FF has been driving me crazy lately.
Every other day it blows away all my open tabs and whatever I had going on in them.
I have a bunch of random tabs open, some with essentially "unsaved work", like shopping carts which may be the result of an hour of research, editing files in web interfaces like github or fluidd (web interface to a 3d printer) ... and randomly once every day or 3, I'll go to touch anything, any button in any of those tabs, like edit that config file some more, or try to save it... and kablooey, "firefox needs to restart" and I lose everything I had going.
This is a new thing that didn't used to happen.
Apparently the snap teams response to this story would be "Don't use FF like that."