Alternatif untuk Subtask untuk Firefox dengan lesen sumber terbuka

• Firefox
  Semua platform Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S PlayBook Web Self-Hosted Software as a Service (SaaS) Firefox Safari BSD Windows Mobile Java Apple TV Chrome Ruby HP webOS Joomla Adobe AIR MySQL Community Edition Redmine Cloudron MariaDB Ruby on Rails Jira Microsoft SQL Server PostgreSQL Install Chrome Extensions Google Chrome to Phone Evernote
• Lesen Open Source
  Mana-mana lesen Lesen percuma Lesen Open Source Lesen komersil