The SeaMonkey^® Project

The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite (see below). Such a software suite was previously made popular by Netscape and Mozilla, and the SeaMonkey project continues to develop and deliver high-quality updates to this concept. Containing an Internet browser, email & newsgroup client with an included web feed reader, HTML editor, IRC chat and web development tools, SeaMonkey is sure to appeal to advanced users, web developers and corporate users.

Under the hood, SeaMonkey uses much of the same Mozilla source code which powers such successful siblings as Firefox and Thunderbird. Legal backing is provided by the Mozilla Foundation.

Project News

August 13, 2017

Download problems with NoScript active

If you are using NoScript you might encounter a certificate error when trying to download SeaMonkey from this site. NoScript tries to force an https connection for an http only site. It is not a NoScript problem but how the Mozilla server, from which downloads are delivered, is configured.

In this case please add download.cdn.mozilla.net to the NoScript "Never force secure (HTTPS) connections" options or turn off NoScript for this download only. The settings are located in the NoScript options under "Advanced->HTTPS".

July 31, 2017

SeaMonkey 2.48 released

The SeaMonkey project is proud to present SeaMonkey 2.48: The new major release of the all-in-one Internet suite is available for download now! Building on the same Mozilla platform as Firefox 51, it delivers those same developments in web technologies such as HTML5, hardware acceleration and improved JavaScript speed.

SeaMonkey 2.48 is available in 19 languages, for Windows, Mac OS X and Linux.

Automatic upgrades from previous versions are, for most configurations, disabled for this release. If you need to upgrade from an earlier version, please download the full installer from the downloads section and install SeaMonkey 2.48 manually over the previous version.

For a more complete list of major changes in SeaMonkey 2.48, see the What's New in SeaMonkey 2.48 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 www.seamonkey-project.org.

July 12, 2017

Fight for Net Neutrality

The SeaMonkey project supports the battle for the net campaign. If you live in the US please do it too. But companies in other countries are also lobbying for the same goal so even if you are not a US citizen keep an eye open.

April 15, 2017

SeaMonkey 2.48 Beta 1 released

The SeaMonkey project is proud to present SeaMonkey 2.48 Beta 1: The new Beta release of the all-in-one Internet suite is available for download now! Building on the same Mozilla platform as Firefox 51, it delivers those same developments in web technologies such as HTML5, hardware acceleration and improved JavaScript speed.

SeaMonkey 2.48 Beta 1 is available in 18 languages, for Windows, Mac OS X and Linux.

This is a Beta Release. We encourage testers to get involved in discussing and reporting problems as well as further improving the product.

For a more complete list of major changes in SeaMonkey 2.48 Beta 1, see the What's New in SeaMonkey 2.48 Beta 1 section of the Release Notes, which also contains a list of known issues and answers to frequently asked questions. For a more general overview of the SeaMonkey project (and screen shots!), visit www.seamonkey-project.org.

December 22, 2016

SeaMonkey 2.46 released

The SeaMonkey project is proud to present SeaMonkey 2.46: The new major release of the all-in-one Internet suite is available for download now! Building on the same Mozilla platform as Firefox 49, it delivers those same developments in web technologies such as HTML5, hardware acceleration and improved JavaScript speed.

SeaMonkey 2.46 is available in 26 languages, for Windows, Mac OS X and Linux.

For a more complete list of major changes in SeaMonkey 2.46, see the What's New in SeaMonkey 2.46 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 www.seamonkey-project.org.

March 14, 2016

SeaMonkey 2.40 released

The SeaMonkey project is proud to present SeaMonkey 2.40: 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.

The Release Notes feature more in-depth lists of the improvements and known issues with the new version as well as installation requirements, instructions, and answers to frequently asked questions.

Full article...

The SeaMonkey Suite

SeaMonkey has inherited the successful all-in-one concept of the original Netscape Communicator and continues that product line based on the modern, cross-platform architecture provided by the Mozilla project.

The Internet browser at the core of the SeaMonkey suite uses the same rendering engine and application platform as its sibling Mozilla Firefox, with popular features like tabbed browsing, feed detection, popup blocking, smart location bar, find as you type and a lot of other functionality for a smooth web experience.
SeaMonkey's Mail and Newsgroups client shares lots of code with Mozilla Thunderbird and features adaptive Junk mail filtering, tags and mail views, web feeds reading, tabbed messaging, multiple accounts, S/MIME, address books with LDAP support and is ready for both private and corporate use.
Additional components include an easy-to-use HTML Editor, the ChatZilla IRC chat application and web development tools like a DOM Inspector and a JavaScript debugger.
If that's still not enough, SeaMonkey can be extended with numerous Add-Ons that provide additional functionality and customization for a complete Internet experience.

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The SeaMonkey® Project