I've been messing around with the different alphas and betas of Firefox, including FF3.1b2 released yesterday.
Sorry to announce that Mozilla still has not fixed it. If you have no idea what I'm talking about, please refer to my previous posts where I detailed the problems here and here.
This extends all the way to the Minefield nightly builds, and Shiretoko builds as well.
Mozilla - PLEASE - fix AppleScript support. I realize AppleScript has never been a priority, but hey, it works in 2.x but it was broken (regression) in 3.x and it messes with workflows and other apps as well.
In the mean time, Safari has been working well; however, it has begun choking on sites like reuters.com while something loads in the background. Takes about 40-50 seconds.