Download Universal Sidebar

Name: Universal Sidebar
Author: mrweb

By: mrweb

Download Universal Sidebar (current and past versions) for Firefox

Latest Version: 2.1.2 Updated: 12 days ago

Ready to install?

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

View source code

234

Daily users

5.0

15 ratings

Total downloads

Available versions

You can find the current and older versions of Universal Sidebar 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
2.1.2	XPI · ZIP · Source code	35.41KB	2026-06-27
2.1.1	XPI · ZIP · Source code	36.56KB	2026-06-25
2.0.0	XPI · ZIP · Source code	31.64KB	2026-06-23
1.4.1	Paid users only	25.67KB	2024-10-27
1.4	Paid users only	25.63KB	2024-06-30
1.1	Paid users only	22.92KB	2024-06-26
1.0	Paid users only	22.93KB	2024-06-24

2026-06-27 · 0 downloads

XPI ZIP Source code

2026-06-25 · 0 downloads

XPI ZIP Source code

2026-06-23 · 0 downloads

XPI ZIP Source code

2024-10-27 · 0 downloads

Paid users only

2024-06-30 · 0 downloads

Paid users only

2024-06-26 · 0 downloads

Paid users only

2024-06-24 · 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 Sidebar ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Universal Sidebar ZIP file from step 1. Universal Sidebar is now installed on your browser.