A few years ago Firefox had Simple Tabbed Groups (it was wonderful) and then Mozilla changed the Firefox code to be modern/more secure but it ended Add-ons like the old Tabbed Groups. That upset me I lost 4-5 tabbed groups with a total 81 links, just gone. Over the years I looked in the Add-ons for a replacement for Simple Tabbed Groups but nothing until recently. I looked at this Add-on and I said No, it can't be, but yes it is. I do not know if it is the same coder but thank you. I've got 3 groups and growing.