Comment 12 for bug 227852

Ok, I am not sure I get this. What the WebDAV code does is the following:

We parse the URI and every part of it and then prefill the authentication information with that. So a URI of dav://<email address hidden>/path should result in username being "user" and the host "server.tld" ...
If your username has an @ sign in it (i.e. it is an E-Mail address) you need to URL escape the @ sign by using %40 otherwise you will end up with an url parsing error or something.
Encoding the password is not supported right now. So you should always get a password dialog box, prefilled with the correct username if specified.