Whenever I have to go to the know or to a teamsite our our sharepoint server, I get this dialog box which prompts me to enter a username and password in firefox. I don't get this in IE. The fix in firefox is this:
1. Open Firefox
2. Navigate to the url about:config
3. Locate the following preference names and put as the value the comma separated values of the address roots.
Your value should look something like this: localhost,noblis.org