Download Apier – REST API Tester & HTTP Client

Name: Apier – REST API Tester & HTTP Client
Author: Leepverse

By: Leepverse

Download Apier – REST API Tester & HTTP Client (current and past versions) for Firefox

Latest Version: 1.1.3 Updated: 21 days ago

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Apier – REST API Tester & HTTP Client is available to install from Firefox Add-ons Store and for download from this page.

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Available versions

You can find the current and older versions of Apier – REST API Tester & HTTP Client 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
1.1.3	XPI · ZIP · Source code	3.98MB	2026-05-14
1.1.2	XPI · ZIP · Source code	3.98MB	2026-05-08
1.1.0	XPI · ZIP · Source code	3.98MB	2026-04-27

2026-05-14 · 0 downloads

XPI ZIP Source code

2026-05-08 · 0 downloads

XPI ZIP Source code

2026-04-27 · 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 Apier – REST API Tester & HTTP Client ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Apier – REST API Tester & HTTP Client ZIP file from step 1. Apier – REST API Tester & HTTP Client is now installed on your browser.