Search by Image on Google is a Firefox extension designed to enhance image searches directly from the browser. By simply right-clicking on any image, users can initiate a Google search for related images or find different size versions of the selected image. This functionality streamlines the process of locating similar visuals or higher resolution images, making it a valuable tool for anyone who works with images frequently.

This extension is lightweight and user-friendly, requiring no additional permissions, which ensures a seamless integration into the browsing experience. Users also have the option to decide whether the browser should automatically switch to the newly opened search tab, providing flexibility according to personal preferences. Overall, it serves as an efficient solution for quick image searches without the hassle of navigating away from the current webpage.