Firefox and Air Mouse

I have been trying to get Firefox to work and Fore Core support are telling me that it doesn’t work with the Apple Remote (iPhone app) but only with Air Mouse. Firstly, is this true ? Secondly, when I install Air Mouse I get some sort of error when I launch it, but I can’t see the error message because it is obscured by another dialog box asking me to fill in my email address - which I can’t because the remote is not working. The only way I can get rid of this dialog is via the menu button on my Apple remote.