HooverZoom is a Firefox add-on designed to streamline the viewing of media content by displaying full-size images and videos directly upon hovering over links. This subscription-based tool is particularly beneficial for users frequenting media-rich platforms like Reddit, allowing for quick access to visual content without the need for additional clicks. Its features include dynamic loading of images with specific site handlers, navigation through photo albums using mouse wheel and arrow keys, and the ability to load MP4 videos in place of GIFs, providing a faster and more efficient viewing experience.

The add-on also includes options to add links with shown popups to the browser history, although users may need to log in with a moderator account on Reddit for optimal functionality due to recent API changes. To experience the effects of HooverZoom, users must refresh previously loaded pages after installation. Additionally, for maximizing popups, users can adjust settings in the options page. However, some cross-domain videos may face loading restrictions, which can be managed through specific browser configurations.