Firefox Problem

Not sure what issue you're seeing. I just registered through Firefox and successfully created an account. Then, I logged out and re-logged back in with Facebook.

After I registered, I saw the invitation module, and everything worked normally for me. What happens when you say "It doesn't work". Do you get an error, blank area, click but no response, etc?

Also, can you let us know what version of Firefox you're using as well as what operating system?

Thanks,
Alex

Hmm.. I'm trying with Firefox 4.0.1 on a Mac as well and not seeing the same issue.

Can you try any of the following:
1) Logging in from a different computer
2) In Tools->Extensions (in Firefox), try disabling any add-ons you may have enabled. It's possible one of these is interfering with the login process.

Thanks,
Alex