Invert Colors is a free Firefox add-on designed to help users customize their web browsing experience by inverting the colors of web pages. This extension features a convenient Toggle Button that allows for easy activation and deactivation of the color inversion effect. Users can also leverage hotkeys for quick access, with global options available using (alt+shift+r) and specific options for the active tab using (alt+r).

This add-on enhances web page visibility and accessibility, making it ideal for users looking for a different visual experience. However, it is important to note that Invert Colors is not compatible with Firefox for Android due to API limitations. Overall, this tool offers a simple yet effective way to personalize the aesthetics of websites.