I use histre (http://histre.com) to accomplish this functionality, not only within Firefox but across browsers, computers, and even colleagues.
My favorite feature is being able to save all tabs within a window, send a link to a co-worker, and have them open up all the tabs. It takes like 5 secs, end to end.
Best of all: if they have the histre extension as well, they can instantly open all the tabs at once and even see my highlights - it’s like being able to send a browser window state to another person!
Thanks! I work on https://histre.com/ and lot of users say that this feature is very useful to them. Many of them say that they use separate windows for each thing they're trying to do, and before you know it you have 10 different windows with a lot of tabs each. You can save the states of all of them and restore them selectively, as you said. https://histre.com/features/save-restore-tabs/
Bookmarks are too primitive imho. It is typically treated as just one link. It is useful to know the whole context around that. How did you get there? What else where you researching? Histre saves all that for you in a tree-style history.
On the other end of the manual work spectrum is elaborate note-taking about everything ("second brain"), keeping that organized enough to be useful etc, which takes too much time for nebulous benefit.
Histre takes care of all your knowledge management needs without making you do busywork.
My favorite feature is being able to save all tabs within a window, send a link to a co-worker, and have them open up all the tabs. It takes like 5 secs, end to end.
Best of all: if they have the histre extension as well, they can instantly open all the tabs at once and even see my highlights - it’s like being able to send a browser window state to another person!