If you need quick access to this many pages I suggest organizing bookmarks. As this is what they are meant for. Tabs are meant for active pages you are working with. So anytime you get that many tabs with any browser its gonna run like shit.

I find organizing bookmarks incredibly tedious. I have bookmarks folder with thousands of tabs in and it’s just easier to use google again to re-find the information than to pick them out of bookmarks. Also tabs just keep the title and URL so you can’t even search the text inside. So, organizing a library of tabs is like a much worse version of google without previews. I also use the session manager addon but again, when you open thousands of tabs, it clogs up the memory almost instantly. It’s taking multiple gigabytes of ram, just to display a few kilobytes of text ! I wish the browser would just render the page as a static searchable text and image and then ditch all the javascript garbage.