> On google search, you have the variable window.location.search = "?gfe_rd=cr&ei=XXXGyZiVNHoFcuF8Qe7wYHACw&gws_rd=ssl"
> That string is appended to the url of the iframe: src="https://foobar.withgoogle.com/"+window.location.search
Check this sub-thread of the other thread https://news.ycombinator.com/item?id=8590155. Someone goes into more depth about it.