userid and password for update

Hello in Windows 7 when I try to update Libreoffice ask my userid and password for the site update.libreoffice.org.
Why? I haven’t a userid and password.
What ca I do?
Thanks

This is strange. You should use http://www.libreoffice.org/download instead anyway, this is where update.libreoffice.org would redirect you.

What browser do you use?

I use Firefox.