If you find yourself doing repetitive tasks in your browser, it may be time to try writing an extension for Chrome or Firefox—with just minimal coding knowledge required.

Using your favorite text or code editor, create a file in that folder called macworld.css. Once the file’s in place, switch back to Safari and the Extension Builder window.

Note: When you create a new Chrome extension, you normally need to provide several types of files, depending on how complex it is.

Learn how to rename all file extensions in a folder & sub-folders at once on Windows 11/10. You can batch rename or rename all file extensions in bulk using this guide.

Whether it be because you suspect a Chrome extension is malicious, you want to create a backup of a favorite and discontinued extension, or you just want to see how the extension works, knowing ...