Extensions / Add-Ons for Mozilla Firefox and Mozilla Thunderbird

Thunderbird-Fluent is a fork of FluentBird (a userChrome.css theme for Mozilla Thunderbird) that implemenets modern and transparency materials.

🔓 Decrypt passwords stored by Firefox, Thunderbird, Iceweasel, Icedove using libnss3.so

thunderbird download email client windows — Mozilla Thunderbird for Windows 11 & 10. Direct download, install steps and setup guide.

Service autodiscovery server

Sieve Mail filtering and tagging for Gitub Notifications

The Firefox "Alpenglow" Theme for Thunderbird.

QuoteCollapse Thunderbird extension

Script to backup your thunderbird profile

AboutConfig Thunderbird extension

This repository contains a Thunderbird WebExtension (Thundy AV) that performs opt‑in, real‑time scans of incoming emails using local checks and optional external analysis services.

(WIP) Synchronization of Thunderbird's contacts + calendars between Linux and Android terminal

Install Thunderbird from a Tarball on your Linux machine, easily!

Antispam UI for Mozilla ThunderBird

Flathub build for Thunderbird flatpak package

An extension for Thunderbird 3.0+ that allows you to view threads as "real" conversations, including your own emails. This extension also adds a bunch of useful UI features in the conversation view. Get a pre-built binary at the link below.

A lightweight, efficient, and permission-free extension for Mozilla Thunderbird that minimizes the main Thunderbird window immediately after startup.

A Thunderbird extension that integrates Seafile as a FileLink provider. Upload large email attachments automatically to your Seafile server and replace them with a download link easily!

[PL] Naprawia zepsuty import kontaktów z Mozilli Thunderbird do Google Kontaktów.

An email security add-on for Mozilla Thunderbird