The WebP/AVIF Image Converter is a Firefox add-on designed to facilitate the conversion and downloading of images directly from the web. Users can convert images to various formats, including JPG and PNG, using a simple right-click context menu option. The add-on allows for customization of conversion preferences, download locations, and filenames, making it a versatile tool for managing image files efficiently.

Advanced features include the ability to perform actions with optional modifier keys, configure popup layouts for quick access, and download files in incognito mode to prevent clutter. Users should note that the converter relies on the actual file data for determining file types, which may lead to unexpected results if solely based on URLs. Overall, this add-on streamlines the image downloading process while providing useful customization options.