| 3rdparty | obj | Security | 1 sub-fields |
| AccessConnector | obj | Network | 4 sub-fields |
| AIChatbot | obj | Content settings | 2 sub-fields |
| AIControls | obj | Content settings | 7 sub-fields |
| AllowedDomainsForApps | str | Network security | Define domains allowed to access Google Workspace. |
| AllowFileSelectionDialogs | bool | Browser UI | Enable or disable file selection dialogs. |
| AppAutoUpdate | bool | Device update settings | Enable or disable **automatic** application update. |
| AppUpdatePin | str | Device update settings | Prevent Firefox from being updated beyond the specified version. |
| AppUpdateURL | url | Device update settings | Change the URL for application update if you are providing Firefox updates from a custom update server. |
| Authentication | obj | Authentication | 7 sub-fields |
| AutofillAddressEnabled | bool | Password manager | Enables or disables autofill for addresses. |
| AutofillCreditCardEnabled | bool | Password manager | Enables or disables autofill for payment methods. |
| AutoLaunchProtocolsFromOrigins | arr | Network security | items: 2 fields |
| BackgroundAppUpdate | bool | Device update settings | Enable or disable automatic application update in the background, when the application is not running. |
| BlockAboutAddons | bool | Extensions | Block access to the Add-ons Manager ('about:addons'). |
| BlockAboutConfig | bool | Security | Block access to 'about:config'. |
| BlockAboutProfiles | bool | Security | Block access to About Profiles ('about:profiles'). |
| BlockAboutSupport | bool | Security | Block access to Troubleshooting Information ('about:support'). |
| BlocklistDomainBrowsedTelemetry | obj | Cloud reporting | 2 sub-fields |
| Bookmarks | arr | Bookmarks | items: 5 fields |
| BrowserDataBackup | obj | Security | 2 sub-fields |
| CaptivePortal | bool | Network security | Enable or disable the detection of captive portals. |
| Certificates | obj | Certificate management | 2 sub-fields |
| Containers | obj | Extensions | 1 sub-fields |
| ContentAnalysis | obj | Cloud reporting | 14 sub-fields |
| Cookies | obj | Network security | 10 sub-fields |
| CrashReportsSubmit | obj | Cloud reporting | 1 sub-fields |
| DefaultDownloadDirectory | str | Downloads | Set the default download directory. |
| DefaultSerialGuardSetting | enum | Uncategorized | 2, 3 |
| DisableAccounts | bool | Miscellaneous | Disable account-based services, including sync. |
| DisableAppUpdate | bool | Device update settings | Turn off application updates within Firefox. |
| DisableBuiltinPDFViewer | bool | Printing | Disable the built in PDF viewer. |
| DisabledCiphers | obj | Network security | 20 sub-fields |
| DisableDefaultBrowserAgent | bool | Miscellaneous | Prevent the default browser agent from taking any actions. |
| DisableDeveloperTools | bool | Security | Remove access to all developer tools. |
| DisableEncryptedClientHello | bool | Network security | Disable the TLS Feature for Encrypted Client Hello. |
| DisableFeedbackCommands | bool | Browser UI | Disable the menus for reporting sites (Submit Feedback, Report Deceptive Site). |
| DisableFirefoxAccounts | bool | Miscellaneous | Disable Firefox Accounts integration (Sync). |
| DisableFirefoxScreenshots | bool | Miscellaneous | Remove access to Firefox Screenshots. |
| DisableFirefoxStudies | bool | Miscellaneous | Disable Firefox studies (Shield). |
| DisableForgetButton | bool | Miscellaneous | 'Disable the "Forget" button.' |
| DisableFormHistory | bool | Local data storage | Turn off saving information on web forms and the search bar. |
| DisableMasterPasswordCreation | bool | Password manager | Remove the master password functionality. |
| DisablePasswordReveal | bool | Password manager | Do not allow passwords to be shown in saved logins |
| DisablePocket | bool | Miscellaneous | Remove Pocket in the Firefox UI. |
| DisablePrivateBrowsing | bool | Browsing restrictions | Remove access to private browsing. |
| DisableProfileImport | bool | Bookmarks | Remove the ability to import data from other browsers. |
| DisableProfileRefresh | bool | Miscellaneous | Disable the Refresh Firefox button on 'about:support' and 'support.mozilla.org', as well as the prompt that displays offering to refresh Firefox when you haven't used it in a while. |
| DisableRemoteImprovements | bool | Miscellaneous | Prevent Firefox from applying performance, stability, and feature changes between updates. |
| DisableSafeMode | bool | Security | Disable safe mode (Troubleshoot Mode) within the browser. |
| DisableSecurityBypass | obj | Certificate management | 2 sub-fields |
| DisableSetDesktopBackground | bool | Browser UI | 'Remove the "Set As Desktop Background..." menuitem when right clicking on an image.' |
| DisableSystemAddonUpdate | bool | Device update settings | Prevent system add-ons from being installed or updated. |
| DisableTelemetry | bool | Miscellaneous | Prevent the upload of telemetry data. |
| DisableThirdPartyModuleBlocking | bool | Security | Do not allow blocking third-party modules from the 'about:third-party' page. |
| DisplayBookmarksToolbar | bool | Bookmarks | always, never, newtab |
| DisplayMenuBar | bool | Browser UI | always, never, default-on, default-off |
| DNSOverHTTPS | obj | Network security | 5 sub-fields |
| DontCheckDefaultBrowser | bool | Startup | Don't check if Firefox is the default browser at startup. |
| DownloadDirectory | str | Downloads | Set and lock the download directory. |
| DownloadTelemetry | obj | Cloud reporting | 3 sub-fields |
| EnableTrackingProtection | obj | Network security | 10 sub-fields |
| EncryptedMediaExtensions | obj | Content settings | 2 sub-fields |
| EnterpriseStorageEncryption | bool | Miscellaneous | EnterpriseStorageEncryption |
| ExemptDomainFileTypePairsFromFileTypeDownloadWarnings | arr | Network security | items: 2 fields |
| Extensions | obj | Extensions | 3 sub-fields |
| ExtensionSettings | obj | Extensions | 1 sub-fields |
| ExtensionUpdate | bool | Extensions | Control extension updates. |
| FirefoxHome | obj | Startup | 11 sub-fields |
| FirefoxSuggest | obj | Search | 5 sub-fields |
| GenerativeAI | obj | Miscellaneous | 6 sub-fields |
| GoToIntranetSiteForSingleWordEntryInAddressBar | bool | Network security | Whether to always go through the DNS server before sending a single word search string to a search engine. |
| Handlers | json | Security | Configure default application handlers. |
| HardwareAcceleration | bool | Miscellaneous | Control hardware acceleration. |
| Homepage | obj | Startup | 4 sub-fields |
| HttpAllowlist | arr | Network security | Configure sites that will not be upgraded to HTTPS. |
| HttpsOnlyMode | enum | Network security | allowed, disallowed, enabled, force_enabled |
| InstallAddonsPermission | obj | Extensions | 2 sub-fields |
| IPProtectionAvailable | bool | Network security | |
| LegacyProfiles | bool | Miscellaneous | Disable the feature enforcing a separate profile for each installation. |
| LegacySameSiteCookieBehaviorEnabled | bool | Network security | Enable default legacy SameSite cookie behavior setting. |
| LegacySameSiteCookieBehaviorEnabledForDomainList | arr | Network security | Revert to legacy SameSite behavior for cookies on specified sites. |
| LocalFileLinks | arr | Network security | Enable linking to local files by origin. |
| LocalNetworkAccess | obj | Network security | 5 sub-fields |
| ManagedBookmarks | arr | Bookmarks | items: 4 fields |
| ManualAppUpdateOnly | bool | Device update settings | Switch to manual updates only. |
| MicrosoftEntraSSO | bool | Authentication | Allow single sign-on for Microsoft Entra accounts on macOS. |
| NetworkPrediction | bool | Network security | Enable or disable network prediction (DNS prefetching). |
| NewTabPage | bool | Startup | Enable or disable the New Tab page. |
| NoDefaultBookmarks | bool | Bookmarks | Disable the creation of default bookmarks. |
| OfferToSaveLogins | bool | Password manager | Control whether or not Firefox offers to save passwords. |
| OfferToSaveLoginsDefault | bool | Password manager | Sets the default value of 'signon.rememberSignons' without locking it. |
| OverrideFirstRunPage | str | Startup | Override the first run page. |
| OverridePostUpdatePage | url | Startup | Override the upgrade page. |
| PasswordManagerEnabled | bool | Password manager | Remove access to the password manager via preferences and blocks about:logins on Firefox 70. |
| PasswordManagerExceptions | arr | Password manager | Prevent Firefox from saving passwords for specific sites. |
| PDFjs | obj | Printing | 2 sub-fields |
| Permissions | obj | Content settings | 7 sub-fields |
| PictureInPicture | obj | Content settings | 2 sub-fields |
| PopupBlocking | obj | Content settings | 3 sub-fields |
| PostQuantumKeyAgreementEnabled | bool | Network security | Enable post-quantum key agreement for TLS. |
| Preferences | json | Security | Set and lock preferences. |
| PrimaryPassword | bool | Password manager | Require or prevent using a primary (formerly master) password. |
| PrintingEnabled | bool | Printing | Enable or disable printing. |
| PrintPageTelemetry | obj | Cloud reporting | 2 sub-fields |
| PrivateBrowsingModeAvailability | enum | Browsing restrictions | 0, 1, 2 |
| PromptForDownloadLocation | bool | Downloads | Ask where to save each file before downloading. |
| Proxy | obj | Network security | 12 sub-fields |
| RelaunchRequired | obj | Miscellaneous | 2 sub-fields |
| RequestedLocales | arr | Miscellaneous | Set the the list of requested locales for the application in order of preference. |
| SanitizeOnShutdown | obj | Local data storage | 9 sub-fields |
| SearchBar | enum | Search | unified, separate |
| SearchEngines | obj | Search | 5 sub-fields |
| SearchSuggestEnabled | bool | Search | Enable search suggestions. |
| SecurityDevices | obj | Certificate management | 2 sub-fields |
| ShowHomeButton | bool | Startup | Show the home button on the toolbar. |
| SitePolicies | arr | Browsing restrictions | items: 3 fields |
| SkipTermsOfUse | bool | Startup | Configure display settings for the Firefox Terms of Use and Privacy Notice on startup. |
| SSLVersionMax | enum | Network security | tls1, tls1.1, tls1.2, tls1.3 |
| SSLVersionMin | enum | Network security | tls1, tls1.1, tls1.2, tls1.3 |
| StartDownloadsInTempDirectory | bool | Downloads | Force downloads to start off in a local, temporary location rather than the default download directory. |
| SupportMenu | obj | Browser UI | 3 sub-fields |
| Sync | obj | Local data storage | 10 sub-fields |
| TranslateEnabled | bool | Content settings | Enable or disable webpage translation. |
| UserMessaging | obj | Miscellaneous | 8 sub-fields |
| UseSystemPrintDialog | bool | Printing | Use the system print dialog instead of the print preview window. |
| VisualSearchEnabled | bool | Search | Enable or disable visual search. |
| WebsiteFilter | obj | Browsing restrictions | 2 sub-fields |
| WindowsSSO | bool | Authentication | Allow Windows single sign-on for Microsoft, work, and school accounts. |
| XSLTEnabled | bool | Content settings | Enable or disable support for the XSLTProcessor JavaScript API and the XSLT processing instruction. |