I just downloaded Mozilla Firefox 1.0 PR, and like BigJim I’m liking the new Live Bookmarks feature immensely—it reminds me a bit of the approach David Janes took with BlogMatrix Jäger, but the Mozilla approach is significantly less featureful (for starters, I can’t see any way to go to the root URL specified by a feed, and it doesn’t keep track of what you’ve read in any way that I can tell; nor does there seem to be a way to add a RSS feed without a LINK element—so I can’t add the Chronicle of Higher Ed feeds). On the other hand, it’s integrated in the browser nicely, and you can put a folder of feeds in your Bookmarks Toolbar, and use the menu to surf posts seamlessly (so it doesn’t take up real estate when you’re reading), or you can open the “Live Bookmarks” in the sidebar. And it does have Atom support, which is nice. So, for now, I’ll give it 3 out of 5 stars.
In other changes, it looks like Gtk theming has changed slightly yet again, and apparently the “disappearing cookie” bug has been somewhat, but not totally, squished. And it does seem a little more zippy than 0.9.3 did on my Linux box (though that could just be due to the Mozilla.org builds being i686 builds, as opposed to Debian policy-compliant i386 builds). So it seems like a worthwhile upgrade.