| **[`DisablePrivateBrowsing`](#disableprivatebrowsing)** | Remove access to private browsing.
| **[`DisableProfileImport`](#disableprofileimport)** | Disables the "Import data from another browser" option in the bookmarks window.
| **[`DisableProfileRefresh`](#disableprofilerefresh)** | Disable the Refresh Firefox button on about:support and support.mozilla.org
-| **[`DisableSafeMode`](#disablesafemode)** | Disable safe mode.
+| **[`DisableSafeMode`](#disablesafemode)** | Disable safe mode within the browser.
| **[`DisableSecurityBypass`](#disablesecuritybypass)** | Prevent the user from bypassing security in certain cases.
| **[`DisableSystemAddonUpdate`](#disablesystemaddonupdate)** | Prevent system add-ons from being installed or update.
| **[`DisableTelemetry`](#disabletelemetry)** | DisableTelemetry
| **[`Homepage`](#homepage)** | Configure the default homepage and how Firefox starts.
| **[`InstallAddonsPermission`](#installaddonspermission)** | Configure the default extension install policy as well as origins for extension installs are allowed.
| **[`NetworkPrediction`](#networkprediction)** | Enable or disable network prediction (DNS prefetching).
+| **[`NewTabPage`](#newtabpage)** | Enable or disable the New Tab page.
| **[`NoDefaultBookmarks`](#nodefaultbookmarks)** | Disable the creation of default bookmarks.
| **[`OfferToSaveLogins`](#offertosavelogins)** | Control whether or not Firefox offers to save passwords.
| **[`OverrideFirstRunPage`](#overridefirstrunpage)** | Override the first run page.
| **[`OverridePostUpdatePage`](#overridepostupdatepage)** | Override the upgrade page.
-| **[`PopupBlocking`](#popupblocking)** | Configure the default pop-up window policy as well as origins for which pop-up windows are allowed.
| **[`Permissions`](#permissions)** | Set permissions associated with camera, microphone, location, and notifications.
+| **[`PopupBlocking`](#popupblocking)** | Configure the default pop-up window policy as well as origins for which pop-up windows are allowed.
+| **[`Preferences`](#preferences)** | Set and lock some preferences.
| **[`Proxy`](#proxy)** | Configure proxy settings.
| **[`RequestedLocales`](#requestedlocales)** | Set the the list of requested locales for the application in order of preference.
| **[`SanitizeOnShutdown`](#sanitizeonshutdown)** | Clear all data on shutdown.
}
```
### DisableSafeMode
-Disable safe mode.
+Disable safe mode within the browser.
+
+On Windows, this disables safe mode via the command line as well.
**Compatibility:** Firefox 60, Firefox ESR 60 (Windows, macOS)\
**CCK2 Equivalent:** `disableSafeMode`\
}
```
### NetworkPrediction
-Enable or disable network prediction (DNS prefetching).
+Enable or disable network prediction (DNS prefetching).
**Compatibility:** Firefox 67, Firefox ESR 60.7\
**CCK2 Equivalent:** N/A\
"NetworkPrediction": true | false
}
```
+### NewTabPage
+Enable or disable the New Tab page.
+
+**Compatibility:** Firefox 68, Firefox ESR 68\
+**CCK2 Equivalent:** N/A\
+**Preferences Affected:** N/A
+
+#### Windows
+```
+Software\Policies\Mozilla\Firefox\NewTabPage = 0x1 | 0x0
+```
+#### macOS
+```
+<dict>
+ <key>NewTabPage</key>
+ <true/> | <false/>
+</dict>
+```
+#### JSON
+```
+{
+ "policies": {
+ "NewTabPage": true | false
+}
+```
### OfferToSaveLogins
Control whether or not Firefox offers to save passwords.
}
}
```
+### Preferences
+Set and lock certain preferences.
+
+**Compatibility:** See below\
+**CCK2 Equivalent:** `preferences`\
+**Preferences Affected:** See below
+
+| 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
+#### Windows
+```
+Software\Policies\Mozilla\Firefox\Preferences\boolean_preference_name = 0x1 | 0x0
+Software\Policies\Mozilla\Firefox\Preferences\string_preference_name = "string_value"
+```
+#### macOS
+```
+<dict>
+ <key>Preference</key>
+ <dict>
+ <key>boolean_preference_name</key>
+ <true/> | <false/>
+ <key>string_preference_name</key>
+ <string>string_value</string>
+ </dict>
+</dict>
+```
+#### JSON
+```
+{
+ "policies": {
+ "Preference": {
+ "boolean_preference_name": true | false,
+ "string_preference_name": "string_value"
+ }
+ }
+}
+```
### Proxy
-Configugre proxy settings. These settings correspond to the connection settings in Firefox preferences.
+Configure proxy settings. These settings correspond to the connection settings in Firefox preferences.
To specify ports, append them to the hostnames with a colon (:).
`Mode` is the proxy method being used.