Improve YouTube is a Firefox extension designed to significantly enhance the YouTube video watching experience. It offers over 175 unique features that allow users to customize their video player, filter content, and tweak the layout and themes according to their preferences. This open-source tool is lightweight and applies most settings without requiring a page reload, ensuring a seamless user experience.

Among its many functionalities, Improve YouTube allows users to block unwanted videos, manage playback settings, and customize visual elements such as themes and ambient lighting. Additional features include enhanced video playback options, screenshot capabilities, and the ability to control video quality and playback speed. The extension is designed for both desktop and mobile platforms, making it a versatile tool for any YouTube user looking to improve their viewing habits.