Please see over here for phones : https://support.mozilla.org/en-US/

Please let us know if this solved your issue or if need further assistance.

purono said

is it possible for Firefox to be put on my phone (Nokia 1020 - windows phone)? And how can it be done, thanks

Sorry, Mozilla doesn't support Windows mobile phones. Android and iOS devices; that's it.

There is no version of Firefox for any Windows mobile devices and not likely to ever be.

Microsoft recently admitted development has been halted and is only getting security and bug fixes in meantime. Also due to the ever increasingly lower number of users over time it does not make sense to use up resources to make a complex application for so few users of a essentially discontinued OS compared to Android and iOS.

Also another main reason for no mobile browser development for any Windows mobile OS's in the last years was following the Windows Phone 7 announcement and Microsoft's decision not to release a native development kit, as with Android and other systems, development for Windows Mobile was put on hold as was mentioned here

When Mozilla originally started on mobile browser development it was with Minimo and here for the then Windows mobile OS's until development was stopped officially back in November 2007. They instead moved to Android since.