Download Universal Inbox

Name: Universal Inbox
Author: David Rousselie

By: David Rousselie

Download Universal Inbox (current and past versions) for Firefox

Latest Version: 0.1.5 Updated: 2 months ago

Ready to install?

Universal Inbox is available to install from Firefox Add-ons Store and for download from this page.

View source code

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Available versions

You can find the current and older versions of Universal Inbox 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
0.1.5	XPI · ZIP · Source code	25.05KB	2026-05-22
0.1.4	XPI · ZIP · Source code	25.02KB	2026-04-13
0.1.3	XPI · ZIP · Source code	23.90KB	2025-09-10
0.1.2	Paid users only	23.81KB	2025-09-09
0.1.0	Paid users only	24.01KB	2025-09-05

2026-05-22 · 0 downloads

XPI ZIP Source code

2026-04-13 · 0 downloads

XPI ZIP Source code

2025-09-10 · 0 downloads

XPI ZIP Source code

2025-09-09 · 0 downloads

Paid users only

2025-09-05 · 0 downloads

Paid users only

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