SeaMonkey

SeaMonkey 2.48

Web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing made simple.

Windows/macOS/Linux
Freeware
38.1 MB
7,844
4.1 18 votes

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:

SeaMonkey-specific changes

  • The bug which prevented you to set the default search engine in SeaMonkey 2.46 has been fixed. If you see any problems with this please report it in bug 1265881.
  • The Errror Console is now a part of SeaMonkey. It was replaced by the Developer Tools Web and Browser Console in Firefox which both are also available in SeaMonkey. If you use css to style the console please note that it is now located in "chrome://communicator/content/console/console.xul/".
  • The Help Viewer is now a part of SeaMonkey and has been deleted from Mozilla Gecko.
  • SeaMonkey now uses the HTTP cache v2. For technical details please check bug 1241622.
  • Troubleshooting Information in "about:support" is displayed in a better readable layout.

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.

Apps similar to SeaMonkey 8

  • 4.4
    867 votes
    Improve your browsing experience with Mozilla's open-source and highly acclaimed Firefox.
    • Freeware
    • Windows/macOS/Linux
  • 4.2
    219 votes
    Chrome combines a minimal design with sophisticated technology to make the web faster, safer, and easier.
    • Freeware
    • Windows
  • 3.1
    43 votes
    Enjoy safe, fast and easy email, Mozilla-style. The Thunderbird email client includes intelligent spam filters, powerful search and customizable views.
    • Freeware
    • Windows/macOS/Linux
  • More