When I am on the local machine I want to access the VMWare Infrastructure Web access without typing username and password.
The old gui console from the 1.x series could just connect locally without that.
Another solution would be if Firefox somehow stored the login, but somethng prevents it. The Firefox password manager does not work.
Edit: The accepted answer shows how to do it on windows host, see below. If you need to find the file on a linux host maybe this helps you:
This is the directory where the file WebAccess.properties lives on a Ubuntu 8.04 LTS host.