Do you ever miss the upside of all that persistence? I find my history useful, I find continually re-logging in a pain (obviously excepting the kind of sites where I don't want my login to persist i.e. financial etc).

However I also only close my browser once every couple of weeks as well. System updates etc.

that is the beauty of it. You can disable. Be glad you have firefox and not only IE or chrome (where you can't disable all the things)

But for 99% of the users, they want it.

Heck, anecdote for anecdote: the very first thing i do on new machines is to open up firefox, go to settings, set the browser to startup with my previous session's tabs.