Everyone favourite browser (well, mine anyway), Firefox, has now got even better tab handling. You can now tell Firefox to open new tabs when external applications try to open a new page. Yay! :)
Now there's no need to install extensions to deliver this feature (TabBrowser Preferences, TabBrowser Extensions and Single Window all provided similar features).
It's currently in the daily builds but is looking good for the 1.0 release.
Chu Yeow covers the issue in more detail at redemption in a blog.
PS If you're not using Firefox, why not?! As far as I can see it's better than IE in every way...please comment if you've tried it and 'gone back'!