Tab Groups in Firefox 3.5 Solutions?

What about using the little button on the right of the tab bar. It will list the full titles of all your open tabs. Example

3.5 broke a lot of add-ons. If the add-on you really like is broken now it should be updated soon, granted it’s developer hasn’t given up on it.

https://addons.mozilla.org/en-US/firefox/addon/6543

That will probably get your old extension working. You can turn off compatibility checking.

Sorry I can’t answer—but I add my request. Tabs can be saved as a group of all open ones—but as far as I know, no way to select say, 6 tabs from 40 open ones, to make a group that opens & closes together.
In tab kit one can sort by opener or domain, or move around, but that’s not the same as some topic-defined cluster. Is that what you mean? Would seem one of the first things developed. Wish I knew how. Surely more people would find that useful?