I installed firefox 2 tonight and I (of course) like it. Nice, subtle but noticeable interface upgrades and of course the welcomed addition of a spell checker!
I also had a look at the Yahoo del.icio.us firefox extension. I’m not sure how long this has been around, the URL based link in my toolbar had done the job fine so far but I thought I’d have a look.
I use del.icio.us often and have always thought it’d be cool to integrate del.icio.us directly to the Bookmarks menu. In fact a friend of mine is writing a simple browser using the Mozilla active x control I have previously mentioned and this is something I said he should do. Well, the Yahoo extension does exactly this, making bookmark management that much easier and the roll back (exporting from del.icio.us to your bookmarks menu on uninstall) works perfectly.
Firefox also provides easy RSS integration to add a feed to your favourite reader. I configured mine to subscribe feeds to my blog lines account, again, much welcomed!
I havn’t had much of a change to look at any other new firefox features yet.