Alternativas ao Greasefire para Vivaldi Browser com licença de código aberto

• Vivaldi Browser
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Apple Watch iPad Android Tablet Kindle Fire Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Vivaldi Browser SeaMonkey BSD PortableApps.com Microsoft Office Outlook Electron / Atom Shell Chrome Microsoft Edge Thunderbird Yandex.Browser Maxthon Sunbird Neovim
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial