Download CAT4Web

Name: CAT4Web
Author: Nikolay

By: Nikolay Add-on

Download CAT4Web (current and past versions) for Firefox

Latest Version: 0.4.0 Updated: 21 days ago

Ready to install?

CAT4Web is available to install from Firefox Add-ons Store and for download from this page.

View source code

Daily users

5.0

2 ratings

Total downloads

Available versions

You can find the current and older versions of CAT4Web 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
0.4.0	XPI · ZIP · Source code	65.83KB	2026-08-01
0.1.3resigned1	XPI · ZIP · Source code	21.64KB	2024-04-26
0.1.2	XPI · ZIP · Source code	18.09KB	2018-09-27

2026-08-01 · 0 downloads

XPI ZIP Source code

2024-04-26 · 0 downloads

XPI ZIP Source code

2018-09-27 · 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 CAT4Web ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the CAT4Web ZIP file from step 1. CAT4Web is now installed on your browser.