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Ambassador is a fork of the ChatZilla IRC client built upon the Unified XUL Platform. It features a simple, straighforward interface with a number of options for customization and extensibility. It is available as an add-on compatible with other applications built upon UXP, and as a stand-alone package that can be installed and run independently of a browser.

Platform Support

The add-on is compatible with the following UXP-based applications:

The stand-alone version can be downloaded in the following formats:

  • Windows 64-bit installer
  • Windows 64-bit ZIP archive
  • Windows 32-bit installer
  • Windows 32-bit ZIP archive
  • Mac OS X 64-bit DMG file
  • Linux 64-bit tarball


Ambassador includes most of the features found in ChatZilla, along with some unique features of its own.

  • IRCv3 support
  • Password management
  • A window for viewing secure connection details
  • An editor for the built-in networks list
  • CTCP request notifications
  • Several new commands
  • Emoji support
  • Removed CEIP

Please see the release notes for further details on these new features.