Way to make Firefox appear to Website as IE6 ?

[Neil Joseph Schelly]

Is it enough to tell the server you're using IE?  I use User Agent Switcher 
(Firefox extension), which lets you easily change the User Agent on the fly 
between several pre-determined ones.  I find that most sites that disallow 
unknown browsers work fine when I tell them it's IE or Firefox on Windows, 
instead of Iceweasel on Linux.

Or do you mean that you tried working with the application with Firefox and 
Firefox couldn't run the IE-specific code?  If that's the case, I don't know 
what you could do - sorry.
-N