Repeated had I over 100 tabs open, maybe even over 200, in which and on which I had to continue working, by going back to each open tab, then repeated times Firefox crashed, and while sometimes not, but mostly offered an option by restart on clicking on the Firefox icon to reopen, to be opened fresh or to reopen all last open tabs, and by closing Firefox, while under such much open tabs, on next click on the Firefox icon to reopen, all last open tabs was again still open, and needed only to be jumped back to each of them, to continue working on each of them, but now repeated, after closed Firefox, and reopened it again by clicking on the Firefox icon to reopen, all last open tabs (over 100 tabs open, maybe even over 200) are disappeared, and Firefox opened with a single blank tab, and all my browser history is deleted down to only a very short browser history of only few last opened websites, the only few last opened websites.

I see this as a(n intentional) (criminal) (business) (and personal) treat and sabotage (against business and personal grow) with heavy criminal (business and personal) industrial espionage surveillance behind and will act legally them against to the maximum extend by law.