Alternativa nPOPuku za Firefox sa besplatnom licencom

• Firefox
  Sve platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Apple Watch Android Wear iPad Android Tablet Windows S Web Self-Hosted Firefox Opera Chromium BSD Xfce Haiku PortableApps.com Chrome Ruby Gmail Adobe AIR GNOME Cloudron OpenPGP S/MIME
• Besplatna licenca
  Bilo koja licenca Besplatna licenca Licenca otvorenog koda Komercijalna licenca