Personally I love the feature, but I really feel like window managers/desktop environments should be handling window tabs. Imagine your desktop handling all tabs across all programs the same exact way instead of being reimplemented differently for each program. You could window switch to Firefox with alt-tab, add a ctrl- to your key combo and cycle through tabs in that window. Or imagine typing the title of a tab in your desktop's searchbar and being taken directly to it.

At the very least it'd make managing 100+ open tabs more feasible.