The last official version of Firefox to support Windows XP is .
You can find the Firefox Portable Legacy 52.9.0 on PortableApps.com. firefox portable download windows xp
Since Windows XP machines often lack modern network security protocols, you can download the file on a modern PC and move it via a USB Flash Drive. 3. Critical Limitations & Risks The last official version of Firefox to support
While this download allows you to browse on older hardware, there are significant trade-offs: Firefox and Windows XP - Mozilla Support firefox portable download windows xp
This version requires at least Windows XP Service Pack 2 (SP2). Note that only the 32-bit version will run on Windows XP, even if you are using the 64-bit edition of the OS. 2. Why Use a Portable Version?
You can run the browser from any folder (like the desktop) or a USB drive without needing an administrator password.