Firefox is a popular web browser and it’s one of the most used browsers in the world. It’s also one of the most popular browsers on your computer. But there are some ways to stop Firefox from syncing with your computer. You can use a firewall to protect your computer from being infected by viruses and malware, or you can use a privacy protection software like Windows Defender to keep your personal information safe. You can also try disabling Firefox Sync in Firefox, or using another web browser that doesn’t have Firefox Sync enabled.