Flagfox is a Firefox extension designed for web development and IT professionals, offering a visual representation of the physical location of the current web server via a flag icon. This tool enhances awareness during browsing by providing insights into the server’s location, native languages, and applicable legal jurisdictions. Users can access various external lookups and customize actions that can be added to the flag's context menu for quick access. The extension is lightweight and unobtrusive, ensuring minimal resource consumption while maintaining functionality.

The tool's primary feature is its ability to load a geolocation tool that provides detailed information about the server's location, including local time and ISP details. Flagfox further supports a wide range of additional actions such as site safety checks, automatic translations, SEO research, and diagnostics. It prioritizes user privacy by performing country lookups locally, utilizing an internal database for accurate geolocation, and receives monthly updates to ensure data accuracy.