Download OutlineKit: CSS Layout Outliner

Name: OutlineKit: CSS Layout Outliner
Author: DigiVibeTech

By: DigiVibeTech Add-on

Download OutlineKit: CSS Layout Outliner (current and past versions) for Firefox

Latest Version: 1.2.0 Updated: 7 days ago

Ready to install?

OutlineKit: CSS Layout Outliner 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 OutlineKit: CSS Layout Outliner here. You can download the archived versions or inspect their source codes.

As a free user, you can download up to 3 latest versions.

Unlock older versions with Pro

Version	Download	Size	Timestamp
1.2.0	XPI · ZIP · Source code	28.71KB	2026-11-03
1.1.1	XPI · ZIP · Source code	23.87KB	2026-10-29
1.1.0	XPI · ZIP · Source code	23.60KB	2026-10-23

2026-11-03 · 0 downloads

XPI ZIP Source code

2026-10-29 · 0 downloads

XPI ZIP Source code

2026-10-23 · 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 OutlineKit: CSS Layout Outliner ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the OutlineKit: CSS Layout Outliner ZIP file from step 1. OutlineKit: CSS Layout Outliner is now installed on your browser.