Download Developer Tools Advanced Ultra

Name: Developer Tools Advanced Ultra
Author: Jessica Williams

By: Jessica Williams Add-on

Download Developer Tools Advanced Ultra (current and past versions) for Firefox

Latest Version: 1.6.1 Updated: 6 days ago Removed

Ready to install?

Developer Tools Advanced Ultra is available for download. Be careful when installing it.

View source code

Available versions

You can find the current and older versions of Developer Tools Advanced Ultra 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
1.6.1	XPI · ZIP · Source code	15.82KB	0	2026-08-09

2026-08-09 · 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 Developer Tools Advanced Ultra ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Developer Tools Advanced Ultra ZIP file from step 1. Developer Tools Advanced Ultra is now installed on your browser.