Search by Image is a free browser extension for Firefox, designed to facilitate reverse image searches across more than 30 different search engines. This open-source tool is especially beneficial for journalists and researchers who need to verify image authenticity and combat misinformation on social media platforms. Additionally, it serves photographers by helping them track how their images are used online, while shoppers can discover similar products at lower prices.

The extension allows users to initiate searches directly from the context menu or browser toolbar, with customizable options for search engines. It supports various search modes including selecting images from the page, capturing areas, or uploading images from local storage. The flexibility of these features makes Search by Image a valuable tool for anyone looking to enhance their online image searching capabilities.