Microsoft Windows XP SP2 or later Firefox Permissions Authentication Bookmarks Certificates Popups Cookies Addons Extensions Flash Home page Allowed Sites Blocked Sites SPNEGO List of sites that are permitted to engage in SPNEGO authentication with the browser. Delegated List of sites for which the browser may delegate user authorization to the server. NTLM List of sites trusted to use NTLM authentification. Block About Addons Block access to the Add-ons Mananger (about:addons). Block About Config Blocks access to the about:config page. Block About Profiles Blocks access to the about:profiles page. Block About Support Blocks access to the about:support page. Disable Set Desktop Background If this policy is enabled, the user can not set an image as their desktop background. If this policy is disabled or not configured, users can set images as their desktop background. Import Enterprise Roots If this policy is enabled, Firefox will read certificates from the Windows certificate store. If this policy is disabled or not configured, Firefox will not read certificates from the Windows certificate store. Disable Master Password Creation If this policy is enabled, users cannot create a master password. If this policy is disabled or not configured, users can create a master password. Disable Update Prevent the browser from updating. Disable Builtin PDF Viewer Disables PDF.js, which displays PDFs within Firefox. Disable Developer Tools Prevents access to developer tools. Disable Feedback Commands Prevents ability to send feedback from the help menu ("Submit Feedback" and "Report Deceptive Site"). Disable Firefox Accounts Disables Firefox Account based services, including Sync. Disable Firefox Screenshots Prevents usage of the Firefox Screenshots feature. Disable Firefox Studies Prevents Firefox from running studies. Disable Forget Button If this policy is enabled, the "Forget" button is not available. If this policy is disabled or not configured, the "Forget" button is available. Disable Form History Don't remember search and form history. Disable Pocket Prevents ability to save webpages to Pocket. Disable Private Browsing Disables private browsing. Disable Profile Refresh If this policy is enabled, the "Refresh Firefox" button is not available on the about:support page or on support.mozilla.org. If this policy is disabled or not configured, the "Refresh Firefox" button is available. Disable Safe Mode Prevents ability to restart in safe mode. Prevent overriding certificate errors If this policy is enabled, the "Add Exception" button is not available when a certificate is invalid. This prevents the user from overriding the certificate error. If this policy is disabled or not configured, certificate errors can be overridden. Prevent overriding safe browsing errors If this policy is enabled, a user can not bypass the warning and visit a harmful site. If this policy is disabled or not configured, a user can choose to visit a harmful site. Disable System Addon Updates If this policy is enabled, new system add-ons will not be installed and existing system add-ons will not be updated. If this policy is disabled or not configured, system add-ons are installed and updated. Disable Telemetry If this policy is enabled, telemetry is not uploaded. If this policy is disabled or not configured, telemetry is collected and uploaded. Mozilla strongly recommends that you do NOT disable telemetry if you do not have a business need to do so. Display Bookmarks Toolbar Causes the bookmarks toolbar to be displayed by default. Display Menu Bar Causes the menu bar to be displayed by default. Don't Check Default Browser Don't check for the default browser on startup. Install If this policy is enabled, you can specify a list of extension URLs or paths that will be installed when Firefox is started. Anytime this list is changed, the extensions will be reinstalled. If this policy is disabled or not configured, no extensions are installed. Uninstall If this policy is enabled, you can specify a list of extension IDs that will be uninstalled. Anytime this list is changed, the extensions will be uninstalled. If this policy is disabled or not configured, no extensions are uninstalled. Locked If this policy is enabled, you can specify a list of extension IDs that the user will be unable to uninstall or disable. If this policy is disabled or not configured, no extensions are locked. Remember Passwords Enforces the setting to allow Firefox to remember saved logins and passwords. Both true and false values are accepted. If this policy is enabled, pop-up windows are always allowed for the URLS indicated. If a top level domain is specified (http://example.org), pop-up windows are allowed for all subdomains as well. If this policy is disabled or not configured, the default pop-up policy is followed. Allow pop-ups from websites If this policy is disabled, pop-up windows are allowed from websites by default. If this policy is not configured or enabled, popups are not allowed from websites. Do not allow preferences to be changed If this policy is enabled pop-up preferences cannot be changed by the user. If this policy is disabled or not configured, the user can change their pop-up preferences. If this policy is enabled, add-ons are always allowed for the URLS indicated unless add-on install is disabled. If a top level domain is specified (http://example.org), add-ons are allowed for all subdomains as well. If this policy is disabled or not configured, the default add-on policy is followed. Allow add-on installs from websites If this policy is disabled, add-ons cannot be installed. If this policy is not configured or enabled, add-ons can be installed. If this policy is enabled, cookies are always allowed for the URLS indicated. If a top level domain is specified (http://example.org), cookies are allowed for all subdomains as well. If this policy is disabled or not configured, the default cookie policy is followed. If this policy is enabled, cookies are blocked for the URLS indicated. If a top level domain is specified (http://example.org), cookies are blocked from all subdomains as well. If this policy is disabled or not configured, cookies are not blocked by default. Accept cookies from websites If this policy is disabled, cookies are not accepted from websites by default. If this policy is not configured or enabled, cookies are accepted from websites. Accept third-party cookies If this policy is enabled and cookies are allowed, you can set when to accept third-party cookies. This setting is ignored if this policy is disabled or not configured or if cookies are not allowed. Always Never From visited Keep cookies until Firefox is closed If this policy is enabled and cookies are allowed, they will expire when Firefox is closed. This setting is ignored if this policy is disabled or not configured or if cookies are not allowed. Do not allow preferences to be changed If this policy is enabled cookie preferences cannot be changed by the user. If this policy is disabled or not configured, the user can change their cookie preferences. If this policy is enabled, Flash is activated by default for the URLS indicated unless Flash is completely disabled. If a top level domain is specified (http://example.org), Flash is allowed for all subdomains as well. If this policy is disabled or not configured, the default Flash policy is followed. If this policy is enabled, Flash is blocked for the URLS indicated. If a top level domain is specified (http://example.org), Flas is blocked from all subdomains as well. If this policy is disabled or not configured, the default Flash policy is followed. Activate Flash on websites If this policy is enabled, Flash is always activates on websites. If this policy is disabled, Flash is never activated on websites, even if they are in the specified in the Allow list. If this policy is not configured Flash, Flash is click to play. Do not allow preferences to be changed If this policy is enabled Flash preferences cannot be changed by the user. If this policy is disabled or not configured, the user can change their Flash preferences. Override the first run page If this policy is enabled, you can specify a URL to be used as the first run page. If you leave the URL blank, no first run page will be shown. If this policy is disabled or not configured the first run page is displayed. Override the upgrade page If this policy is enabled, you can specify a URL to be displayed after Firefox is updated. If you leave the URL blank, no upgrade page will be shown. If this policy is disabled or not configured the upgrade is displayed. Clear all data when browser is closed If this policy is enabled, all data is cleared when Firefox is closed. This includes Browsing & Download History, Cookies, Active Logins, Cache, Form & Search History, Site Preferences and Offline Website Data. If this policy is disabled or not configured, data is not cleared when the browser is closed. Bookmark 1 Bookmark 2 Bookmark 3 Bookmark 4 Bookmark 5 Bookmark Explanation Toolbar Menu No Default Bookmarks Don't create the default bookmarks or the Smart Bookmarks (Most Visited, Recent Tags). Note: this policy is only effective if used before the first run of the profile. URL for Home page Homepage Settings Additional Homepages If you want to have more than one homepage Proxy Settings If this policy is enabled, you should select the connection type and then fill in the appropriate sections. Due to a bug, you must select a value for the SOCKS proxy version. SOCKS v4 SOCKS v5 Automatic proxy configuration URL These should only be set if you selected autoConfig Proxy bypass URLs These should only be set if you selected manual proxy Connection Type No Proxy Use system proxy settings Manual proxy configuration Auto-detect proxy settings Automatic proxy configuration Tracking Protection If this policy is not configured, tracking protection is not enabled by default in the browser but it is enabled by default in private browsing and the user can change it. If this policy is disabled, tracking protection is disabled and locked in both the browser and private browsing. If this policy is enabled, private browsing is enabled by default in both the browser and private browsing and you can choose whether or not to prevent the user from changing it. Search bar location If this policy is enabled, you can set whether the search bar is separate from the URL bar. If this policy is not configured or disabled, new users get a unified search bar, users upgrading from Firefox 56 and below get a separate search bar. Unified Separate Allow popups for websites Don't allow tracking protection preferences to be changed. URL: URL: Don't allow the homepage to be changed. Additional homepages Title: URL: Favicon URL: Placement: Folder name: Don't allow proxy settings to be changed. Connection Type: HTTP Proxy: Use this proxy server for all protocols. SSL Proxy: FTP Proxy: SOCKS Host: SOCKS Version: No proxy for Example: .mozilla.org, .net.nz, 192.168.1.0/24 Automatic proxy configuration URL: Do not prompt for authentication if password is saved. Proxy DNS when using SOCKS v5.