Firefox wont access unusual tcp ports

Keywords: firefox
Versions: Firefox 1.5.0

When trying to access a URL with a nonstandard port, Firefox says:

This address is restricted

This address uses a network port which is normally used for purposes other than Web browsing. Firefox has canceled the request for your protection.

The correct workaround is adding a new string value to "about:config" called "". Then enter a comma-separated list of port numbers to allow.