Header Override Firefox

Download Header Override

By: headeroverride.com Add-on
Download Header Override (current and past versions) for Firefox
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Modify request and response headers. No ads, no malware.
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Latest Version: 1.0.10 Updated: 2 days ago

Ready to install?

Header Override 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 Header Override 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
1.0.10XPI · ZIP · Source code56.55KB02026-08-15
1.0.9XPI · ZIP · Source code54.25KB02026-08-07
1.0.8XPI · ZIP · Source code52.13KB02026-08-03
1.0.7Paid users only51.59KB02026-07-29
1.0.5Paid users only51.18KB02026-07-25
1.0.4Paid users only48.95KB02026-07-22
1.0.1Paid users only36.04KB02026-07-17
1.0.10 56.55KB
2026-08-15 · 0 downloads
XPI ZIP Source code
1.0.9 54.25KB
2026-08-07 · 0 downloads
XPI ZIP Source code
1.0.8 52.13KB
2026-08-03 · 0 downloads
XPI ZIP Source code
1.0.7 51.59KB
2026-07-29 · 0 downloads
Paid users only
1.0.5 51.18KB
2026-07-25 · 0 downloads
Paid users only
1.0.4 48.95KB
2026-07-22 · 0 downloads
Paid users only
1.0.1 36.04KB
2026-07-17 · 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 Header Override ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the Header Override ZIP file from step 1. Header Override is now installed on your browser.

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