I discovered your extension trying to use it on an Amazon Fire HD 10. I installed Firefox Nightly and the Tab Rotator extension and on the browser menu and option appeard which reads "start rotating tabs". Everything look fine up to here, thing is once configured and saved it never starts!
I downloaded Firefox on my PC to understand how the extension works and I already saw it works beautifully.
I am trying to use this Fire HD 10 as a kiosk/display for some custom URLs incluging Trello Boards, Airtable bases, etc. Is there any way you think I could make this work? Or any reason why tabs aren't rotating on the HD 10?
Please let me know if there is anything I can do, I am super interested in this working out. Best and congrats on an excellent add-on!