ModHeader

Add and modify the HTTP request headers and response headers. Use ModHeader to: - Add / modify request and response headers - Add / modify cookies - Multi-profile support - Filtering based on URL, tab, or window - Export and share profiles

ModHeader is available for download. It had 19,864 active users before it was removed from Firefox Browser Add-ons on 2024-05-01, and it has been downloaded from Firefox-Stats 69 times. The latest version is 4.4.1, and it was published a year ago. Be careful when installing it.

View source code
Total download count: 69 (Only count downloads from Firefox-Stats)

All available versions

You can find the current and older versions of ModHeader here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions
 24 versions available for download.

Install XPI file

  1. Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  1. Download the ModHeader ZIP file
  2. In Firefox browser, go to about:addons to open Add-ons Manager
  3. Click on , then select Install Add-on From File
  4. Select the ModHeader ZIP file from step 1. ModHeader is now installed on your browser.