DontCheckDefaultBrowser

Don't check if Firefox is the default browser at startup.

When set to true, the startup check is skipped, but users can still set Firefox as the default in the preferences. The preference is locked in both cases, so users cannot change whether the check runs.

To remove the controls to set Firefox as the default browser, see the DefaultBrowserSettingEnabled policy instead.

Compatibility

Firefox	Firefox ESR	Firefox Enterprise
Available since 60	Available since 60	Available since 149

CCK2 Equivalent: dontCheckDefaultBrowser
OMA-URI: DontCheckDefaultBrowser
Preferences Affected: browser.shell.checkDefaultBrowser

Examples

policies.json

{
  "policies": {
    "DontCheckDefaultBrowser": true
  }
}

JSON schema

DontCheckDefaultBrowser JSON schema

{
  "type": "boolean"
}

Windows (GPO)

Software\Policies\Mozilla\Firefox\DontCheckDefaultBrowser = 0x1 | 0x0

macOS

<dict>
  <key>DontCheckDefaultBrowser</key>
  <true/> | <false/>
</dict>

See also

• DefaultBrowserSettingEnabled policy
• DisableDefaultBrowserAgent policy