Firefox Sync is a feature offered by the Mozilla Firefox web browser that allows users to synchronize their bookmarks, history, passwords, and open tabs across multiple devices. By creating a free account, users can access their personalized browsing experience on any device where Firefox is installed, whether it's a computer, smartphone, or tablet. This service enhances convenience and productivity, as users can seamlessly switch between devices without losing their saved information. Additionally, Firefox Sync prioritizes user privacy and security, ensuring that data is encrypted during transmission and storage, making it a reliable choice for those who value their online safety.