I have to disagree. In my case, bookmarks are the place where "tabs" go to die. I use Tree Style Tab addon, and tabs (mostly self-)organize as I surf, do research on different topics and whatnot, and I jump in with a window title changing addon or grouping parent tab. I cannot even imagine using a browser without it. But bookmarks do not preserve any of that relational data. Session managers are also luckluster solution at best, because merging a few tabs, a tree or window with existing session is clunky at best. After many years of frustration, I have started working on my own tab syncher/organizer.

Bookmarks are only the coldest of storage for me, with exception of bookmarks bar where I place often accessed web sites.

"Ahhh, finally I got you bug: I saw this just the other day when I looked at x" works so much better when x is an organized as a tree of tabs, in the memory of my browser, a short scroll and a click away instead of having to hunt through bookmarks reloading all of them in hope of figuring out which one it was.

At least with the work I do it isn't alway obvious what is going to be useful or not. But while I don't have a photographic memory (quite the contrary) I'm often able to figure out approximately where to look and also able to find it there.

I'd even recommend you try it. If it works for a simple farmer turned engineer like me, think what it could do for a smart person like you! ;-)