I have a gazillion tabs open, and I try to work through my tabs once a day to see what I can delete without losing information I want to keep and what I think is valuable enough to add to my notes in some way.
I'll look for a note that already covers the idea and add the URL and a quick summary. If a note doesn't exist, I'll add the core idea that interested me about it as a new note with the idea(s) summarized in my own words (maybe 1-3 sentences), then a reference in that note to the URL. I also try to summarize the link from memory instead of reading through it again. I'll only check the link's contents if I'm having trouble writing anything. If I'm feeling particularly productive, I might add any quotes or particular passages I remember as well (paraphrased, of course, I don't have an eidetic memory).
I've made a huge dent in my open tabs so far and I'm fairly happy with my progress in the past week.
edit: I briefly saw another comment about using OneTab (sorry, I haven't had the time to read any of the other comments yet) and my current attempt is partly based on how unhappy I am with OneTab. The addon itself is brilliant, but I've realized that I'll just save all the open tabs and then ... well, that's it. They're basically bookmarks again and it's like an information blackhole for me.
edit2: I'm currently using Obsidian.md. Not bothering with directories at the moment, because I haven't yet decided how to organize my notes.