Tighter Control Over Your Referrers

They got the spelling right this time!

Step two is to help sites protect their users. Firefox 36 Beta now supports a feature called “meta referrer.” (Yes, this time “referrer” is spelled correctly.) Now your HTML documents can include a meta tag that specifies one of many referrer policies for the document to change what Firefox sends in the Referer header, and when it is sent. If your page contains the tag:

via Tighter Control Over Your Referrers | Mozilla Security Blog.