how to instal fire fopx

Hello, sorry to hear it is not working properly. Could you say a little more about what happens, for example whether the installer will not start, stops part-way through, or Firefox opens and then closes? That detail will help narrow it down. In the meantime, a few steps that often help on Windows 11: 1. Close any partially installed Firefox, restart the computer, then try the installer again. 2. Right-click the installer and choose Run as administrator. 3. If Windows blocks it as a non-verified app, check Settings, then Apps, then Advanced app settings, and make sure installing apps from anywhere is allowed, or choose to allow that installer when prompted. 4. Temporarily turn off any third-party security software just for the install, then turn it back on afterwards, in case it is stopping the installer. 5. Make sure there is enough free disk space, and remove any incomplete Firefox entry from Settings, then Apps, then Installed apps before trying again. Please let us know exactly where it stops and any error message you see, and we can go from there.