Same issue. Except multiple short-term projects with hundreds of reference tabs, in multiple windows, ranging from groups that would classify as "mood boards" to research.

I settled for Workona when it launched about 2+ years ago after trying many extensions else like OneTab, SessionBuddy, Toby and so on.

I might start looking for something else again as Workona is getting a bit more, commercialized, but it's fine for now.