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Firefox is able to change the desktop background, despite that feature being blocked by my admin. How do they do it?

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closed as not a real question by Dave, Sathya Jan 23 '13 at 17:16

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

The more relevant question is how your admin did it. Just blocking the default UI method obviously is not sufficient. – MSalters Jan 23 '13 at 15:49
up vote 3 down vote accepted

The Group Policy setting locks the user interface so you cannot change the wallpaper via the normal route, but does not prevent a registry key modification via other means (such as Firefox or Paint).

HKEY_CURRENT_USER\Control Panel\Desktop\Wallpaper is set to %AppData%\Mozilla\Firefox\Desktop Background.bmp directly by Firefox.

I guess users can be denied write permission to the registry entry, but I wouldn't really recommend it.

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