Firefox3b2
To test my new homepage, I finally downloaded the newest version of Firefox and manually made every extension workable in Firefox3b2.
I extracted xpi file (actually its a zip file) and change the maxversion inside the rdf file to “3.*”. Then archive the file again. Currently, I am using firebug, web developer and hit-a-hint extensions. They work well with FF3 till now.
Reference:
http://fireclipse.xucia.com/#Downloads