Version History of Thunderbird 9.0

  • Thunderbird is based on the new Mozilla Gecko 9 engine
  • New opt-in system for users to send performance and usability data back to Mozilla to improve future versions of Thunderbird
  • Additional support for Personas in the compose and address book windows
  • Better keyboard handling for attachments
  • Windows users can hide the menu bar (and show it with the "alt" key)
  • Several user interface fixes and improvements
  • Fixed several security issues