And although Firefox 4 isn’t officially released until tomorrow, copies have leaked out via FTP staging servers. I grabbed a copy from betanews to do my upgrade early.
I’ve played with pre-release versions, so no real surprises. It’s quick. The look changed quite a bit, but you can easily configure it to look like older versions if you want. I did on my desktop; on a netbook I might not.
I like it, but I was using it when it was still a side project called Phoenix. Then it was Firebird. Then it became Firefox.