The pages says: "You can find the password for the next level on this page, but rightclicking has been blocked!"
However, in the version of Iceweasel that I am using it looks like that is not true:
But to make this fun, I'll take the challenge. I remember that Firefox has a keyboard shortcut to open the Inspector (Ctrl + Shift + I). After that was open, the password was simply within the div block with the id of content: