Download Developer Site Tester

Name: Developer Site Tester
Author: Coral Calhoun

By: Coral Calhoun

Download Developer Site Tester (current and past versions) for Firefox

Latest Version: 0.1.0.1resigned1 Updated: 6 months ago

Ready to install?

Developer Site Tester is available to install from Firefox Add-ons Store and for download from this page.

View source code

Daily users

—

No ratings yet

Total downloads

Available versions

You can find the current and older versions of Developer Site Tester 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
0.1.0.1resigned1	XPI · ZIP · Source code	94.21KB	0	2025-12-19

2025-12-19 · 0 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 Developer Site Tester ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Developer Site Tester ZIP file from step 1. Developer Site Tester is now installed on your browser.