[j1elo]

I use the Tree Style Tab addon in Firefox for exactly that purpose. The addon doesn't have the concept of named groups, it is just an extension to organize tabs in a tree... but that's more than enough.

Starting with a keyword search on the parent tab, all subsequent links are opened in child tabs that can be expanded / collapsed. When collapsed, the parent tab's title are the keywords, so it's a nice visual way to have the whole sub-tree "filed" into a single named entry.

There are even a couple extras that allow me to long-middle-mouse-click a parent tab, and it unloads from memory the whole sub-tree. It's a pretty neat addon!

[slightwinder]

> The addon doesn't have the concept of named groups

Actually, it has, but it's seems to lack UI-Integration for whatever reason. I use this bookmarklet for some years not to create a Group-Tab:

javascript:(function(){window.open("ext+treestyletab:group?title=NewGroup&temporary=false")})();

To rename it, just click the title inside the group-tab.

[nerdponx]

It would be nice to have nodes in the tree that don't actually correspond to tabs though. For this specific use case of grouping.

[hashhar]

I've got the perfect gift for you - https://addons.mozilla.org/en-US/firefox/addon/tst-more-tree... A companion extension to TST by the original author.