Catalog of classic Firefox add-ons created before WebExtensions apocalypse

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

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

Pale Moon Release Branch Clone

Mirror of mailredirect extension

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

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

XUL fork of uBlock Origin for Advanced users

A continuation of legacy XUL version of DownThemAll! ✔️preserves web.archive.org timestamps, ✔️advanced filters for remote directory tree mirroring, ✔️UI is tweaked for better UX

GitHubby is a browser extension that improves the experience of GitHub by setting limits by GitHub and making improvements. This is my first browser extension, so please correct any issues and give an ELI5 or ELI13 description, I have never done this before.

Official DownThemAll! repository. Pull requests welcome.

Modifies web pages to use a dark color scheme or based on the user's preferences

This Thunderbird addon shows the calendar color on Lightning reminders.

Cite4wiki XUL extension for generating an English Wikipedia citation from any Web page

React implementation of Thunderbird's XUL dialog-box.