But from my experience trying out other extensions doing the same doesn't break anything. I think they all just go off on the tabs FF has open and do their own thing with it, IME you can install several and switch between them no problem (by switching what sidebar is shown).
But from my experience trying out other extensions doing the same doesn't break anything. I think they all just go off on the tabs FF has open and do their own thing with it, IME you can install several and switch between them no problem (by switching what sidebar is shown).