Download Mastery Lookup

Name: Mastery Lookup
Author: Michael

By: Michael

Download Mastery Lookup (current and past versions) for Firefox

Latest Version: 1.6.0 Updated: 2 years ago

Ready to install?

Mastery Lookup 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 Mastery Lookup 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	Timestamp
1.6.0	XPI · ZIP · Source code	53.76KB	2024-02-19
1.5.0	XPI · ZIP · Source code	10.02KB	2022-11-14
1.4.1	XPI · ZIP · Source code	9.78KB	2022-11-11

2024-02-19 · 0 downloads

XPI ZIP Source code

2022-11-14 · 0 downloads

XPI ZIP Source code

2022-11-11 · 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 Mastery Lookup ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Mastery Lookup ZIP file from step 1. Mastery Lookup is now installed on your browser.