After the most recent update, my pinned tabs and tab groups do not restore when I open Firefox, even though I have "Open previous windows and tabs" checked on settings. I've gone through some responses to other posts with the same issue, and I am able to recover a window that still has the original tabs and tab groups, and it works fine. But again, when I close Firefox and restart it, they are all gone again. It's a pain in the b*** that the workaround is to keep navigating to previous windows and finding one that works, over and over again. Surely there's a way to restore the functionality of the tabs and tab groups so they don't vanish every time you close Firefox.