NOTE !!!!!! 1. This add-on only maximize video, it can't remove web advertisements for you. If you need remove web advertisements, you can install other add-on to do that. 2. No promise to support EVERY video site. If it can't work on specific web site, report to me: https://github.com/ettoolong/MaximizeVideo/issues I will try to fix it ( if I can). Usage: 1. Click on toolbar button 2. Select video that you want to maximize (you can click toolbar button again to cancel)