Download Custom Css Insert Dev

Name: Custom Css Insert Dev
Author: Helen Clark

By: Helen Clark

Download Custom Css Insert Dev (current and past versions) for Firefox

Latest Version: 1.0 Updated: 3 months ago Removed

Ready to install?

Custom Css Insert Dev is available for download. Be careful when installing it.

View source code

Available versions

You can find the current and older versions of Custom Css Insert Dev 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
1.0	XPI · ZIP · Source code	52.18KB	0	2026-02-28

2026-02-28 · 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 Custom Css Insert Dev ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Custom Css Insert Dev ZIP file from step 1. Custom Css Insert Dev is now installed on your browser.