Who is Hosting this Website is a free Firefox add-on designed for web developers and IT professionals. This tool allows users to easily identify the hosting provider of any website with a simple click. It displays detailed information including the web server type, IP address, and DNS records such as MX, A, and NS records. Additionally, it provides Whois records for domain ownership, enhancing its utility for users needing comprehensive data about website hosting.

The add-on integrates seamlessly into the Firefox browser, adding a convenient button for quick access. Users can share hosting information on popular social networks using the 1-click share feature. While the tool aims for high accuracy through proprietary algorithms and multiple data sources, it's important to note that 100% accuracy cannot be guaranteed. Overall, this tool serves as a valuable resource for anyone interested in understanding website hosting details.