recently i wanted to increase flash performance by installing the flash aid extension for firefox. this step has broken my flash, and now i can't watch youtube videos in full screen. i get a black screen after it was fine before.

I did remove the FF extension and I did try to completely remove the ubuntu restricted extras, but it won't let me do so, How do i restore the flash settings and completely remove the settings so i can get back to the original settings?

note that if i try to remove ubuntu restricted extras, it does try to install kubuntu restricted extras, at the same step.

thanks