foxgirl-settings/dist/docs/settings/general.md

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---
title: General
---
## `browser.onboarding.notification.finished`
Status: **locked**
Value: `true`
*Onboarding tour disabled because of included telemetry*
## `browser.onboarding.tour.onboarding-tour-customize.completed`
Status: **locked**
Value: `true`
## `browser.onboarding.tour.onboarding-tour-performance.completed`
Status: **locked**
Value: `true`
## `devtools.onboarding.telemetry.logged`
Status: **locked**
Value: `false`
## `services.sync.engine.addresses.available`
Status: **locked**
Value: `false`
## `browser.bookmarks.restore_default_bookmarks`
Status: **locked**
Value: `false`
## `pdfjs.previousHandler.alwaysAskBeforeHandling`
Status: **locked**
Value: `true`
## `pdfjs.enabledCache.state`
Status: **locked**
Value: `false`
*Caching for integrated PDF*
## `pref.general.disable_button.default_browser`
Status: **locked**
Value: `false`
## `pref.privacy.disable_button.view_passwords`
Status: **locked**
Value: `false`
## `identity.mobilepromo.android`
Status: **locked**
Value: `""`
## `extensions.systemAddon.update.url`
Status: **locked**
Value: `""`
## `datareporting.healthreport.infoURL`
Status: **locked**
Value: `""`
## `browser.urlbar.daysBeforeHidingSuggestionsPrompt`
Status: **locked**
Value: `0`
## `browser.urlbar.searchSuggestionsChoice`
Status: **locked**
Value: `false`
## `browser.urlbar.timesBeforeHidingSuggestionsHint`
Status: **locked**
Value: `0`
## `browser.shell.didSkipDefaultBrowserCheckOnFirstRun`
Status: **locked**
Value: `true`
## `app.feedback.baseURL`
Status: **locked**
Value: `""`
## `app.normandy.enabled`
Status: **locked**
Value: `false`
## `app.normandy.api_url`
Status: **locked**
Value: `""`
## `app.normandy.first_run`
Status: **locked**
Value: `false`
## `app.normandy.user_id`
Status: **locked**
Value: `""`
## `app.releaseNotesURL`
Status: **locked**
Value: `""`
## `app.update.auto`
Status: **locked**
Value: `false`
## `extensions.update.autoUpdateDefault`
Status: **unlocked**
Value: `false`
## `app.update.staging.enabled`
Status: **locked**
Value: `false`
## `app.update.silent`
Status: **locked**
Value: `false`
## `app.update.lastUpdateTime.telemetry_modules_ping`
Status: **locked**
Value: `0`
## `app.update.url.details`
Status: **locked**
Value: `"https://gitlab.com/librewolf-community/browser"`
## `app.update.url.manual`
Status: **locked**
Value: `"https://gitlab.com/librewolf-community/browser"`
## `app.vendorURL`
Status: **locked**
Value: `""`
## `breakpad.reportURL`
Status: **locked**
Value: `""`
## `browser.chrome.errorReporter.submitUrl`
Status: **locked**
Value: `""`
## `browser.chrome.errorReporter.enabled`
Status: **locked**
Value: `false`
## `browser.ping-centre.staging.endpoint`
Status: **locked**
Value: `""`
## `browser.ping-centre.telemetry`
Status: **locked**
Value: `false`
## `browser.safebrowsing.id`
Status: **locked**
Value: `""`
*Google Safe Browsing (blocks dangerous and deceptive contents)*
## `browser.safebrowsing.provider.google4.pver`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.mozilla.pver`
Status: **locked**
Value: `""`
## `browser.safebrowsing.allowOverride`
Status: **locked**
Value: `false`
## `browser.safebrowsing.blockedURIs.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.remote.block_dangerous`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.remote.block_dangerous_host`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.remote.block_potentially_unwanted`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.remote.block_uncommon`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.remote.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.downloads.remote.url`
Status: **locked**
Value: `""`
## `browser.safebrowsing.malware.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.passwords.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.phishing.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.provider.google4.advisoryURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.dataSharing.enabled`
Status: **locked**
Value: `false`
## `browser.safebrowsing.provider.google4.dataSharingURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.gethashURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.lists`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.reportMalwareMistakeURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.reportPhishMistakeURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.reportURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.updateURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.lastupdatetime`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google4.nextupdatetime`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.advisoryURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.gethashURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.lastupdatetime`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.lists`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.nextupdatetime`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.pver`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.reportMalwareMistakeURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.reportPhishMistakeURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.reportURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.google.updateURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.mozilla.gethashURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.mozilla.lastupdatetime`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.mozilla.nextupdatetime`
Status: **locked**
Value: `""`
## `browser.safebrowsing.provider.mozilla.updateURL`
Status: **locked**
Value: `""`
## `browser.safebrowsing.reportPhishURL`
Status: **locked**
Value: `""`
## `browser.search.suggest.enabled`
Status: **locked**
Value: `false`
## `captivedetect.canonicalURL`
Status: **locked**
Value: `""`
## `datareporting.policy.firstRunURL`
Status: **locked**
Value: `""`
## `devtools.devedition.promo.url`
Status: **locked**
Value: `""`
## `devtools.devices.url`
Status: **locked**
Value: `""`
## `devtools.gcli.imgurUploadURL`
Status: **locked**
Value: `""`
## `devtools.gcli.jquerySrc`
Status: **locked**
Value: `""`
## `devtools.gcli.underscoreSrc`
Status: **locked**
Value: `""`
## `devtools.telemetry.supported_performance_marks`
Status: **locked**
Value: `""`
## `devtools.telemetry.tools.opened.version`
**Unused Setting**
Status: **locked**
Value: `""`
*Fix ESR Devtools*
## `dom.battery.enabled`
Status: **locked**
Value: `false`
## `dom.permissions.enabled`
Status: **locked**
Value: `false`
## `dom.popup_maximum`
Status: **locked**
Value: `4`
*Maximum popups that may be launched at the same time*
## `dom.registerProtocolHandler.insecure.enabled`
Status: **locked**
Value: `true`
## `extensions.blocklist.detailsURL`
Status: **locked**
Value: `""`
## `extensions.blocklist.itemURL`
Status: **locked**
Value: `""`
## `extensions.blocklist.url`
Status: **locked**
Value: `""`
*Block list url disabled*
## `extensions.update.background.url`
Status: **unlocked**
Value: `""`
## `extensions.getAddons.showPane`
Status: **unlocked**
Value: `false`
## `extensions.webservice.discoverURL`
Status: **locked**
Value: `""`
## `gecko.handlerService.schemes.mailto.0.uriTemplate`
Status: **locked**
Value: `""`
## `gecko.handlerService.schemes.mailto.1.uriTemplate`
Status: **locked**
Value: `""`
## `gecko.handlerService.schemes.webcal.0.uriTemplate`
Status: **locked**
Value: `""`
## `geo.enabled`
Status: **locked**
Value: `false`
## `geo.wifi.uri`
Status: **locked**
Value: `""`
## `geo.provider.ms-windows-location`
Status: **locked**
Value: `false`
*Disable using the OS's geolocation service: Windows*
## `geo.provider.use_corelocation`
Status: **locked**
Value: `false`
*Disable using the OS's geolocation service: Mac*
## `geo.provider.use_gpsd`
Status: **locked**
Value: `false`
*Disable using the OS's geolocation service: Linux*
## `identity.fxaccounts.auth.uri`
Status: **locked**
Value: `""`
## `identity.fxaccounts.remote.oauth.uri`
Status: **locked**
Value: `""`
## `identity.fxaccounts.remote.profile.uri`
Status: **locked**
Value: `""`
## `identity.mobilepromo.ios`
Status: **locked**
Value: `""`
## `remote.enabled`
Status: **locked**
Value: `false`
## `remote.force-local`
Status: **locked**
Value: `true`
## `remote.log.level`
Status: **locked**
Value: `"Info"`
## `layout.css.visited_links_enabled`
Status: **locked**
Value: `false`
## `lpbmode.enabled`
Status: **locked**
Value: `true`
## `mailnews.messageid_browser.url`
Status: **locked**
Value: `""`
## `mailnews.mx_service_url`
Status: **locked**
Value: `""`
## `network.predictor.enabled`
Status: **locked**
Value: `false`
*Disable predictor / prefetching*
## `network.predictor.cleaned-up`
Status: **locked**
Value: `true`
## `network.predictor.enable-prefetch`
Status: **locked**
Value: `false`
## `network.connectivity-service.enabled`
Status: **locked**
Value: `false`
## `network.connectivity-service.IPv6.url`
Status: **locked**
Value: `"http://0.0.0.0"`
## `network.connectivity-service.IPv4.url`
Status: **locked**
Value: `"http://0.0.0.0"`
## `network.connectivity-service.DNSv6.domain`
Status: **locked**
Value: `""`
## `network.connectivity-service.DNSv4.domain`
Status: **locked**
Value: `""`
## `plugins.crash.supportUrl`
Status: **locked**
Value: `""`
## `services.sync.clients.lastSync`
Status: **locked**
Value: `"0"`
## `services.sync.clients.lastSyncLocal`
Status: **locked**
Value: `"0"`
## `services.sync.declinedEngines`
Status: **locked**
Value: `""`
## `services.sync.enabled`
Status: **locked**
Value: `false`
## `services.sync.globalScore`
Status: **locked**
Value: `0`
## `services.sync.jpake.serverURL`
Status: **locked**
Value: `""`
## `services.sync.migrated`
Status: **locked**
Value: `true`
## `services.sync.nextSync`
Status: **locked**
Value: `0`
## `services.sync.prefs.sync.browser.safebrowsing.downloads.enabled`
Status: **locked**
Value: `false`
## `services.sync.prefs.sync.browser.safebrowsing.malware.enabled`
Status: **locked**
Value: `false`
## `services.sync.prefs.sync.browser.safebrowsing.passwords.enabled`
Status: **locked**
Value: `false`
## `services.sync.prefs.sync.browser.safebrowsing.phishing.enabled`
Status: **locked**
Value: `false`
## `services.sync.serverURL`
Status: **locked**
Value: `""`
## `services.sync.tabs.lastSync`
Status: **locked**
Value: `"0"`
## `services.sync.tabs.lastSyncLocal`
Status: **locked**
Value: `"0"`
## `sync.enabled`
Status: **locked**
Value: `false`
## `sync.jpake.serverURL`
Status: **locked**
Value: `""`
## `sync.serverURL`
Status: **locked**
Value: `""`
## `toolkit.crashreporter.infoURL`
Status: **locked**
Value: `""`
## `toolkit.telemetry.archive.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.updatePing.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.bhrPing.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.cachedClientID`
Status: **locked**
Value: `""`
## `toolkit.telemetry.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.firstShutdownPing.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.hybridContent.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.infoURL`
Status: **locked**
Value: `""`
## `toolkit.telemetry.newProfilePing.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.previousBuildID`
Status: **locked**
Value: `""`
## `toolkit.telemetry.prompted`
Status: **locked**
Value: `2`
## `toolkit.telemetry.rejected`
Status: **locked**
Value: `true`
## `toolkit.telemetry.reportingpolicy.firstRun`
Status: **locked**
Value: `false`
## `toolkit.telemetry.server`
Status: **locked**
Value: `"data:,"`
## `toolkit.telemetry.server_owner`
Status: **locked**
Value: `""`
## `toolkit.telemetry.shutdownPingSender.enabled`
Status: **locked**
Value: `false`
*Disable telemetry*
## `toolkit.telemetry.unified`
Status: **locked**
Value: `false`
## `toolkit.telemetry.coverage.opt-out`
Status: **locked**
Value: `true`
*Disable telemetry*
## `toolkit.telemetry.ecosystemtelemetry.enabled`
Status: **locked**
Value: `false`
## `webextensions.storage.sync.serverURL`
Status: **locked**
Value: `""`
## `extensions.screenshots.upload-disabled`
Status: **locked**
Value: `true`
## `network.http.referer.trimmingPolicy`
Status: **locked**
Value: `0`
*Referer: ALL: control the amount of information to send*
## `browser.tabs.closeTabByDblclick`
Status: **locked**
Value: `true`
*Close tab*
## `datareporting.healthreport.uploadEnabled`
Status: **locked**
Value: `false`
*Disable collection/sending of the health report (healthreport.sqlite*)*
### References
[https://support.mozilla.org/en-US/kb/firefox-health-report-understand-your-browser-perf](https://support.mozilla.org/en-US/kb/firefox-health-report-understand-your-browser-perf)
[https://gecko.readthedocs.org/en/latest/toolkit/components/telemetry/telemetry/preferences.html](https://gecko.readthedocs.org/en/latest/toolkit/components/telemetry/telemetry/preferences.html)
## `datareporting.policy.dataSubmissionEnabled`
Status: **locked**
Value: `false`
## `dom.event.contextmenu.enabled`
Status: **locked**
Value: `false`
*Disable right-click menu manipulation via JavaScript (disabled)*
## `dom.event.clipboardevents.enabled`
Status: **locked**
Value: `false`
*Disable clipboard event detection (onCut/onCopy/onPaste) via Javascript*
### References
[https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/dom.event.clipboardevents.enabled](https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/dom.event.clipboardevents.enabled)
## `network.IDN_show_punycode`
Status: **locked**
Value: `true`
*Force Punycode for Internationalized Domain Names*
### References
[http://kb.mozillazine.org/Network.IDN_show_punycode](http://kb.mozillazine.org/Network.IDN_show_punycode)
[https://www.xudongz.com/blog/2017/idn-phishing/](https://www.xudongz.com/blog/2017/idn-phishing/)
[https://wiki.mozilla.org/IDN_Display_Algorithm](https://wiki.mozilla.org/IDN_Display_Algorithm)
[https://en.wikipedia.org/wiki/IDN_homograph_attack](https://en.wikipedia.org/wiki/IDN_homograph_attack)
[https://www.mozilla.org/en-US/security/advisories/mfsa2017-02/](https://www.mozilla.org/en-US/security/advisories/mfsa2017-02/)
## `extensions.pocket.enabled`
Status: **locked**
Value: `false`
*Disable Pocket*
### References
[https://support.mozilla.org/en-US/kb/save-web-pages-later-pocket-firefox](https://support.mozilla.org/en-US/kb/save-web-pages-later-pocket-firefox)
[https://github.com/pyllyukko/user.js/issues/143](https://github.com/pyllyukko/user.js/issues/143)
## `extensions.pocket.site`
Status: **locked**
Value: `""`
## `extensions.pocket.oAuthConsumerKey`
Status: **locked**
Value: `""`
## `extensions.pocket.api`
Status: **locked**
Value: `""`
## `browser.aboutHomeSnippets.updateUrl`
Status: **locked**
Value: `""`
*Disable downloading homepage snippets/messages from Mozilla*
### References
[https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_mozilla-content](https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_mozilla-content)
[https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Service](https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Service)
## `general.buildID.override`
Status: **locked**
Value: `"20100101"`
*Don't reveal build ID*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=583181](https://bugzilla.mozilla.org/show_bug.cgi?id=583181)
## `browser.startup.homepage_override.buildID`
Status: **locked**
Value: `"20100101"`
*Don't reveal build ID*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=583181](https://bugzilla.mozilla.org/show_bug.cgi?id=583181)
## `browser.send_pings`
Status: **locked**
Value: `false`
*Disable pinging URIs specified in HTML <a> ping= attributes*
### References
[http://kb.mozillazine.org/Browser.send_pings](http://kb.mozillazine.org/Browser.send_pings)
## `browser.send_pings.require_same_host`
Status: **locked**
Value: `true`
*When browser pings are enabled, only allow pinging the origin page's host*
### References
[http://kb.mozillazine.org/Browser.send_pings.require_same_host](http://kb.mozillazine.org/Browser.send_pings.require_same_host)
## `browser.cache.offline.enable`
Status: **locked**
Value: `false`
*Do not download URLs for the offline cache*
### References
[http://kb.mozillazine.org/Browser.cache.offline.enable](http://kb.mozillazine.org/Browser.cache.offline.enable)
## `network.prefetch-next`
Status: **locked**
Value: `false`
*Disable prefetching of <link rel='next'> URLs*
### References
[http://kb.mozillazine.org/Network.prefetch-next](http://kb.mozillazine.org/Network.prefetch-next)
[https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#Is_there_a_preference_to_disable_link_prefetching.3F](https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#Is_there_a_preference_to_disable_link_prefetching.3F)
## `network.http.speculative-parallel-limit`
Status: **locked**
Value: `0`
*Disable speculative pre-connections*
### References
[https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_speculative-pre-connections](https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_speculative-pre-connections)
[https://bugzilla.mozilla.org/show_bug.cgi?id=814169](https://bugzilla.mozilla.org/show_bug.cgi?id=814169)
## `media.peerconnection.enabled`
Status: **locked**
Value: `false`
## `dom.enable_performance`
Status: **locked**
Value: `false`
## `dom.enable_performance_navigation_timing`
Status: **locked**
Value: `false`
*Disable DOM timing API*
### References
[https://wiki.mozilla.org/Security/Reviews/Firefox/NavigationTimingAPI](https://wiki.mozilla.org/Security/Reviews/Firefox/NavigationTimingAPI)
[https://www.w3.org/TR/navigation-timing/#privacy](https://www.w3.org/TR/navigation-timing/#privacy)
## `dom.enable_user_timing`
Status: **locked**
Value: `false`
*Make sure the User Timing API does not provide a new high resolution timestamp*
### References
[https://trac.torproject.org/projects/tor/ticket/16336](https://trac.torproject.org/projects/tor/ticket/16336)
[https://www.w3.org/TR/2013/REC-user-timing-20131212/#privacy-security](https://www.w3.org/TR/2013/REC-user-timing-20131212/#privacy-security)
## `dom.webaudio.enabled`
Status: **locked**
Value: `false`
*Disable Web Audio API*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=1288359](https://bugzilla.mozilla.org/show_bug.cgi?id=1288359)
## `geo.wifi.logging.enabled`
Status: **locked**
Value: `true`
*When geolocation is enabled, don't log geolocation requests to the console*
## `beacon.enabled`
Status: **locked**
Value: `false`
*Disable 'beacon' asynchronous HTTP transfers (used for analytics)*
### References
[https://developer.mozilla.org/en-US/docs/Web/API/navigator.sendBeacon](https://developer.mozilla.org/en-US/docs/Web/API/navigator.sendBeacon)
## `media.webspeech.recognition.enable`
Status: **locked**
Value: `false`
*Disable speech recognition*
### References
[https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html](https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html)
[https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognition](https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognition)
[https://wiki.mozilla.org/HTML5_Speech_API](https://wiki.mozilla.org/HTML5_Speech_API)
## `dom.vr.enabled`
Status: **locked**
Value: `false`
*Disable virtual reality devices APIs*
### References
[https://developer.mozilla.org/en-US/Firefox/Releases/36#Interfaces.2FAPIs.2FDOM](https://developer.mozilla.org/en-US/Firefox/Releases/36#Interfaces.2FAPIs.2FDOM)
[https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API≈](https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API≈)
## `dom.vibrator.enabled`
Status: **locked**
Value: `false`
*Disable vibrator API*
## `browser.search.region`
Status: **locked**
Value: `"US"`
*Disable GeoIP lookup on your address to set default search engine region*
### References
[https://trac.torproject.org/projects/tor/ticket/16254](https://trac.torproject.org/projects/tor/ticket/16254)
[https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine](https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine)
## `browser.search.geoip.url`
Status: **locked**
Value: `""`
## `browser.search.geoSpecificDefaults.url`
Status: **locked**
Value: `""`
## `browser.search.geoSpecificDefaults`
Status: **locked**
Value: `false`
*Don't use Mozilla-provided location-specific search engines*
## `browser.urlbar.trimURLs`
Status: **locked**
Value: `false`
*Don't trim HTTP from URLs in the address bar*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=665580](https://bugzilla.mozilla.org/show_bug.cgi?id=665580)
## `browser.fixup.alternate.enabled`
Status: **locked**
Value: `false`
*Don't try to guess domain names when entering an invalid domain name in URL bar*
### References
[http://www-archive.mozilla.org/docs/end-user/domain-guessing.html](http://www-archive.mozilla.org/docs/end-user/domain-guessing.html)
## `browser.fixup.hide_user_pass`
Status: **locked**
Value: `true`
*Strip password from 'user:password@...' URLs*
### References
[https://github.com/pyllyukko/user.js/issues/290#issuecomment-303560851](https://github.com/pyllyukko/user.js/issues/290#issuecomment-303560851)
## `network.manage-offline-status`
Status: **locked**
Value: `false`
*Don't monitor OS online/offline connection state*
### References
[https://trac.torproject.org/projects/tor/ticket/18945](https://trac.torproject.org/projects/tor/ticket/18945)
## `security.fileuri.strict_origin_policy`
Status: **locked**
Value: `true`
*Set File URI Origin Policy*
### References
[http://kb.mozillazine.org/Security.fileuri.strict_origin_policy](http://kb.mozillazine.org/Security.fileuri.strict_origin_policy)
## `gfx.font_rendering.opentype_svg.enabled`
Status: **locked**
Value: `false`
*Disable SVG in OpenType fonts*
### References
[https://wiki.mozilla.org/SVGOpenTypeFonts](https://wiki.mozilla.org/SVGOpenTypeFonts)
[https://github.com/iSECPartners/publications/tree/master/reports/Tor%20Browser%20Bundle](https://github.com/iSECPartners/publications/tree/master/reports/Tor%20Browser%20Bundle)
## `network.protocol-handler.warn-external-default`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.http`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.https`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.javascript`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.moz-extension`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.ftp`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.file`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.about`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.chrome`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.blob`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.external.data`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose-all`
Status: **locked**
Value: `false`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.http`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.https`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.javascript`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.moz-extension`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.ftp`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.file`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.about`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.chrome`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.blob`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `network.protocol-handler.expose.data`
Status: **locked**
Value: `true`
*Enable only whitelisted URL protocol handlers*
## `security.dialog_enable_delay`
Status: **locked**
Value: `700`
*Ensure there is a security delay when installing add-ons (milliseconds)*
### References
[http://kb.mozillazine.org/Disable_extension_install_delay_-_Firefox](http://kb.mozillazine.org/Disable_extension_install_delay_-_Firefox)
[http://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/](http://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/)
## `extensions.getAddons.cache.enabled`
Status: **unlocked**
Value: `false`
*Opt-out of add-on metadata updates*
### References
[https://blog.mozilla.org/addons/how-to-opt-out-of-add-on-metadata-updates/](https://blog.mozilla.org/addons/how-to-opt-out-of-add-on-metadata-updates/)
## `lightweightThemes.update.enabled`
Status: **locked**
Value: `false`
*Opt-out of theme (Persona) updates*
### References
[https://support.mozilla.org/t5/Firefox/how-do-I-prevent-autoamtic-updates-in-a-50-user-environment/td-p/144287](https://support.mozilla.org/t5/Firefox/how-do-I-prevent-autoamtic-updates-in-a-50-user-environment/td-p/144287)
## `lightweightThemes.persisted.headerURL`
Status: **locked**
Value: `false`
## `lightweightThemes.persisted.footerURL`
Status: **locked**
Value: `false`
## `plugin.state.flash`
Status: **locked**
Value: `0`
*Disable Flash Player NPAPI plugin*
### References
[http://kb.mozillazine.org/Flash_plugin](http://kb.mozillazine.org/Flash_plugin)
## `dom.ipc.plugins.flash.subprocess.crashreporter.enabled`
Status: **locked**
Value: `false`
*Disable sending Flash Player crash reports*
## `dom.ipc.plugins.reportCrashURL`
Status: **locked**
Value: `false`
*When Flash Player crash reports are enabled, don't send the visited URL in the crash report*
## `shumway.disabled`
Status: **locked**
Value: `true`
*Disable Shumway (Mozilla Flash renderer)*
### References
[https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Shumway](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Shumway)
## `plugin.state.libgnome-shell-browser-plugin`
Status: **locked**
Value: `0`
*Disable Gnome Shell Integration NPAPI plugin*
## `plugins.click_to_play`
Status: **locked**
Value: `true`
*Enable click-to-play plugin*
### References
[https://wiki.mozilla.org/Firefox/Click_To_Play](https://wiki.mozilla.org/Firefox/Click_To_Play)
[https://blog.mozilla.org/security/2012/10/11/click-to-play-plugins-blocklist-style/](https://blog.mozilla.org/security/2012/10/11/click-to-play-plugins-blocklist-style/)
## `plugin.sessionPermissionNow.intervalInMinutes`
Status: **locked**
Value: `0`
## `extensions.update.enabled`
Status: **unlocked**
Value: `false`
*Update addons automatically*
### References
[https://blog.mozilla.org/addons/how-to-turn-off-add-on-updates/](https://blog.mozilla.org/addons/how-to-turn-off-add-on-updates/)
## `extensions.blocklist.enabled`
Status: **locked**
Value: `false`
*Enable add-on and certificate blocklists (OneCRL) from Mozilla*
## `extensions.systemAddon.update.enabled`
Status: **locked**
Value: `false`
*Disable system add-on updates (hidden & always-enabled add-ons from Mozilla)*
## `devtools.webide.enabled`
Status: **locked**
Value: `false`
*Disable WebIDE Web Debug*
### References
[https://trac.torproject.org/projects/tor/ticket/16222](https://trac.torproject.org/projects/tor/ticket/16222)
[https://developer.mozilla.org/docs/Tools/WebIDE](https://developer.mozilla.org/docs/Tools/WebIDE)
## `devtools.webide.autoinstallADBExtension`
Status: **locked**
Value: `false`
## `devtools.remote.adb.extensionURL`
Status: **locked**
Value: `""`
## `devtools.remote.adb.extensionID`
Status: **locked**
Value: `""`
## `devtools.debugger.force-local`
Status: **locked**
Value: `true`
*Disable remote debugging*
### References
[https://developer.mozilla.org/en-US/docs/Tools/Remote_Debugging/Debugging_Firefox_Desktop](https://developer.mozilla.org/en-US/docs/Tools/Remote_Debugging/Debugging_Firefox_Desktop)
[https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox#Advanced_settings](https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox#Advanced_settings)
## `network.allow-experiments`
Status: **locked**
Value: `false`
*Disallow Necko to do A/B testing*
### References
[https://trac.torproject.org/projects/tor/ticket/13170](https://trac.torproject.org/projects/tor/ticket/13170)
## `browser.tabs.crashReporting.sendReport`
Status: **locked**
Value: `false`
*Disable sending reports of tab crashes to Mozilla (about:tabcrashed)*
### References
[https://hg.mozilla.org/mozilla-central/file/tip/browser/app/profile/firefox.js](https://hg.mozilla.org/mozilla-central/file/tip/browser/app/profile/firefox.js)
## `browser.crashReports.unsubmittedCheck.enabled`
Status: **locked**
Value: `false`
*Don't nag user about unsent crash reports*
## `browser.crashReports.unsubmittedCheck.autoSubmit2`
Status: **locked**
Value: `false`
## `app.shield.optoutstudies.enabled`
Status: **locked**
Value: `false`
*Disable SHIELD*
### References
[https://support.mozilla.org/en-US/kb/shield](https://support.mozilla.org/en-US/kb/shield)
[https://bugzilla.mozilla.org/show_bug.cgi?id=1370801](https://bugzilla.mozilla.org/show_bug.cgi?id=1370801)
## `browser.newtabpage.activity-stream.feeds.section.topstories`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.section.highlights.includePocket`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.showSponsored`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.aboutHome.enabled`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.asrouter.messageProviders`
Status: **locked**
Value: `""`
## `browser.newtabpage.activity-stream.asrouter.devtoolsEnableds`
Status: **locked**
Value: `true`
## `browser.newtabpage.activity-stream.telemetry`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.telemetry.ping.endpoint`
Status: **locked**
Value: `""`
## `browser.newtabpage.activity-stream.feeds.telemetry`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.feeds.snippets`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.disableSnippets`
Status: **locked**
Value: `true`
## `browser.newtabpage.activity-stream.default.sites`
Status: **locked**
Value: `""`
## `browser.newtabpage.activity-stream.discoverystream.config`
Status: **locked**
Value: `""`
## `browser.newtabpage.activity-stream.discoverystream.endpoints`
Status: **locked**
Value: `""`
## `browser.newtabpage.activity-stream.feeds.asrouterfeed`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.feeds.discoverystreamfeed`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.feeds.newtabinit`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.feeds.places`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.feeds.systemtick`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar`
Status: **locked**
Value: `false`
## `browser.newtab.preload`
Status: **locked**
Value: `false`
## `browser.urlbar.suggest.searches`
Status: **locked**
Value: `false`
*Disable 'Show search suggestions in location bar results'*
## `browser.urlbar.userMadeSearchSuggestionsChoice`
Status: **locked**
Value: `true`
*Disable 'Show search suggestions in location bar results'*
## `browser.search.update`
Status: **locked**
Value: `false`
*Never check for updates to search engines*
### References
[https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_auto-update-checking](https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_auto-update-checking)
## `network.captive-portal-service.enabled`
Status: **locked**
Value: `false`
*Disable automatic captive portal detection*
### References
[https://support.mozilla.org/en-US/questions/1157121](https://support.mozilla.org/en-US/questions/1157121)
## `network.negotiate-auth.allow-insecure-ntlm-v1`
Status: **locked**
Value: `false`
*Disallow NTLMv1*
## `network.negotiate-auth.allow-insecure-ntlm-v1-https`
Status: **locked**
Value: `false`
*Disallow NTLMv1 over HTTPS too*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=828183](https://bugzilla.mozilla.org/show_bug.cgi?id=828183)
## `signon.formlessCapture.enabled`
Status: **locked**
Value: `false`
*Disable formless login capture*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=1166947](https://bugzilla.mozilla.org/show_bug.cgi?id=1166947)
## `browser.helperApps.deleteTempFileOnExit`
Status: **locked**
Value: `true`
*Delete temporary files on exit*
### References
[https://bugzilla.mozilla.org/show_bug.cgi?id=238789](https://bugzilla.mozilla.org/show_bug.cgi?id=238789)
## `browser.pagethumbnails.capturing_disabled`
Status: **locked**
Value: `true`
*Do not create screenshots of visited pages (relates to the 'new tab page' feature)*
### References
[https://support.mozilla.org/en-US/questions/973320](https://support.mozilla.org/en-US/questions/973320)
[https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/browser.pagethumbnails.capturing_disabled](https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/browser.pagethumbnails.capturing_disabled)
## `browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features`
Status: **locked**
Value: `false`
## `browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons`
Status: **locked**
Value: `false`
## `browser.messaging-system.whatsNewPanel.enabled`
Status: **locked**
Value: `false`