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stable8 Apr 2026 to 16 Sep 2026

Mozilla Firefox: 7.9.1 to 8.3

18 new settings, 70 changed since 7.9.1. 7 retained releases apart.

CSVJSONBrowse its 415 settings Vendor download page

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63 settings · compared with 7.9.1
  • Bookmarks (JSON)
    Computer and user · Mozilla\Firefox\Bookmarks
    • Description … no effect on Managed Bookmarks. For detailed information on the JSON, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#bookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/bookmarks/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to configure bookmarks, including [] to clear all bookmarks. If this policy is disabled or not configured, the individual bookmark policies are used. If this policy is enabled along with individual bookmarks, those bookmarks will not be added. This policy has no effect on Managed Bookmarks. For detailed information on the JSON, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#bookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/bookmarks/.]

  • Bookmarks (JSON on one line)
    Computer and user · Mozilla\Firefox\Bookmarks
    • Description … no effect on Managed Bookmarks. For detailed information on the JSON, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#bookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/bookmarks/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to configure bookmarks, including [] to clear all bookmarks. If this policy is disabled or not configured, the individual bookmark policies are used. If this policy is enabled along with individual bookmarks, those bookmarks will not be added. This policy has no effect on Managed Bookmarks. For detailed information on the JSON, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#bookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/bookmarks/.]

  • Auto Launch Protocols From Origins
    Computer and user · Mozilla\Firefox
    • Description … the user for permission. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#autolaunchprotocolsfromorigins.][added: https://firefox-admin-docs.mozilla.org/reference/policies/autolaunchprotocolsfromorigins/.]
      Whole description, marked

      If this policy is enabled, you can define a list of external protocols that can be used from listed origins without prompting the user. If this policy is disabled or not configured, any site that invokes an external protocol will ask the user for permission. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#autolaunchprotocolsfromorigins.][added: https://firefox-admin-docs.mozilla.org/reference/policies/autolaunchprotocolsfromorigins/.]

  • Auto Launch Protocols From Origins (JSON on one line)
    Computer and user · Mozilla\Firefox
    • Description … the user for permission. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#autolaunchprotocolsfromorigins.][added: https://firefox-admin-docs.mozilla.org/reference/policies/autolaunchprotocolsfromorigins/.]
      Whole description, marked

      If this policy is enabled, you can define a list of external protocols that can be used from listed origins without prompting the user. If this policy is disabled or not configured, any site that invokes an external protocol will ask the user for permission. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#autolaunchprotocolsfromorigins.][added: https://firefox-admin-docs.mozilla.org/reference/policies/autolaunchprotocolsfromorigins/.]

  • Disable warnings based on file extension for specific file types on domains
    Computer and user · Mozilla\Firefox
    • Description … all executable file types. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#exemptdomainfiletypepairsfromfiletypedownloadwarnings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/exemptdomainfiletypepairsfromfiletypedownloadwarnings/.]
      Whole description, marked

      If this policy is enabled, you can define a list of domains and file type extensions that will be exempt from executable warnings. If this policy is disabled or not configured, warnings are shown for all executable file types. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#exemptdomainfiletypepairsfromfiletypedownloadwarnings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/exemptdomainfiletypepairsfromfiletypedownloadwarnings/.]

  • Disable warnings based on file extension for specific file types on domains (JSON on one line)
    Computer and user · Mozilla\Firefox
    • Description … all executable file types. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#exemptdomainfiletypepairsfromfiletypedownloadwarnings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/exemptdomainfiletypepairsfromfiletypedownloadwarnings/.]
      Whole description, marked

      If this policy is enabled, you can define a list of domains and file type extensions that will be exempt from executable warnings. If this policy is disabled or not configured, warnings are shown for all executable file types. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#exemptdomainfiletypepairsfromfiletypedownloadwarnings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/exemptdomainfiletypepairsfromfiletypedownloadwarnings/.]

  • Extension Management
    Computer and user · Mozilla\Firefox\Extensions
    • Description … will not be managed. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#extensionsettings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/extensionsettings/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to describe the extension management policy. If this policy is disabled or not configured, extensions will not be managed. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#extensionsettings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/extensionsettings/.]

  • Extension Management (JSON on one line)
    Computer and user · Mozilla\Firefox\Extensions
    • Description … will not be managed. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#extensionsettings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/extensionsettings/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to describe the extension management policy. If this policy is disabled or not configured, extensions will not be managed. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#extensionsettings.][added: https://firefox-admin-docs.mozilla.org/reference/policies/extensionsettings/.]

  • Handlers
    Computer and user · Mozilla\Firefox
    • Description … Firefox defaults are used. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#handlers.][added: https://firefox-admin-docs.mozilla.org/reference/policies/handlers/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to configure default application handlers. If this policy is disabled or not configured, Firefox defaults are used. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#handlers.][added: https://firefox-admin-docs.mozilla.org/reference/policies/handlers/.]

  • Handlers (JSON on one line)
    Computer and user · Mozilla\Firefox
    • Description … Firefox defaults are used. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#handlers.][added: https://firefox-admin-docs.mozilla.org/reference/policies/handlers/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to configure default application handlers. If this policy is disabled or not configured, Firefox defaults are used. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#handlers.][added: https://firefox-admin-docs.mozilla.org/reference/policies/handlers/.]

  • Managed Bookmarks
    Computer and user · Mozilla\Firefox
    • Description … bookmarks are not added. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#managedbookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/managedbookmarks/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to configure managed bookmarks. If this policy is disabled or not configured, managed bookmarks are not added. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#managedbookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/managedbookmarks/.]

  • Managed Bookmarks (JSON on one line)
    Computer and user · Mozilla\Firefox
    • Description … bookmarks are not added. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#managedbookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/managedbookmarks/.]
      Whole description, marked

      If this policy is enabled, you can use JSON to configure managed bookmarks. If this policy is disabled or not configured, managed bookmarks are not added. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#managedbookmarks.][added: https://firefox-admin-docs.mozilla.org/reference/policies/managedbookmarks/.]

  • Preferences
    Computer and user · Mozilla\Firefox
    • Description … preferences are not modified. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences.][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.]
      Whole description, marked

      Note: In order to use this policy, you must clear all settings in the old Preferences (Deprecated) section. If this policy is enabled, you can use JSON to configure preferences. If this policy is disabled or not configured, preferences are not modified. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences.][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.]

  • Preferences (JSON on one line)
    Computer and user · Mozilla\Firefox
    • Description … preferences are not modified. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences.][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.]
      Whole description, marked

      Note: In order to use this policy, you must clear all settings in the old Preferences (Deprecated) section. If this policy is enabled, you can use JSON to configure preferences. If this policy is disabled or not configured, preferences are not modified. For detailed information on creating the policy, see [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences.][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.]

  • accessibility.force_disabled
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences.][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.]
      Whole description, marked

      If this policy is enabled, the preference is locked to the value selected. If this policy is disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences.][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.]

  • browser.bookmarks.autoExportHTML
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.bookmarks.file
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to the string entered. If this policy is disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.bookmarks.restore_default_bookmarks
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.cache.disk.enable
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.cache.disk.parent_directory
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to the string entered. If this policy is disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.fixup.dns_first_for_single_words
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.newtabpage.activity-stream.default.sites
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to the string entered. If this policy is disabled, it has no effect. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.places.importBookmarksHTML
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.safebrowsing.malware.enabled
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.safebrowsing.phishing.enabled
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.search.update
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.slowStartup.notificationDisabled
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.tabs.warnOnClose
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.taskbar.previews.enable
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

  • browser.urlbar.suggest.bookmark
    Computer and user · Mozilla\Firefox\Preferences (Deprecated)
    • Description … preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]
      Whole description, marked

      If this policy is enabled, the preference is locked to true. If this policy is disabled, the preference is locked to false. For a description of the preference, see: [removed: https://github.com/mozilla/policy-templates/blob/master/README.md#preferences][added: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/]

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 20 Oct 23:56 UTC · 258 of 260 readable · 256 fully read · documentation 416/439 current

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