I've been using the Simple Tab Groups extension [1] in Firefox for some time, and to my taste it's the best option out there. [1] https://github.com/drive4ik/s

I've been using the Simple Tab Groups extension [1] in Firefox for some time, and to my taste it's the best option out there. [1] https://github.com/drive4ik/simple-tab-groups https://github.com/drive4ik/simple-tab-groups