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 is available in 26 languages, for Windows, Mac OS X and Linux.

Most notably, this release features for the first time:

  • The Content Security Policy (CSP) 1.0 parser has been enabled.
  • The Mixed Content Blocker has been enabled, blocking insecure active content loads on HTTPS pages.
  • New mail alert information can be customized now (Preferences/Mail & Newsgroups/Notifications).
  • A confirmation prompt has been introduced to protect against accidental permanent data loss when force-deleting messages using Shift+Del.
  • MailNews Save As Template supports multiple selections now.
  • The size on disk is now shown for newsgroup folders.
  • Added support for scrollbar style in Mac OS X 10.7 and newer.
  • Enabled mixed content blocking to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages.
  • Improved about:memory's functional UI.
  • Enabled DXVA2 on Windows Vista+ to accelerate H.264 video decoding.
  • Simplified interface for notifications of plugin installation.
  • Enabled users to switch the search provider across the entire browser.
  • CSP policies using the standard syntax and semantics will now be enforced.
  • Implemented the HTML5 form control.
  • Added unprefixed requestAnimationFrame.
  • Dropped blink effect from CSS rule text-decoration:blink and completely removed element.
  • Fixed several stability issues.

What's New:

  • Added download link for beta version 2.31 Beta 1

SeaMonkey-specific changes

  • Adding certificate exceptions for mail servers failed (bug 1059476).
  • Install add-on doorhanger notifications were not displaying (bug 1051006).

Mozilla platform changes:

  • OMTC has been enabled by default on Windows.
  • OpenH264 support (sandboxed) has been added.
  • A new CSP backend was implemented.
  • Support for connecting to HTTP proxies over HTTPS was implemented.
  • Improved reliability of the session restoration.
  • WebCrypto support has been enhanced: Added RSA-OAEP, PBKDF2 and AES-KW support, implemented wrapKey and unwrapKey, enabled import/export of JWK-formatted keys.
  • Also see Firefox 33 for Developers.
  • Fixed several stability issues.