
user_pref("browser.helperApps.deleteTempFileOnExit", true); // default
user_pref("privacy.clearOnShutdown.extensions-dta", true); // set ALL TO TRUE
user_pref("privacy.clearOnShutdown.extensions-tabmix", true); // set
user_pref("privacy.clearOnShutdown.offlineApps", true); // set
user_pref("privacy.clearOnShutdown.openWindows", true); // set
user_pref("privacy.clearOnShutdown.siteSettings", true); // set
user_pref("privacy.clearOnShutdown.siteSettings", true); // auto
user_pref("privacy.cpd.extensions-dta", true); // set ALL CPD TO TRUE
user_pref("privacy.cpd.offlineApps", true); // set
user_pref("privacy.cpd.openWindows", true); // set
user_pref("privacy.cpd.passwords", true); // set
user_pref("privacy.cpd.siteSettings", true); // set
user_pref("privacy.sanitize.sanitizeOnShutdown", true); // set
user_pref("privacy.sanitize.timeSpan", 0); // set
user_pref("security.ask_for_password", 0); // set
user_pref("security.insecure_field_warning.contextual.enabled", true); // default
user_pref("signon.autofillForms", false); // default
user_pref("signon.autofillForms.http", false); // default
user_pref("signon.formlessCapture.enabled", false); // set
user_pref("signon.rememberSignons", false); // set
user_pref("signon.storeWhenAutocompleteOff", true); // default
// INTERFACE COMMON
user_pref("accessibility.blockautorefresh", true); // set
user_pref("accessibility.typeaheadfind", true); // auto
user_pref("accessibility.typeaheadfind.flashBar:, 0); //set
user_pref("browser.ctrlTab.previews", true); // auto
user_pref("browser.download.folderList", 1); // default
user_pref("browser.search.countryCode", "US"); // add
user_pref("browser.search.region", "US"); // add
user_pref("browser.search.searchEnginesURL", "127.0.0.1"); // add
user_pref("browser.shell.checkDefaultBrowser", false);
user_pref("clipboard.autocopy", false); // default
user_pref("dom.allow_cut_copy", false); // add
user_pref("dom.event.contextmenu.enabled", false); // set for all
user_pref("dom.event.clipboardevents.enabled", false); // set
user_pref("dom.beforeAfterKeyboardEvent.enabled", false); // default
user_pref("intl.accept_languages", "en-US, en"); // auto
user_pref("layout.spellcheckDefault", 2); // set
user_pref("javascript.use_US_english_locale", true); // auto
// INTERFACE TABS
user_pref("browser.link.open_newwindow", 3); // default
user_pref("browser.link.open_newwindow.restriction", 0); // set by tabmix?
user_pref("browser.link.open_newwindow.override.external", 3); // auto
user_pref("browser.tabs.animate", false); // auto tabmix)
user_pref("browser.tabs.closeWindowWithLastTab", false); // auto tabmix)
user_pref("browser.tabs.loadBookmarksInBackground", true); // auto tabmix)
user_pref("browser.tabs.loadDivertedInBackground", true); // auto tabmix)
user_pref("browser.tabs.loadInBackground", true); // default
user_pref("browser.tabs.insertRelatedAfterCurrent", true); // default
user_pref("browser.tabs.selectOwnerOnClose", true); // default
user_pref("browser.tabs.warnOnClose", false); // set
user_pref("browser.tabs.warnOnOpen", false); // set
user_pref("browser.tabs.warnOnCloseOtherTabs", false); // set
// INTERFACE STARTUP
user_pref("browser.newtab.preload", true); // default REVIEW
user_pref("browser.newtabpage.introShown", false); // default
user_pref("browser.newtabpage.enabled", false); // set
user_pref("browser.newtabpage.directory.ping", "127.0.0.1"); // set
user_pref("browser.newtabpage.directory.source", "127.0.0.1"); // set
user_pref("browser.slowStartup.notificationDisabled", true); // set
user_pref("browser.slowStartup.maxSamples", 0); // set
user_pref("browser.slowStartup.samples", 0); // set
user_pref("browser.startup.homepage_override.buildID", "20110715024533"); // set
user_pref("browser.startup.homepage","about:newtab"); // set
user_pref("browser.startup.page", 1); // defautl
user_pref("privacy.usercontext.about_newtab_segregation.enabled", true); //set
user_pref("startup.homepage_welcome_url", ""); // default
user_pref("startup.homepage_welcome_url.additional", ""); // default
user_pref("startup.homepage_override_url", ""); // default
// INTERFACE OTHERS
user_pref("alerts.showFavicons", true); // set
user_pref("browser.backspace_action", 0); // default
user_pref("browser.bookmarks.max_backups", 0); // set
user_pref("browser.bookmarks.showRecentlyBookmarked", false); // set
user_pref("browser.chrome.site_icons", true); // default
user_pref("browser.chrome.favicons", true); // default
user_pref("browser.download.useDownloadDir", true); // default
user_pref("browser.download.forbid_open_with", false); // default
user_pref("browser.migrate.automigrate.enabled", false); // default
user_pref("browser.shell.shortcutFavicons", true); // default
user_pref("browser.urlbar.clickSelectsAll", true); // default
user_pref("browser.urlbar.doubleClickSelectsAll", false); // default
user_pref("browser.fullscreen.animate", false); // set
user_pref("dom.disable_beforeunload", true); // set
user_pref("full-screen-api.enabled", true); // default
user_pref("full-screen-api.warning.delay", 0); // default
user_pref("full-screen-api.warning.timeout", 0); // default
user_pref("general.useragent.locale", "en-US"); // default
user_pref("intl.locale.matchOS", false); // default
user_pref("middlemouse.contentLoadURL", false); // default
user_pref("keyword.enabled", true); // default
user_pref("view_source.tab", true); // default
// INTERFACE URL AND SEARCH
user_pref("browser.fixup.alternate.enabled", true); // default
user_pref("browser.search.suggest.enabled", true); // default
user_pref("browser.urlbar.autocomplete.enabled", true); // default
user_pref("browser.urlbar.maxRichResults", 20); // set
user_pref("browser.urlbar.suggest.history", true); // default
user_pref("browser.urlbar.suggest.bookmark", true); // default
user_pref("browser.urlbar.suggest.openpage", true); // default
user_pref("browser.urlbar.suggest.searches", true); // set
user_pref("browser.urlbar.trimURLs", false); // set
user_pref("browser.urlbar.userMadeSearchSuggestionsChoice", true); // set
user_pref("browser.taskbar.lists.enabled", true); // default
user_pref("browser.taskbar.lists.frequent.enabled", true); // default
user_pref("browser.taskbar.lists.recent.enabled", false); // default
user_pref("browser.taskbar.lists.tasks.enabled", true); //set
user_pref("browser.taskbar.previews.enable", false); // default
// TROUBLESOME SETTINGS
user_pref("network.dns.blockDotOnion", true); // default, false with TOR
user_pref("javascript.enabled", true); // default, false if not using noscript-umatrix
user_pref("network.proxy.socks_remote_dns", true); // set
user_pref("privacy.resistFingerprinting", false); // add, but makes you unique with no randomness
user_pref("browser.eme.ui.enabled", true); // default, false impedes DRM
user_pref("canvas.poisondata", true); // set instead of privacy.resistFingerprinting
user_pref("layout.css.visited_links_enabled", true); // default, false if paranoid
user_pref("dom.serviceWorkers.enabled", true); // set (false breaks some addons)
user_pref("media.eme.apiVisible", true); // default, false breaks some media sites
user_pref("security.ssl3.dhe_rsa_camellia_128_sha", true); // false breaks too many sites
user_pref("security.ssl3.dhe_rsa_camellia_256_sha", true); // false breaks too many sites
user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", true); // false breaks too many sites
user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false); // false breaks too many sites
user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", true); // false breaks too many sites
user_pref("security.ssl3.ecdhe_rsa_aes_256_sha, true); // false breaks too many sites
user_pref("security.ssl3.rsa_aes_128_sha, false); // false breaks too many sites
user_pref("security.ssl3.rsa_aes_256_gcm_sha384, true); // false breaks too many sites
user_pref("security.ssl3.rsa_aes_256_sha, false); // false breaks too many sites
user_pref("security.ssl3.rsa_aes_256_sha256, true); // false breaks too many sites
user_pref("security.ssl3.rsa_camellia_128_sha", true); // false breaks too many sites
user_pref("security.ssl3.rsa_camellia_256_sha", true); // false breaks too many sites