I had about 200 tabs open in about 15 tab groups. Needless to say, Firefox wasn't lightning fast (even with the "don't load tabs until selected" option checked). The solution that dramatically improved my browser performance was simple: I started using bookmark folders instead of tab groups. When I want to switch to a different set of tabs, I bookmark my current set, close all the tabs and then open a new set.
The problem is, it's pretty inconvenient. I'm looking for an extension that would make the whole process more automatic. Ideally, I'd like to have a simple toolbar button with drop down menu which would show me all my tab groups - clicking on them would switch my tab set. Moreover, it would be awesome if it would synchronize my open tabs to my bookmarks, so when I open/close a tab it would automatically update the bookmarked set. Of course, it doesn't have to use bookmarks, it can be some other database.
Is there an extension that suits my needs? If not, maybe some other browser has this feature?
I've just found Taskmark for Chrome. It does exactly what I want. Is there something similar for Firefox?