I'm not much of a bookmarks guy, but I used to have the same problem 4 years ago when I used Facebook. I would find an interesting video or article, save it (very similar to bookmarking it but within Facebook), and then forget about it. Facebook even reminds you every couple of weeks that you have 10 saved articles that you haven't read.
And then it happened again with Reddit. Same thing: I save an interesting comment or post, and then never see it again. I sometimes go back to get a specific comment, but it takes forever to find it. So my solution was to make it some type of game. I find time every month to just attack those saved posts and comments, and check them out 1 by 1. Some of them are either videos that I couldn't watch at the time, or articles I thought I should read later. I watched the videos, read the articles, and then unsaved the posts. If their is a post I think there is a big chance I'll go back to again, I'll keep it saved.
After took me a couple of sessions to go through all my backlog, but after every session, I learn so much, probably laugh a lot as well, and my bookmarks are kept to an absolute minimum.
So yeah, no extension will help you, I'm sure more than half of your bookmarks are a one time read, many are also not interesting to you anymore, and those you really want to keep are less than a hundred.
And then it happened again with Reddit. Same thing: I save an interesting comment or post, and then never see it again. I sometimes go back to get a specific comment, but it takes forever to find it. So my solution was to make it some type of game. I find time every month to just attack those saved posts and comments, and check them out 1 by 1. Some of them are either videos that I couldn't watch at the time, or articles I thought I should read later. I watched the videos, read the articles, and then unsaved the posts. If their is a post I think there is a big chance I'll go back to again, I'll keep it saved.
After took me a couple of sessions to go through all my backlog, but after every session, I learn so much, probably laugh a lot as well, and my bookmarks are kept to an absolute minimum.
So yeah, no extension will help you, I'm sure more than half of your bookmarks are a one time read, many are also not interesting to you anymore, and those you really want to keep are less than a hundred.