First Party Isolation

This browser add-on provides a straightforward way to enable **First Party Isolation (FPI)**, a robust privacy-enhancing feature originally developed for the Tor Browser. FPI fundamentally changes how your browser handles data by **tying all browser identification sources**, such as cookies, cache, and other storage mechanisms, exclusively to the website domain you are currently visiting (the 'first party'). This means that data stored by one website cannot be accessed when you visit another, effectively **preventing third-party services embedded on websites from tracking your activity across the web**. It's a more comprehensive privacy protection than standard third-party cookie blocking, offering a deeper level of isolation against pervasive online surveillance. The extension is **open source**, allowing anyone to inspect its code for security and transparency. Activating or deactivating FPI is as simple as clicking the add-on's icon, giving you easy control over this advanced privacy setting. This tool does not collect user data; its sole function is to manage the FPI browser preference to enhance your online privacy.