How do you remove everything from what firefox left behind??
I mean everything…
Greetings!
Maybe this will help you.
Lol, notice how easy it is to delete on Mac OS X 
Also, here’s the registry keys:
HKEY_CLASSES_ROOT\FirefoxHTML
HKEY_CURRENT_USER\Software\Mozilla
HKEY_CURRENT_USER\Software\MozillaPlugins
HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla
HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins
Else put this in a notepad documents and save as [anything].bat, then run it to get rid of the registry entries.
REG DELETE HKEY_CLASSES_ROOT\FirefoxHTML /F
REG DELETE HKEY_CURRENT_USER\Software\Mozilla /F
REG DELETE HKEY_CURRENT_USER\Software\MozillaPlugins /F
REG DELETE HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla /F
REG DELETE HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins /F
Cheers,
Ragwing