Open the App Store on your device and go to the Firefox for iOS page. It requires the following models (or greater) to operate properly: iPhone 5, iPad 4th generation, and iPod touch 6th generation. Firefox is only available on devices with iOS 10.3 and above. Available now on Windows, Mac, Linux, Android and iOS. Get Firefox, a free web browser backed by Mozilla, a non-profit dedicated to internet health and privacy.