There is absolutely nothing wrong with using Firefox 3. Nothing. I use that more than firefox 2 and i have had about 1/2 of hte crashes of Firefox 2 with Firefox 3. I already showed you and said in the other thread on how ot get Firefox Extensions working in Firefox 3 cause you are wrong with that. I think you are wrong here as well. There is absolutely nothing wrong with using Firefox 3.
The Beta tag doesnt mean anything. Firefox 3 is jsut as stable if not more stable than some Final releases of Firefox 2.