Download API Lab — Offline API Tester

Name: API Lab — Offline API Tester
Author: Ankit Pundir

By: Ankit Pundir

Download API Lab — Offline API Tester (current and past versions) for Firefox

Latest Version: 1.0.2 Updated: 3 days ago

Ready to install?

API Lab — Offline API Tester is available to install from Firefox Add-ons Store and for download from this page.

View source code

Available versions

You can find the current and older versions of API Lab — Offline API 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	Timestamp
1.0.2	XPI · ZIP · Source code	170.75KB	2026-07-03
1.0.1	XPI · ZIP · Source code	169.66KB	2026-06-11
1.0.0	XPI · ZIP · Source code	165.40KB	2026-06-07

2026-07-03 · 0 downloads

XPI ZIP Source code

2026-06-11 · 0 downloads

XPI ZIP Source code

2026-06-07 · 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 API Lab — Offline API Tester ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the API Lab — Offline API Tester ZIP file from step 1. API Lab — Offline API Tester is now installed on your browser.