Whereas my ADHD has me keeping huge numbers of tabs open (although my record is only ~350) because once it's closed, it's completely gone from my mind. Bookmarks are a burial ground, and history has all the other stuff that I don't need to reference anymore. With tabs, I can go through them and remember why I kept it around, and close it once I've actually done something with it.
Firefox Power User Keeps 7,400+ Browser Tabs Open for 2 Years (pcmag.com) en