Hello, I use the add-on Simple Tab Groups and have been very happy with it so far! However, yesterday, I was moving some tabs from one group to another when I suddenly noticed that all my tab groups were empty! No idea when this happened as I had been working in one group for a while. The group I'd originally been working in was also empty after I'd closed it to check on others. Could this have happened due to the Firefox update on 25 November? AIs there any way I can recover my grouped tabs still? Thank you, Marieke