-Set and lock certain preferences.
-
-**Compatibility:** See below\
-**CCK2 Equivalent:** `preferences`\
-**Preferences Affected:** See below
-
-| Preference | Type | Compatibility | Default
-| --- | --- | --- | ---
-| accessibility.force_disabled | integer | Firefox 70, Firefox ESR 68.2 | 0
-| If set to 1, platform accessibility is disabled.
-| app.update.auto (Deprecated - Switch to AppAutoUpdate policy) | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, Firefox doesn't automatically install update.
-| browser.bookmarks.autoExportHTML | boolean | Firefox 70, Firefox ESR 68.2 | false
-| If true, bookmarks are exported on shutdown.
-| browser.bookmarks.file | string | Firefox 70, Firefox ESR 68.2 | N/A
-| If set, the name of the file where bookmarks are exported and imported.
-| browser.bookmarks.restore_default_bookmarks | boolean | Firefox 70, Firefox ESR 68.2 | N/A
-| If true, bookmarks are restored to their defaults.
-| browser.cache.disk.enable | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, don't store cache on the hard drive.
-| ~browser.cache.disk.parent_directory~ | string | Firefox 68, Firefox ESR 68 | Profile temporary directory
-| ~If set, changes the location of the disk cache.~ This policy doesn't work. It's being worked on.
-| browser.fixup.dns_first_for_single_words | boolean | Firefox 68, Firefox ESR 68 | false
-| If true, single words are sent to DNS, not directly to search.
-| browser.newtabpage.activity-stream.default.sites | string | Firefox 72, ESR 68.4 | Locale dependent
-| If set, a list of URLs to use as the default top sites on the new tab page.
-| browser.places.importBookmarksHTML | boolean | Firefox 70, Firefox ESR 68.2
-| If true, bookmarks are always imported on startup.
-| browser.safebrowsing.phishing.enabled | boolean | Firefox 70, Firefox ESR 68.2 | true
-| If false, phishing protection is not enabled (Not recommended)
-| browser.safebrowsing.malware.enabled | boolean | Firefox 70, Firefox ESR 68.2 | true
-| If false, malware protection is not enabled (Not recommended)
-| browser.search.update | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, updates for search engines are not checked.
-| browser.slowStartup.notificationDisabled | boolean | Firefox 70, Firefox ESR 68.2 | false
-| If true, a notification isn't shown if startup is slow.
-| browser.tabs.warnOnClose | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, there is no warning when the browser is closed.
-| browser.taskbar.previews.enable | boolean | Firefox 70, Firefox ESR 68.2 (Windows only) | false
-| If true, tab previews are shown in the Windows taskbar.
-| browser.urlbar.suggest.bookmark | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, bookmarks aren't suggested when typing in the URL bar.
-| browser.urlbar.suggest.history | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, history isn't suggested when typing in the URL bar.
-| browser.urlbar.suggest.openpage | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, open tabs aren't suggested when typing in the URL bar.
-| datareporting.policy.dataSubmissionPolicyBypassNotification | boolean | Firefox 68, Firefox ESR 68 | false
-| If true, don't show the privacy policy tab on first run.
-| dom.allow_scripts_to_close_windows | boolean | Firefox 70, Firefox ESR 68.2 | false
-| If false, web page can close windows.
-| dom.disable_window_flip | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, web pages can focus and activate windows.
-| dom.disable_window_move_resize | boolean | Firefox 68, Firefox ESR 68 | false
-| If true, web pages can't move or resize windows.
-| dom.event.contextmenu.enabled | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, web pages can't override context menus.
-| dom.keyboardevent.keypress.hack.dispatch_non_printable_keys.addl | string | Firefox 68, Firefox ESR 68 | N/A
-| See https://support.mozilla.org/en-US/kb/dom-events-changes-introduced-firefox-66
-| dom.keyboardevent.keypress.hack.use_legacy_keycode_and_charcode.addl | string | Firefox 68, Firefox ESR 68 | N/A
-| See https://support.mozilla.org/en-US/kb/dom-events-changes-introduced-firefox-66
-| dom.xmldocument.load.enabled | boolean | Firefox ESR 68.5 | true.
-| If false, XMLDocument.load is not available.
-| dom.xmldocument.async.enabled | boolean | Firefox ESR 68.5 | true
-| If false, XMLDocument.async is not available.
-| extensions.blocklist.enabled | boolean | Firefox 70, Firefox ESR 68.2 | true
-| If false, the extensions blocklist is not used (Not recommended)
-| extensions.getAddons.showPane | boolean | Firefox 68, Firefox ESR 68 | N/A
-| If false, the Recommendations tab is not displayed in the Add-ons Manager.
-| extensions.htmlaboutaddons.recommendations.enabled | boolean | Firefox 72, Firefox ESR 68.4 | true
-| If false, recommendations are not shown on the Extensions tab in the Add-ons Manager.
-| geo.enabled | boolean | Firefox 70, Firefox ESR 68.2 | true
-| If false, the geolocation API is disabled. | Language dependent
-| intl.accept_languages | string | Firefox 70, Firefox ESR 68.2
-| If set, preferred language for web pages.
-| media.eme.enabled (Deprecated - Switch to EncryptedMediaExtensions policy) | boolean | Firefox 70, Firefox ESR 68.2 | true
-| If false, Encrypted Media Extensions are not enabled.
-| media.gmp-gmpopenh264.enabled | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, the OpenH264 plugin is not downloaded.
-| media.gmp-widevinecdm.enabled | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, the Widevine plugin is not downloaded.
-| media.peerconnection.enabled | boolean | Firefox 72, Firefox ESR 68.4 | true
-| If false, WebRTC is disabled
-| media.peerconnection.ice.obfuscate_host_addresses.whitelist (Deprecated) | string | Firefox 72, Firefox ESR 68.4 | N/A
-| If set, a list of domains for which mDNS hostname obfuscation is
-disabled
-| media.peerconnection.ice.obfuscate_host_addresses.blocklist | string | Firefox 79, Firefox ESR 78.1 | N/A
-| If set, a list of domains for which mDNS hostname obfuscation is
-disabled
-| network.dns.disableIPv6 | boolean | Firefox 68, Firefox ESR 68 | false
-| If true, IPv6 DNS lokoups are disabled.
-| network.IDN_show_punycode | boolean | Firefox 68, Firefox ESR 68 | false
-| If true, display the punycode version of internationalized domain names.
-| places.history.enabled | boolean | Firefox 68, Firefox ESR 68 | true
-| If false, history is not enabled.
-| print.save_print_settings | boolean | Firefox 70, Firefox ESR 68.2 | true
-| If false, print settings are not saved between jobs.
-| security.default_personal_cert | string | Firefox 68, Firefox ESR 68 | Ask Every Time