Originally Posted by Astrotoy7
I like FF3 but FF2 has an extension I *really use alot* which seems will never get updated for FF3...
Hence, with a tiny bit of fiddling, you can use FF3 and FF2 concurrently.
I use FF3 for most stuff, and then just jump into FF2 for when I need to use said extension
with a lot of extensions you can open the extension's xpi file in in winrar or whatever then edit the install.rdf file to let it install on 3.x