Save Tab Group от fstephens

Save tabs to a group for later use, research, etc. The group is by default named with today's date, but you can choose another name, or rename it later. Links can be stripped of tracking data and duplicate links removed.
Groups (or all groups) are searchable, and can be exported or imported.
In addition, you can copy or move links to another group, or all or selected links can be bookmarked. There is also an undo function, but please read the help page.