Has anybody upgraded to Firefox 4 (for Mac)? In general, do you think it's a good time to upgrade? I currently run these addons: AdBlock Plus 1.3.3 LinkVisitor 3.3 NoScript 188.8.131.52 Scrapbook 1.4.3 SearchPreview 5.0.1 Session Manager 0.7.5 Tab Mix Plus 0.3.8.5 Are they all compatible? Checking the addons page I see some are compatible like this: up to 4.0.* and others 4.2a1pre, what's the difference? Is everything working properly and the same between OS X and Windows? Would you update right now, or wait a bit (how much?) Any possibility of glitches too? thanks very much!