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URL n Extension Block(UnE Block) 126.96.36.199-signed.1-signed Requires Restart
Blocks URLs , Stop Downloads Bad Extensions and locks down Firefox Settings....
Lock down bookmarks/addons/downloads with a password.............Any Many More...
About this Add-on
Prevent browser changes.
Locks down Add-ons, Preferences, 'about:config', Bookmarks.
Blocks unwanted Web Sites with some specific Extensions.
All with a Master Password.