This is an IMPROVEMENT to the terrible disruptive change to the Firefox look when "upgraded" recently. I believe an emulation theme should be a requirement of all future release of Firefox. This is more than a common courtesy, its a serious aspect of FUNCTION when it impacts the GUI in any significant way. It doesn't matter if this is a volunteer effort, its just the correct way to develop something that impacts so many users. Autocracy fails to be an acceptable attitude to change.