Group-tab addon for firefox

"I just installed Tree Style Tab on Firefox 3.5.2 (OS X). It's rather sweet! It gives you a hierarchical tab bar on the side of your browser window (which you can set to auto hide).

It doesn't look like it supports manual tab renaming so you'll have to use, say, google.com as your gmail/cal/reader/analytics/etc. holder.

Thanks for asking the question; wish I'd thought of looking for an add-on like this sooner."

I went to the Firefox Add-ons site, searched for keyword "group" in the "Tabs" category, and got back a bunch of add-ons that should work for you: addons.mozilladotorg/en-US/firefox/search?q=group&cat=1%2C93. I'm not sure which one specifically you're after, but it should appear in that list somewhere.