Ok. . . So it's VERY probably impossible. But I hate Opera, and I could really do with either Firefox or Mozilla on my Z (OSR1.32) I know Fx works on X on at least one of the C-series Z's. . .. But I'm on a SL-5600 so a majorly cut down Fx or Mz on QT for the 5x00 would be good. Still yet to learn C/C++/Python/Anything other than the basic VB I get taught at college. I hate England sometimes.

Ferret

I had a 5600.
opera works better than firefox on it imho.

If you must, though, look into the XQT threads..there is a way to get firefox running on xqt (I've used it, it works)

or swtich to gpe?

There's a project in progress called minimo mini mozilla which may be what you're looking for. or NetFront if you want an alternative now.