Header Editor Firefox

Download Header Editor

By: 泷涯
Download Header Editor (current and past versions) for Firefox
Latest Version: 5.2.12 Updated: a month ago

Ready to install?

Header Editor is available to install from Firefox Add-ons Store and for download from this page.
View source code
11,693
Daily users
4.7
183 ratings
3
Total downloads

Available versions

You can find the current and older versions of Header Editor 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
5.2.12XPI · ZIP · Source code762.46KB02026-05-26
5.2.10XPI · ZIP · Source code762.33KB12026-03-30
5.2.9XPI · ZIP · Source code766.62KB12026-03-04
5.2.8Paid users only766.52KB02025-11-17
5.2.7Paid users only766.15KB02025-10-08
5.2.5Paid users only761.04KB02025-09-22
5.2.4Paid users only760.60KB02025-09-12
5.2.3Paid users only755.68KB02025-09-02
4.1.1Paid users only455.62KB12019-12-20
5.2.12 762.46KB
2026-05-26 · 0 downloads
XPI ZIP Source code
5.2.10 762.33KB
2026-03-30 · 1 downloads
XPI ZIP Source code
5.2.9 766.62KB
2026-03-04 · 1 downloads
XPI ZIP Source code
5.2.8 766.52KB
2025-11-17 · 0 downloads
Paid users only
5.2.7 766.15KB
2025-10-08 · 0 downloads
Paid users only
5.2.5 761.04KB
2025-09-22 · 0 downloads
Paid users only
5.2.4 760.60KB
2025-09-12 · 0 downloads
Paid users only
5.2.3 755.68KB
2025-09-02 · 0 downloads
Paid users only
4.1.1 455.62KB
2019-12-20 · 1 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 Editor ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the Header Editor ZIP file from step 1. Header Editor is now installed on your browser.

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