Well, 1.0 is targeted for September, if you want to wait.
Here's the
Mozilla Firefox 0.9.1 Release Notes, which do recommend an uninstall. But your profile will stay the same, so don't worry about all the settings.
You can find compliant extensions at
Mozilla Update. I really like MakeLink, which allows me to easily put these links into these threads without fiddling with BBcode.
Yeah, I'm obsessed. I've been doing nightlies since it was Phoenix 0.4.