Extension Sync is a free browser add-on that allows you to synchronously manage your Chrome and Firefox extensions through Github's gist. With this tool, you can easily migrate your extensions from one computer to another when you install the Chrome or Firefox browser on a new PC.

To get started, simply login with your Github account and authorize Extension Sync. Once logged in, you can click the "Sync to Github" button, which will send the data of your locally installed extensions to your private gists on Github. This ensures that your extension data remains secure and accessible only to you.

When you have a new PC or want to reinstall your browser, simply login to Extension Sync with the same Github account and synchronize the data to the new browser. This way, you can effortlessly have all your favorite extensions available on any computer you use.

Extension Sync is a convenient and efficient tool for managing your Chrome and Firefox extensions, making it easy to keep your browser experience consistent across different devices.