SeaMonkey 2.3 Release — New Features and Fixes

The SeaMonkey project is proud to present SeaMonkey 2.3: The new major release of the all-in-one Internet suite is available for download now! Building on the same Mozilla platform as the newest Firefox release, it delivers the latest developments in web technologies such as HTML5, hardware acceleration and improved JavaScript speed.

SeaMonkey 2.3 is available in 24 languages, for Windows, Mac OS X and Linux.

Most notably, this release features for the first time:

Added support for the latest draft version of WebSockets with a prefixed API
Added support for EventSource / server-sent events
Added support for window.matchMedia
Official Support for OS X Lion

For a more complete list of major changes in SeaMonkey 2.3, see the What’s New in SeaMonkey 2.3 section of the Release Notes, which also contain a list of known issues and answers to frequently asked questions. For a more general overview of the SeaMonkey project (and screen shots!), visit

Full news article:

Downloads for all available platforms and languages:

Release notes:

System Requirements: [sic]

Justin Wood (Callek)
SeaMonkey Council member, and Release Engineer

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