Say that I have a link from one.com to two.com/A.html. A.html looks like this
<FRAMESET cols="100%">
<FRAME src="B.html">
</FRAMESET>
The HTTP Referer on A.html is "one.com", but what will the HTTP referer be on B.html? Is this browser specific?
it'll be two.com/A.html, the link from the container. It's not browser specific, unless the browser is told to send a different referer via configuration
It should be two.com/a.html (i.e. the page that has the frameset on it).
Remember that these referrers are set by the browser and therefore can be faked.