Theater Mode for YouTube is a Firefox extension designed to automatically set the video player to theater mode, enhancing your viewing experience. This tool ensures that every time you visit YouTube, the player defaults to a wider screen format, providing a more immersive experience without the need to log in. Users can easily revert to the standard mode by clicking a button or using a keyboard shortcut, maintaining flexibility in how they view content.

This extension operates without any configurable options, seamlessly integrating into the YouTube interface. It utilizes cookies and automated button presses to ensure the theater mode is activated on each visit. For use in incognito mode, users must enable the extension specifically for that browsing mode. The extension is simple to install and begins with an FAQ page, which includes a Google Analytics code for tracking purposes.