Firefox has an annoying bug you may have come across while working with Flash applications and websites: When you make a request for a file from a swf, Firefox doesn’t send a referer. I’ve set up a test page to show the problem.

If you visit this page in Firefox and click the “push me” button, you will see simply “Ref is:” but no other text. If you visit in with any other browser, you’ll see:
“Ref is: [http://dev.deconcept.com/referer_tester/]”.

The problem is that Firefox doesn’t properly append the referer header to requests made from swfs embedded on the page. Every other browser I’ve tested sends a referer.

How you can help:

Visit the bug page for this issue and “vote” for the bug. DO NOT ADD A COMMENT SAYING SOMETHING LIKE “Yes please fix this bug!”. This will only annoy the developers. Simply “voting” for the bug is enough. You vote for the bug by clicking the “vote” link on the top right side of the page, and putting a check in the box next to the bug and clicking the “Change my votes” on the subsequent page.