If you are particular about using Free Software, then you might appreciate Gnash, a free implementation of Flash player. Gnash is compatible with Flash version 7, and implements all ActionScript classes. Though not all of the classes are implemented, Gnash is the best of the free (as in freedom) flash player available.
Gnash flash player will be available as a standalone player or as a Mozilla Firefox plugin. Although haven’t been released, Gnash sources can be obtained through CVS access from Savannah project.
The Gnash project website : http://www.gnu.org/software/gnash/
i haven’t used Gnash flash player before, sounds good, thanks for providing the Gnash project website!