I have recently built a template for a website that I see looks slightly different in different versions of FireFox. I was wondering, as a rule of thumb, which versions of FireFox are worth supporting? FF2 and up? FF3 and up?
Thanks for your help,
spryno724
Depends on your audience, really. Have you looked at your logs/analytics data to see what the majority of users are hitting your pages with? You will need that piece of data to answer your own question well.
Having said that: with FF4 out now, I think it is safe to support 3.6 and above only.
The Mozilla community tends to take the upgrade path quicker than most.