Cookie Copier is a Google Chrome extension that simplifies the process of copying cookies between domains. With just a few clicks, users can conveniently transfer cookies from one domain to another. This extension is particularly useful for web developers and testers who frequently work with multiple domains and need to transfer cookies for testing purposes.

The main feature of Cookie Copier is its ability to extract the list of domains from the open browser tabs. This means that users do not need to manually input the domains they want to copy cookies to or from. The extension automatically detects the active tabs and allows users to easily select the desired domains for cookie transfer.

Overall, Cookie Copier is a straightforward and efficient tool for copying cookies between domains in Google Chrome. Its simplicity and seamless integration with the browser make it a valuable asset for web developers and testers.