Firefox Issues making me MAD

I’m not sure if this is the correct forum for this.

I’ve been having BIG problems with Firefox. When I view flash sites, it bogs like crazy and doesn’t respond, that is until I hold down my mouse button. It runs fine and REAL smooth when I hold down the mouse button, but when I release it, it bogs some more.

WHAT IS THE DEAL?!?!?!

I thought Firefox was suppose to be so great. The only reason I am still using it is for the fact that it will clear the cache when you hit the reload button (the others you have to manually clear your cache in the preferences).