Just adding my use-cases here as well. In my case I can't change the state of my tab-groups anymore. In general this tab groups feature is very flaky. Bug-Case - As soon as I delete one or more tabs in a tab group and switch to another tab group and switch back. My deleted tab directly reappears. Bug-Case - As soon as I change one or more tabs in a tab group and switch to another tab group and switch back. My changed tabs are in back to the previous state (independently if I just browser to another url on the same domain OR switched the tab do another domain) Bug-Case - Sometimes when I switch between tab groups the current active window (or last tab in the open tab-group) gets transferred to the new selected tab-group. Bug-Case - When opening a new tab in a tab-group and using the "search" inside the adress-bar my browser switched to a random tab in a random tab-group and my input within the address-bar vanishes.