Capturing HTTP headers on Mozilla Firefox


Capturing HTTP headers on Mozilla Firefox

At times, Zscaler Support may ask you to provide HTTP headers when troubleshooting certain issues. The HTTP headers identify the specific URL the browser accessed when you opened a web page. You can use Mozilla's Inspector tool to capture HTTP headers in Mozilla Firefox version 66.0.2. If you are running a different browser version, the steps might be different. For more information, see the Mozilla documentation.

Capturing HTTP Headers

  1. In Firefox, go to the desired website. In this example, it's www.zscaler.com.
  2. Click the Menu button and then click Web Developer. The Web Developer menu appears.
    See image.
  3. In this menu, select Inspector. The Inspector window appears.
    See image.
  4. In this window, select the Network tab. 
    See image.
  5. In the Network tab, right-click the element you wish to inspect and select Save All As HAR. In this view, the HTTP headers are also visible in the Headers box on the right-hand side.
    See image.
  6. Click OK in the dialog box that appears to download the file.
  7. Send the saved file to the Zscaler Support team.

Screenshot of Mozilla Firefox window with Web Developer option highlighted

Screenshot of Mozilla Firefox with Inspector highlighted

Screenshot of the Inspector window with Network highlighted

Screenshot of the Save All As HAR option