> A friend of mine keeps basically infinity tabs open. I sort of rolled my eyes, but accepted his rare behavior.

For those in the comments who are like myself (and parent's friend) and have hundreds or even thousands of tabs open, I highly recommend the Panorama Tab Groups extension for Firefox:

https://addons.mozilla.org/en-US/firefox/addon/panorama-tab-...

This extension adds back in the functionality that was removed from Firefox half a decade ago. It gives you a visual, 2D-map of arbitrary groups of tabs in a tile layout you can view with "Ctrl-Shift-F". Combined with the backup feature (just in case it crashes or gets corrupted, although this has yet to happen to me) and Firefox's built-in tab session saving option, so long as you have enough memory (I bought 40 gigs of RAM for this laptop after terrible memories of running Firefox on a Chromebook with 4GB of soldered RAM), you can basically browse as though you'll never have to close a tab again, AND also be able to stay organized.