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.

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 create folders by file extensions on Windows 11/10. You can sort files by extensions or formats using this guide.

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.