No it is not possible for java and symbian phone

The mobile Firefox is only for Android 2.3+ and ARMv7 and Intel hardware.

There is a Firefox experiment version in trial for iOS however it is a shell due to Apple's restrictions.

There is no versions for any other mobile OS whether old, current or in development.

Tx dear James,your anser is very helpful for me..because my device is symbian

                     Thanks for youranser.

Tx dear Shobz