Boost YouTube is a free Firefox add-on designed to enhance the multimedia experience on YouTube. It offers several features aimed at improving video playback and navigation. Users can view the resolution and playback speed in the upper left corner, ensuring they have quick access to this information while watching videos. Additionally, when in fullscreen mode, the add-on can switch videos to their native resolution, optimizing the viewing experience.

Another notable feature is the ability to hide the video title and player controls by moving the mouse pointer to the left edge of the screen while in fullscreen mode. This allows for an uninterrupted viewing experience. Moreover, users can open video thumbnails in a new tab and utilize a convenient shortcut (Alt+Y) to open YouTube in a new tab, making navigation more efficient.