Download Check It Off

Name: Check It Off
Author: Dickens Steven

By: Dickens Steven

Download Check It Off (current and past versions) for Firefox

Latest Version: 7.10.3 Updated: a month ago Removed

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Check It Off is available for download. Be careful when installing it.

View source code

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Available versions

You can find the current and older versions of Check It Off 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	Download count	Timestamp
7.10.3	XPI · ZIP · Source code	663.45KB	0	2026-05-11
1.2.1	XPI · ZIP · Source code	13.85KB	0	2026-04-03

2026-05-11 · 0 downloads

XPI ZIP Source code

2026-04-03 · 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 Check It Off ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Check It Off ZIP file from step 1. Check It Off is now installed on your browser.