Simple Tab Groups - https://addons.mozilla.org/en-US/firefox/addon/simple-tab-groups/ https://addons.mozilla.org/en-US/firefox/addon/simple-tab-gr... It is wha

Simple Tab Groups - https://addons.mozilla.org/en-US/firefox/addon/simple-tab-groups/ https://addons.mozilla.org/en-US/firefox/addon/simple-tab-gr... It is what Firefox Tab Group / Panorama should always had been. It makes tab groups backup periodically so you will not loose them. I used this once to move tabs to a different computer, but it's good to know it's there. It also integrates with Tab Containers if you want it.