Download UserScript Pro: Custom JS & CSS

Name: UserScript Pro: Custom JS & CSS
Author: aitchess

By: aitchess

Download UserScript Pro: Custom JS & CSS (current and past versions) for Firefox

Latest Version: 1.2.2 Updated: 2 months ago

Ready to install?

UserScript Pro: Custom JS & CSS is available to install from Firefox Add-ons Store and for download from this page.

View source code

Daily users

5.0

1 ratings

Total downloads

Available versions

You can find the current and older versions of UserScript Pro: Custom JS & CSS 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
1.2.2	XPI · ZIP · Source code	4.01MB	2026-03-20
1.2.1	XPI · ZIP · Source code	219.26KB	2026-03-07
1.1.2	XPI · ZIP · Source code	210.60KB	2026-03-05
1.1	Paid users only	184.59KB	2026-01-31

2026-03-20 · 0 downloads

XPI ZIP Source code

2026-03-07 · 0 downloads

XPI ZIP Source code

2026-03-05 · 0 downloads

XPI ZIP Source code

2026-01-31 · 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 UserScript Pro: Custom JS & CSS ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the UserScript Pro: Custom JS & CSS ZIP file from step 1. UserScript Pro: Custom JS & CSS is now installed on your browser.