xul

Komodo Edit is a fast and free multi-language code editor. Written in JS, Python, C++ and based on the Mozilla platform.

Catalog of classic Firefox add-ons created before WebExtensions apocalypse

The greatest user script engine on the Internet (a fork of Greasemonkey).

Lightweight C++ GUI Library 轻量级C++图形界面库

[WIP] A curated list and XPI files of Mozilla Firefox browser extensions, addons, themes from addons.mozilla.org, before XUL-based purge blackout

This addon adds awesome statistics to your beloved Thunderbird!

A legacy Mozilla Firefox add-on to import and export search engines from XML files in the OpenSearch format

This is a Thunderbird addon that adds some magic to the folder list columns. Check the addon website for more info...

Thunderbird add-on CompactHeader

A Firefox Extension to add support for the Universal Edit Button

NoSquint is a Firefox add-on that allows you to adjust the text-only and full-page zoom levels as well as color settings both globally (for all sites) and per site.

Easier management of the user interface language in Mozilla applications

Google summer of code project - Dialog development area for CONVERT XUL TO REACT.

Mirror of mailredirect extension

live XUL editor : with seamonkey open this --->

XUL fork of uBlock Origin for Advanced users

This is a Thunderbird addon that lets you customize the IMAP quota statusbar panel.

A PC Music Disk, 9 electro & hip/hop tracks with a 3D interface.

Build XUL style applications with HTML (requires Electron or shadow dom compatible browser)

UXP - Unified XUL Platform