Startup.homepage override url

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When a user starts up their browser after upgrading (i.e., if browser.startup.homepage_override.mstone is different than the last time the browser started), the URL specified in this preference is loaded instead of their homepage.

Possible values and their effects

The URL to use as a homepage when the browser starts after an upgrade. In Firefox, the default value is, where %LOCALE%, %APP%, and %VERSION% are replaced with the value of general.useragent.locale, “firefox”, and the current browser version, respectively.


First checked in

2000-02-16 by Seth Spitzer

Has an effect in

  • Mozilla Suite (all versions since M14)
  • Mozilla Firefox (all versions)
  • SeaMonkey (all versions)

Related bugs

Related preferences