Download HTTP Header Spy

Name: HTTP Header Spy
Author: Michiel Roos

By: Michiel Roos Add-on

Download HTTP Header Spy (current and past versions) for Firefox

Latest Version: 2.0.49 Updated: 7 years ago

Ready to install?

HTTP Header Spy is available to install from Firefox Add-ons Store and for download from this page.

View source code

220

Daily users

4.8

5 ratings

Total downloads

Available versions

You can find the current and older versions of HTTP Header Spy 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

Version	Download	Size	Download count	Timestamp
2.0.49	XPI · ZIP · Source code	594.43KB	3	2020-01-09

2020-01-09 · 3 downloads

XPI ZIP Source code

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