Perhaps it’s time to attempt removing the Start New Session button again, or replacing it with a link? Both are good ideas. Both would have saved the 10 or so Panorama groups, each with lots of tabs, that I have now lost, apparently irreversibly.
("Back" no longer has any effect on any of the tabs I still have; "about:sessionrestore" is blank.)
Perhaps it’s time to attempt removing the Start New Session button again, or replacing it with a link? Both are good ideas. Both would have saved the 10 or so Panorama groups, each with lots of tabs, that I have now lost, apparently irreversibly.
("Back" no longer has any effect on any of the tabs I still have; "about:sessionre store" is blank.)
This UI issue + Panorama = major data loss.