Browser Video Tuner is a free Chrome extension developed by M3D. As the name suggests, this extension allows users to change the size and aspect ratio of videos directly in the browser. With just a few simple steps, you can customize the video playback experience according to your preferences.

To use Browser Video Tuner, start by playing the video you want to modify. Then, click on the extension icon located in the browser toolbar. This will open up a menu with various options. Next, expand the video to full screen for a better viewing experience. Now, you can easily control the video size and aspect ratio using the on-screen display (OSD) menu.

With Browser Video Tuner, you have the flexibility to adjust the video size and aspect ratio to suit your needs. Whether you prefer a larger display or a specific aspect ratio, this extension provides a convenient solution for customizing your video playback in Chrome.

Please note that Browser Video Tuner is specifically designed for Chrome and is categorized under the "Add-ons & Tools" subcategory of browsers. It is available for free and can be easily installed from the Chrome Web Store.