Firefox 4 is coming! And it will look like Chrome…
Site speed is king… is your site optimized for speed?! Or is it on a slow dog of an overloaded server? Hopefully this will force slow sites to the bottom of the heap for search… I recommend using the YSlow tool in Firefox to diagnose these issues… lots of these are coding issues… but sometimes an optimized database can cause delays… anyways… pay attention this is a good vid from Google
Official Google Webmaster Central Blog: You and site performance, sitting in a tree….
I am glad to be a part of the record breaking event. Firefox 3 officially downloaded 8,002,530 in a 24 hour period according to the BBC. Here is my badge indicating I was officially a part of the event. Did you get yours?! 
Am hearing from some clients that the Google Earth plugin is NOT, I repeat NOT working with Firefox 3 on Windows… doesn’t work at all for all of us on Macs, but that is another issue… So if you LOVE LOVE LOVE the GE plugin, then I’d wait a few weeks for Google to get this working properly.