Of course the tabs would just come back up next time they open the browser window again. Can’t risk losing those precious tabs, there might be an important one among them.
Signed, a tab hoarder.
As a previous tab hoarder, excessive use of bookmarks is the answer. Organized is more useful, but even a single bookmark folder for all of your “I’ll need this later” tabs will do wonders for you, and being a bookmark hoarder is so much more functional than being a tab hoarder. You can actual reset your browser every once in a while.
Bookmarks are not a safe way to store links, as I have learned. Every URL can only be present in a single bookmark, and an addon can mess it all up if it decides to create new bookmarks for links that you have already bookmarked. It’s location (the bookmark directory) and tags are lost, and if the addon decides to delete the bookmark that it has made, the link itself is lost too.