Today I've opened Firefox to find out it has been reset to it's default settings. This is a PC we use at work that recently had an issue with malware and adware and I had to remove several Add-Ons and other undesired settings they left (but the first reset occured automatically). That being solved, I try to log in to Firefox Sync in order to restore my previous settings, bookmarks, etc. But now, when I try to access about:accounts it's just a blank page. The blue spinning wheel appears and it gets stuck there. I also attach a screenshot of Firefox's welcome screen after a second refresh I attempted to see if that solved the problem, which also shows the same loading icon. I've already tried using Safe Mode without success. I've also performed a full scan of my PC and no other viruses were found. Thanks in advance for any help.