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Apps with 'Legacy addons support' feature

  1. Firefox is a cross-platform web browser developed by the Mozilla Foundation. Firefox is a popular product, used in over 50 languages and available for Windows, macOS, Linux, Android and iOS.
  2. Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.


  3. Media center allowing to watch movies, series, YouTube channels instantly. You can watch in HD, with subtitles, and easily cast any file to TV through DLNA, Chromecast, AppleTV! Stremio also gives you notifications for new episodes / movies.
  4. Waterfox is a high performance browser based on the Mozilla platform. Made specifically for 64-Bit systems, Waterfox has one thing in mind: speed.
  5. Pale Moon is an Open Source, Goanna-based web browser available for Microsoft Windows and Linux (with other operating systems in development), focusing on efficiency and customization. Make sure to get the most out of your browser!.
  6. * Ulauncher provides instant search results. It also remembers your previous choices and automatically selects the best option for you.
  7. Basilisk is a free and Open Source XUL-based web browser, featuring the well-known Firefox-style interface and operation.

    Discontinued

    From their website: “Important: Development on the Basilisk browser has been suspended as of December 2021. Any genuinely sincere, legitimate and reasonable developer may want to contact me if they are interested in taking over this project.”
    https://forum.palemoon.org/viewtopic.php?f=61&t=27722

  8. Interlink Mail & News is a free e-mail client based on open source community code built on the Unified XUL Platform. It is available for Microsoft Windows and Linux (with other operating systems in development).
  9. 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.
  10. 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.
    • FreeProprietary
    • iPhone
    • iPad
    • Amazon Appstore
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    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!.
  11. 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.
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    • FreeProprietary
    • Mac
    • Windows
    • Linux
    • Waterfox
    • Pale Moon
    • Firefox
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    Buttons for managing site cookie permissions, switching global cookie permissions on and off, browsing cookies, and removing cookies. The same functions are included for local and session storage.

    Discontinued

    The extension doesn't work on Firefox 57: Mozilla does not provide all the necessary APIs that would allow this add-on to be migrated to WebExtensions. It still works on XUL-based Firefox forks like Waterfox and Pale Moon