Open Headers Firefox

Download Open Headers

Download Open Headers (current and past versions) for Firefox
Latest Version: 4.1.4 Updated: 2 months ago

Ready to install?

Open Headers is available to install from Firefox Add-ons Store and for download from this page.
View source code
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Available versions

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

As a free user, you can download up to 3 latest versions.
Upgrade to download older versions
VersionDownloadSizeDownload countTimestamp
4.1.4XPI · ZIP · Source code764.81KB02026-04-04
3.2.0XPI · ZIP · Source code579.14KB02026-03-18
2.1.0XPI · ZIP · Source code428.94KB02025-06-03
2.0.0Paid users only427.89KB02025-05-28
1.5.0Paid users only52.04KB02025-05-18
1.4.0Paid users only50.28KB02025-05-16
1.3.0Paid users only48.25KB02025-05-01
1.1.0Paid users only58.78KB02025-04-24
4.1.4 764.81KB
2026-04-04 · 0 downloads
XPI ZIP Source code
3.2.0 579.14KB
2026-03-18 · 0 downloads
XPI ZIP Source code
2.1.0 428.94KB
2025-06-03 · 0 downloads
XPI ZIP Source code
2.0.0 427.89KB
2025-05-28 · 0 downloads
Paid users only
1.5.0 52.04KB
2025-05-18 · 0 downloads
Paid users only
1.4.0 50.28KB
2025-05-16 · 0 downloads
Paid users only
1.3.0 48.25KB
2025-05-01 · 0 downloads
Paid users only
1.1.0 58.78KB
2025-04-24 · 0 downloads
Paid users only

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.
  • Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  • Download the Open Headers ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the Open Headers ZIP file from step 1. Open Headers is now installed on your browser.

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