If I really wanted to keep a record of all the sites I've been to for historic reasons like this person there are far easier/better ways to do that. I'd even set it up to download a local copy of the sites I visit so that they'd be there even if the sites went offline. I have 298 tabs across 8 windows open right now and I can already tell firefox is about to crash at any moment. I go to about:memory and mash the butt…
I have Firefox set to reopen tabs when it starts and, on the very rare occasion it does crash or the power goes out, the tabs are back when I reopen Firefox.