Bigger Theater Mode is a Chrome add-on developed by Gerald G. Gehrke. This free extension aims to enhance YouTube's Theater mode by increasing the size of the video player while still allowing users to view other useful information on their desktop.

If you find YouTube's Theater mode to be lacking in terms of video size and distracting recommendations, then this extension is for you. Bigger Theater Mode provides a small CSS tweak that allows your videos to be larger and easier to view in the browser. With this add-on, you can focus more on the video you are currently watching without being distracted by irrelevant content.

Give Bigger Theater Mode a try and enjoy a more immersive viewing experience on YouTube!