-| Preference | Type | Compatibility
-| --- | --- | ---
-| app.update.auto | boolean | Firefox 68, Firefox 68 ESR
-| browser.cache.disk.enable | boolean | Firefox 68, Firefox 68 ESR
-| browser.cache.disk.parent_directory | string | Firefox 68, Firefox 68 ESR
-| browser.fixup.dns_first_for_single_words | boolean | Firefox 68, Firefox 68 ESR
-| browser.search.update | boolean | Firefox 68, Firefox 68 ESR
-| browser.tabs.warnOnClose | boolean | Firefox 68, Firefox 68 ESR
-| browser.urlbar.suggest.bookmark | boolean | Firefox 68, Firefox 68 ESR
-| browser.urlbar.suggest.history | boolean | Firefox 68, Firefox 68 ESR
-| browser.urlbar.suggest.openpage | boolean | Firefox 68, Firefox 68 ESR
-| datareporting.policy.dataSubmissionPolicyBypassNotification | boolean | Firefox 68, Firefox 68 ESR
-| dom.disable_window_flip | boolean | Firefox 68, Firefox 68 ESR
-| dom.disable_window_move_resize | boolean | Firefox 68, Firefox 68 ESR
-| dom.event.contextmenu.enabled | boolean | Firefox 68, Firefox 68 ESR
-| dom.keyboardevent.keypress.hack.dispatch_non_printable_keys.addl | string | Firefox 68, Firefox 68 ESR
-| dom.keyboardevent.keypress.hack.use_legacy_keycode_and_charcode.addl | string | Firefox 68, Firefox 68 ESR
-| extensions.getAddons.showPane | boolean | Firefox 68, Firefox 68 ESR
-| media.gmp-gmpopenh264.enabled | boolean | Firefox 68, Firefox 68 ESR
-| media.gmp-widevinecdm.enabled | boolean | Firefox 68, Firefox 68 ESR
-| network.dns.disableIPv6 | boolean | Firefox 68, Firefox 68 ESR
-| network.IDN_show_punycode | boolean | Firefox 68, Firefox 68 ESR
-| places.history.enabled | boolean | Firefox 68, Firefox 68 ESR
-| security.default_personal_cert | string | Firefox 68, Firefox 68 ESR
-| security.ssl.errorReporting.enabled | boolean | Firefox 68, Firefox 68 ESR
-| ui.key.menuAccessKeyFocuses | boolean | Firefox 68, Firefox 68 ESR
+| Preference | Type | Compatibility | Default
+| --- | --- | --- | ---
+| app.update.auto | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, Firefox doesn't automatically install update.
+| browser.cache.disk.enable | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, don't store cache on the hard drive.
+| browser.cache.disk.parent_directory | string | Firefox 68, Firefox 68 ESR | Profile temporary directory
+| If set, changes the location of the disk cache.
+| browser.fixup.dns_first_for_single_words | boolean | Firefox 68, Firefox 68 ESR | false
+| If true, single words are sent to DNS, not directly to search.
+| browser.search.update | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, updates for search engines are not checked.
+| browser.tabs.warnOnClose | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, there is no warning when the browser is closed.
+| browser.urlbar.suggest.bookmark | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, bookmarks aren't suggested when typing in the URL bar.
+| browser.urlbar.suggest.history | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, history isn't suggested when typing in the URL bar.
+| browser.urlbar.suggest.openpage | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, open tabs aren't suggested when typing in the URL bar.
+| datareporting.policy.dataSubmissionPolicyBypassNotification | boolean | Firefox 68, Firefox 68 ESR | false
+| If true, don't show the privacy policy tab on first run.
+| dom.disable_window_flip | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, web pages can focus and activate windows.
+| dom.disable_window_move_resize | boolean | Firefox 68, Firefox 68 ESR | false
+| If true, web pages can't move or resize windows.
+| dom.event.contextmenu.enabled | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, web pages can't override context menus.
+| dom.keyboardevent.keypress.hack.dispatch_non_printable_keys.addl | string | Firefox 68, Firefox 68 ESR | 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 68 ESR | N/A
+| See https://support.mozilla.org/en-US/kb/dom-events-changes-introduced-firefox-66
+| extensions.getAddons.showPane | boolean | Firefox 68, Firefox 68 ESR | N/A
+| If false, the Recommendations tab is not displayed in the Add-ons Manager.
+| media.gmp-gmpopenh264.enabled | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, the OpenH264 plugin is not downloaded.
+| media.gmp-widevinecdm.enabled | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, the Widevine plugin is not downloaded.
+| network.dns.disableIPv6 | boolean | Firefox 68, Firefox 68 ESR | false
+| If true, IPv6 DNS lokoups are disabled.
+| network.IDN_show_punycode | boolean | Firefox 68, Firefox 68 ESR | false
+| If true, display the punycode version of internationalized domain names.
+| places.history.enabled | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, history is not enabled.
+| security.default_personal_cert | string | Firefox 68, Firefox 68 ESR | Ask Every Time
+| If set to Select Automatically, Firefox automatically chooses the default personal certificate.
+| security.ssl.errorReporting.enabled | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, SSL errors cannot be sent to Mozilla.
+| ui.key.menuAccessKeyFocuses | boolean | Firefox 68, Firefox 68 ESR | true
+| If false, the Alt key doesn't show the menubar on Windows.