Missing tabs
All my tabs disappeared. I did not update Firefox or shut down the computer. All I did, which is what I always do, is empty history and close firefox, then put computer to sleep. This has happened before and is very disappointing.
Krejt Përgjigjet (1)
On Mac closing Firefox can be more complicated because you can close all open windows, but keep Firefox running with the menu bar visible or minimized in the Doc.
Make sure to use "Quit Firefox" with all windows still open, especially if you want to use "Restore Previous Session". Otherwise check "History -> Restore Previous Session" and "History -> Recently Closed Tabs/Windows".