Why can't I install FF21?
The installation of FF21 may fail because of the lack of device storage, poor network connection, or the compatibility of your Android device. Therefore, please check the minimum requirements first to make sure FF21 is compatible with your phone.
How to download FF21 old versions?
APKPure provides the latest version and all the older versions of FF21. You can download any version you want from here: All Versions of FF21
What's the file size of FF21?
FF21 takes up around 2.0 MB of storage. It's recommended to download APKPure App to install FF21 successfully on your mobile device with faster speed.