I recently had to completely remove and reinstall Firefox to my PC. I had problems with the browser constantly freezing. However when I accessed the synced tabs (after reinstalling) I realised, I had two lots of synced tabs coming from the same PC. One lot is from what was on my PC, before I removed Firefox and the other is the current tabs (on the same PC after reinstalling Firefox). When I went to https://accounts.firefox.com/settings I saw that I had duplicate devices for my PC. I deleted all of them and then had to sign in to Firefox using my PC. I renamed my PC so as not to cause confusion with the old synced tabs. Problem is my synced tabs from before, are still showing even though I removed the device from Firefox Accounts. I have tried syncing all my devices again but the old synced tabs won't budge even though I deleted that device. I even went to the Synced Tab Sidebar to tap on "Synchronise Now" for the "deleted" device but that also did not help. Is there a way to remove it? Could it be something to do with my Firefox profiles? Any help would be appreciated.