Issue 5007: Headers from POST request body are not displayed anymore

Steps to reproduce

  1. Open Firebug
  2. Enable and switch to the Net panel
  3. Click the Send button above
    The Net panel will display a POST request to issue5007.html
  4. Expand that request by clicking on it
  5. Inside the Headers tab have a look for the Content-Type and Content-Length header

Expected result