Download Gmail Headers Beautifier

Name: Gmail Headers Beautifier
Author: Top Deliverability

By: Top Deliverability Add-on

Download Gmail Headers Beautifier (current and past versions) for Firefox

Latest Version: 1.0.6 Updated: 6 months ago

Ready to install?

Gmail Headers Beautifier is available to install from Firefox Add-ons Store and for download from this page.

View source code

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Total downloads

Available versions

You can find the current and older versions of Gmail Headers Beautifier 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
1.0.6	XPI · ZIP · Source code	211.89KB	0	2026-03-10
1.0.3	XPI · ZIP · Source code	142.58KB	0	2026-01-02
1.0.2	XPI · ZIP · Source code	101.09KB	1	2025-06-12

2026-03-10 · 0 downloads

XPI ZIP Source code

2026-01-02 · 0 downloads

XPI ZIP Source code

2025-06-12 · 1 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 Gmail Headers Beautifier ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Gmail Headers Beautifier ZIP file from step 1. Gmail Headers Beautifier is now installed on your browser.