Hello there! As a Firefox Support Forum contributor, I'd be happy to help you with your Firefox Sync issue on desktop. Could you please provide some more details about the specific problem you're experiencing? The more information you can provide, the better I can assist you in finding a solution. Feel free to share any error messages, steps you've already taken to troubleshoot the issue, and any relevant details about your operating system and Firefox version. This will help me understand the context and provide you with the most accurate guidance. Looking forward to assisting you!