I do tend to let tabs accumulate, but then I turn off my PC at the end of the day and let all tabs fall into the void.

I like to start the day with a blank slate. Which seems to be such an uncommon thing to do that I couldn't convince FF on my last few Linux installs not to restore tabs when reopening. I've changed the obvious settings for it, I've set the flags in about:config, I've even completely disabled crash recovery and related features. It would still always reopen the last session