Apps with 'Legacy addons support' feature

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

Media center supporting movies, series, YouTube, and smartTV casting via DLNA/Chromecast. Offers HD, subtitles, add-ons, with no registration needed. Notice of new episodes.

Waterfox is an open-source, privacy-focused browser based on the popular open source browser with a red panda as a mascot. It is designed to be a drop-in replacement for said browser that offers enhanced privacy features, performance improvements, and customizability while...

An open-source web browser forked from Mozilla Firefox. It focuses on security, efficiency, customization, and no data gathering.

• Ulauncher provides instant search results. It also remembers your previous choices and automatically selects the best option for you.

Basilisk is a free and Open Source XUL-based web browser, featuring the well-known Firefox-style interface and operation. It is based on the Goanna layout and rendering engine (a fork of Gecko) and builds on the Unified XUL Platform (UXP), which in turn is a fork of the Mozilla...

Classic Add-ons Archive catalog contains 93,598 versions of 19,450 Firefox add-ons created by 14,274 developers over the past 15 years using XUL/XPCOM technology before Mozilla decided to ruin the classic extensions ecosystem and go exclusively to WebExtensions.

Historically, Iceweasel was a re-branding of Mozilla Firefox by the Debian project, with minimal modifications, in order to resolve branding disputes. Debian since discontinued Iceweasel in February of 2017 after reaching an agreement with Mozilla over the use of its trademark.

Your goal is very simply to survive as long as possible by eating small germs or eat the other players and avoiding bigger players.Easy controls and fun graphic. Lets play germs (bacteria, viruses, fungi, protozoa) and eat everyone!.

Historically, Icedove was a re-branding of Thunderbird by the Debian project, with minimal modifications, in order to resolve branding disputes. Debian since discontinued Iceweasel in February of 2017 after reaching an agreement with Mozilla over the use of it's trademark.