The Mozilla Project has posted the first release candidate of Firefox 2.0, New features in 2.0 include:
- Anti-Phishing Protection.
- Search suggestions now appear with search history in the search box for Google, Yahoo! and Answers.com
- Scrollable tabs
- Ability to re-open accidentally closed tabs
- Better support for previewing and subscribing to web feeds
- Inline spell checking in forms (ironically the first word it flagged for me as misspelled was "Firefox")
- Search plugin manager
- Microsummaries feature for bookmarks
- Automatic restoration of your browsing session if there is a crash
- New combined and improved Add-Ons manager for extensions and themes
- New Windows installer
- JavaScript 1.7
- Client-side session and persistent storage (a really hideous idea, sure to be misused)
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It's not immediately clear what's changed since beta 2, but presumably bugs were fixed. I've been using Forefox 2 as my primary browser since beta 1, and it's been pretty smooth over all.
The inline spell checking is indispensable, and worth the upgrade alone.
The only problem I've encountered is that Chris Pederick's Web Developer plugin doesn't yet support FireFox 2, so occasionally I have to drop back to Firefox 1.5 to use it.
Hopefully that will be updated soon.