SeaMonkey
Internet suite
From Wikipedia, the free encyclopedia
SeaMonkey is a free and open-source Internet suite.[5] It is the continuation of the former Mozilla Application Suite, based on the same source code,[6] which itself grew out of Netscape Communicator and formed the base of Netscape 6 and Netscape 7.[7]
| SeaMonkey | |
|---|---|
SeaMonkey Navigator 2.53.17.1 on Windows 10 | |
| Developer | SeaMonkey Council |
| Initial release | January 30, 2006 |
| Stable release | |
| Preview release | 2.53.22 Beta 1 (31 October 2025[2]) [±] |
| Written in | C++, XUL, XBL, JavaScript |
| Engines | Gecko, SpiderMonkey |
| Operating system | Windows, macOS, Linux[3] |
| Available in | 26 languages[3] |
List of languages Belarusian, Catalan, Chinese (Simplified), Chinese (Traditional), Czech, Dutch, English (US), English (British), Finnish, French, Galician, German, Hungarian, Italian, Japanese, Lithuanian, Norwegian (Bokmål), Polish, Portuguese (Portugal), Russian, Slovak, Spanish (Argentina), Spanish (Spain), Swedish, Turkish, Ukrainian | |
| Type | Internet suite |
| License | MPL-2.0[4] |
| Website | seamonkey-project.org |
| Repository | |
SeaMonkey was created in 2005 after the Mozilla Foundation decided to focus on the standalone projects Firefox and Thunderbird. The development of SeaMonkey is community-driven, in contrast to the Mozilla Application Suite, which until its last released version (1.7.13) was governed by the Mozilla Foundation. The new project-leading group is called the SeaMonkey Council.[5]
Compared to Firefox, the SeaMonkey web browser keeps the more traditional-looking interface of Netscape and the Mozilla Application Suite. It also retains the legacy XPCOM-based add-on system which allows the user to extend SeaMonkey by modifying add-ons for Thunderbird or the add-ons that were formerly compatible with Firefox before the latter switched to WebExtensions.[8][9]
Components
SeaMonkey consists of a web browser (which is a descendant of the Netscape family),[10] an email and news client program (SeaMonkey Mail & Newsgroups, which shares code with Mozilla Thunderbird), an HTML editor (SeaMonkey Composer) an IRC client (ChatZilla), and an RSS feed reader. The software suite supports skins. It comes with two skins in the default installation, Modern and Classic.[11]

SeaMonkey Mail is a traditional e-mail client that includes support for multiple accounts, junk mail detection, message filters, HTML message support, and address books, among other features such as a calendar.[12] It shares code with Mozilla Thunderbird; both Thunderbird and SeaMonkey are built from Mozilla's comm-central source tree.[13]
Composer

SeaMonkey Composer is a WYSIWYG HTML editor descended from Mozilla Composer. Its main user interface features four tabs: Normal (WYSIWYG), HTML tags, HTML code, and browser preview. The generated code is HTML 4.01 Transitional.[14]
Naming
To avoid confusing organizations that still want to use the original Mozilla Application Suite, the new product needed a new name. After initial speculation by members of the community, a July 2, 2005 announcement confirmed that SeaMonkey would officially become the name of the Internet suite superseding the Mozilla Application Suite.[15]
"Seamonkey" (with a lowercase "m") refers to brine shrimp and had been used by Netscape and the Mozilla Foundation as a code name for the never-released Netscape Communicator 5 and later the Mozilla Application Suite itself. Originally, the name "Seamonkey" was derived by Netscape management to replace "Buttmonkey", which their developers had chosen following an internal contest for the codename.[16]
The SeaMonkey Council has now trademarked the name with help from the Mozilla Foundation.[17] The project uses a separate numbering scheme, with the first release being called SeaMonkey 1.0. Despite having a different name and version number, SeaMonkey 1.0 is based on the same code as Mozilla Application Suite 1.7.
For trademark and copyright reasons, Debian rebranded SeaMonkey and distributed it as Iceape until 2013.[18]
History
On March 10, 2005, the Mozilla Foundation announced that it would not release any official versions of Mozilla Application Suite beyond 1.7.x, since it had now focused on the standalone applications Firefox and Thunderbird.[19] However, the Foundation emphasized that it would still provide infrastructure for community members who wished to continue development. In effect, this meant that the suite would still continue to be developed, but now by the SeaMonkey Council instead of the Mozilla Foundation.[citation needed]
SeaMonkey was first released on September 15, 2005. SeaMonkey 1 was released on January 30, 2006.[3]
Core Mozilla project source code was licensed under a disjunctive tri-license (before changing to MPL 2.0) that gave the choice of one of the three following sets of licensing terms: Mozilla Public License, version 1.1 or later, GNU General Public License, version 2.0 or later, GNU Lesser General Public License, version 2.1 or later.[20]
Release history
Parts of this table are based on the SeaMonkey release notes, and status meetings.
| Gecko branch | Version | Release date | Significant changes |
|---|---|---|---|
| 1.8.0 | 1.0 | January 30, 2006[21] | Official version 1.0 release. |
| 1.0.1 | April 13, 2006 | Security updates and native support for Intel-based Macintosh computers, via Universal Binary. | |
| 1.0.2 | June 1, 2006 | Stability improvement and security fixes. | |
| 1.0.3 | July 27, 2006 | Stability improvement and security fixes. | |
| 1.0.4 | August 2, 2006 | Small fix for a regression with the Microsoft Media Server protocol in 1.0.3. | |
| 1.0.5 | September 14, 2006 | Stability improvement and security fixes. | |
| 1.0.6[22] | November 8, 2006 | Stability improvement and security fixes. | |
| 1.0.7 | December 20, 2006[23] | Stability improvement and security fixes. | |
| 1.0.8 | February 27, 2007 | Stability improvement and security fixes. | |
| 1.0.9 | May 30, 2007 | Stability improvement and security fixes. Marks the end of life for SeaMonkey 1.0.x series. | |
| 1.8.1 | 1.1 | January 18, 2007 | Official version 1.1 release. Major feature work |
| 1.1.1 | February 28, 2007 | Stability improvement and security fixes. | |
| 1.1.2 | May 30, 2007 | Stability improvement and security fixes. | |
| 1.1.3 | July 19, 2007 | Stability improvement and security fixes. | |
| 1.1.4 | August 3, 2007 | Stability improvement and security fixes. | |
| 1.1.5 | October 19, 2007 | Stability improvement and security fixes. | |
| 1.1.6 | November 5, 2007 | Several small problems in displaying certain web pages corrected | |
| 1.1.7 | November 30, 2007 | Stability improvement and security fixes. Problem with running SeaMonkey from read-only application directories corrected. The last to be built for Solaris 8. | |
| 1.1.8 | February 7, 2008 | Stability improvement and security fixes. | |
| 1.1.9 | March 25, 2008 | Stability improvement and security fixes. | |
| 1.1.10 | July 2, 2008 | Stability improvement and security fixes. | |
| 1.1.11 | July 15, 2008 | Stability improvement and security fixes. | |
| 1.1.12 | September 23, 2008 | Stability improvement and security fixes. | |
| 1.1.13 | November 12, 2008 | Stability improvement and security fixes. | |
| 1.1.14 | December 16, 2008 | Stability improvement and security fixes. | |
| 1.1.15 | March 18, 2009 | Stability improvement and security fixes. | |
| 1.1.16 | April 8, 2009 | Stability improvement and security fixes. | |
| 1.1.17 | June 22, 2009 | Stability improvement and security fixes. | |
| 1.1.18 | September 3, 2009 | Stability improvement and security fixes. | |
| 1.1.19 | March 16, 2010 | Stability improvement and security fixes. End-of-life of 1.1.x product line. The last to support Windows 98/Me. The last to be built for Solaris 10. | |
| 1.9.1 | 2.0 | October 27, 2009 | Official version 2.0 release. |
| 2.0.1 | December 15, 2009 | Stability improvement and security fixes. | |
| 2.0.2 | January 11, 2010 | Stability improvement and security fixes. | |
| 2.0.3 | February 17, 2010 | Stability improvement and security fixes. | |
| 2.0.4 | March 30, 2010 | Stability improvement and security fixes. | |
| 2.0.5 | June 22, 2010 | Stability improvement and security fixes. | |
| 2.0.6 | July 20, 2010 | Stability improvement and security fixes. | |
| 2.0.7 | September 7, 2010 | Stability improvement and security fixes. | |
| 2.0.8 | September 15, 2010 | Stability improvements only. | |
| 2.0.9 | October 20, 2010 | Stability improvement and security fixes. | |
| 2.0.10 | October 28, 2010 | Security fix. | |
| 2.0.11 | December 9, 2010 | Stability improvement and security fixes. | |
| 2.0.12 | March 2, 2011 | Security fix. | |
| 2.0.13 | March 23, 2011 | Stability improvement and security fixes. | |
| 2.0.14 | April 28, 2011 | Stability improvement and security fixes.
This is the last version to support Mac OS X 10.4 Tiger and PowerPC Macs | |
| 2.0 | 2.1 | June 10, 2011 | Official version 2.1 release. The last to be built for OS/2. |
| 5.0 | 2.2 | July 7, 2011 | Official version 2.2 release. |
| 6.0 | 2.3 | August 16, 2011 | Official version 2.3 release. |
| 2.3.1 | August 23, 2011[24] | Official version 2.3.1 release. Added a security certificate in order to avoid disabling future automatic software updates. | |
| 2.3.2 | August 31, 2011 | Official version 2.3.2 release. Removed root certificate for Diginotar. Many downloads erroneously identify themselves as version 2.3.1.[25] | |
| 2.3.3 | September 6, 2011 | Official version 2.3.3 release. Removed trust exceptions for certificates issued by Staat der Nederlanden. Fixed an error with .gov.uk domains. | |
| 7.0 | 2.4 | September 27, 2011 | Official version 2.4 release. |
| 2.4.1 | September 29, 2011 | Official version 2.4.1 release. | |
| 8.0 | 2.5 | November 22, 2011 | Official version 2.5 release. |
| 9.0 | 2.6 | December 20, 2011 | Official version 2.6 release. |
| 2.6.1 | December 22, 2011 | Official version 2.6.1 release. | |
| 10.0 | 2.7 | January 31, 2012 | Official version 2.7 release. |
| 2.7.1 | February 10, 2012 | Official version 2.7.1 release. | |
| 2.7.2 | February 17, 2012 | Official version 2.7.2 release. | |
| 11.0 | 2.8 | March 13, 2012 | Official version 2.8 release. |
| 12.0 | 2.9 | April 24, 2012 | Official version 2.9 release. |
| 2.9.1 | April 30, 2012 | Official version 2.9.1 release.[26] This is the last version to support Windows 2000.[27] | |
| 13.0 | 2.10 | June 6, 2012 | Official version 2.10 release. Introduction of tabs lazy loading. |
| 2.10.1 | June 16, 2012 | Official version 2.10.1 release. | |
| 14.0 | 2.11 | July 17, 2012 | Official version 2.11 release. |
| 15.0 | 2.12 | August 28, 2012 | Official version 2.12 release. |
| 2.12.1 | September 10, 2012 | Official version 2.12.1 release. | |
| 16.0 | 2.13 | October 9, 2012 | Official version 2.13 release. |
| 2.13.1 | October 12, 2012 | Official version 2.13.1 release. | |
| 2.13.2 | October 27, 2012 | Official version 2.13.2 release. Last version supported on Mac OS X 10.5 | |
| 17.0 | 2.14 | November 9, 2012 | Official version 2.14. |
| 2.14.1 | November 30, 2012 | Official version 2.14.1. | |
| 18.0 | 2.15 | January 8, 2013 | Official version 2.15 release. |
| 2.15.1 | January 20, 2013 | Official version 2.15.1 release. | |
| 2.15.2 | February 4, 2013 | Official version 2.15.2 release. | |
| 19.0 | 2.16 | February 21, 2013 | Official version 2.16 release. |
| 2.16.1 | March 8, 2013 | Official version 2.16.1 release. | |
| 2.16.2 | March 13, 2013 | Official version 2.16.2 release. | |
| 20.0 | 2.17 | April 2, 2013 | Official version 2.17 release. |
| 2.17.1 | April 14, 2013 | Official version 2.17.1 release. | |
| 22.0 | 2.19 | July 2, 2013 | Official version 2.19 release. |
| 23.0 | 2.20 | August 6, 2013 | Official version 2.20 release. TLS 1.1 support.[28] |
| 24.0 | 2.21 | September 17, 2013 | Official version 2.21 release. TLS 1.2 support.[28] |
| 25.0 | 2.22 | October 30, 2013 | Official version 2.22 release. |
| 2.22.1 | November 18, 2013 | Official version 2.22.1 release. | |
| 26.0 | 2.23 | December 12, 2013 | Official version 2.23 release. |
| 27.0 | 2.24 | February 6, 2014 | Official version 2.24 release. |
| 28.0 | 2.25 | March 19, 2014 | Official version 2.25 release. |
| 29.0 | 2.26 | May 2, 2014 | Official version 2.26.0 release. |
| 2.26.1 | June 16, 2014 | Official version 2.26.1 release. | |
| 32.0 | 2.29 | September 7, 2014 | Official version 2.29 release. |
| 2.29.1 | September 24, 2014 | Official version 2.29.1 release. | |
| 33.0 | 2.30 | October 15, 2014 | Official version 2.30 release. |
| 34.0 | 2.31 | December 4, 2014 | Official version 2.31 release. |
| 35.0 | 2.32 | January 13, 2015 | Official version 2.32 release. |
| 2.32.1 | February 6, 2015 | Official version 2.32.1 release. | |
| 36.0 | 2.33 | March 10, 2015 | Official version 2.33 release. |
| 2.33.1 | March 24, 2015 | Official version 2.33.1 release. | |
| 38.0 | 2.35 | September 3, 2015 | Official version 2.35 release. |
| 41.0 | 2.38 | September 26, 2015 | Official version 2.38 release. |
| 42.0 | 2.39 | November 8, 2015 | Official version 2.39 release. |
| 43.0 | 2.40 | March 14, 2016 | Official version 2.40 release. This is the last version to support CPUs without SSE2 under Windows. This is the last version to support Mac OS X 10.6-10.8.[29] |
| 49.0 | 2.46 | December 22, 2016 | Official version 2.46 release. |
| 51.0 | 2.48 | July 31, 2017 | Official version 2.48 release. This is the last version to support GTK2 on Linux. |
| 52.4 | 2.49.1 | November 4, 2017 | Official version 2.49.1 release. Built from the same Extended Support Release (ESR) branch as Firefox 52 ESR and Thunderbird 52. |
| 52.6 | 2.49.2 | February 15, 2018 | Official version 2.49.2 release. Built from the same Extended Support Release (ESR) branch as Firefox 52 ESR and Thunderbird 52. |
| 52.7.3 | 2.49.3 | May 4, 2018 | Official version 2.49.3 release. Built from the same Extended Support Release (ESR) branch as Firefox 52 ESR and Thunderbird 52. |
| 52.9.1 | 2.49.4 | July 27, 2018 | Official version 2.49.4 release. Built from the same Extended Support Release (ESR) branch as Firefox 52 ESR and Thunderbird 52. This is the last version to support plugins other than Flash on macOS.[30] |
| 2.49.5 | September 4, 2019 | Official version 2.49.5 release. Built from the same Extended Support Release (ESR) branch as Firefox 52 ESR and Thunderbird 52. This is the last version to support Windows XP/Server 2003 and Windows Vista/Server 2008. This is the last version to support ALSA on Linux. This is the last version to support NPAPI plugins other than Flash.[30] | |
| 60.3 and later | 2.53.1 | February 28, 2020 | Updates backported from multiple Extended Support Release (ESR) branches.[31] |
| 2.53.2 | May 3, 2020 | ||
| 60.4 and later | 2.53.3 | July 7, 2020 | |
| 60.6 and later | 2.53.4 | September 22, 2020 | |
| 60.8 and later | 2.53.5 | November 13, 2020 | |
| 2.53.5.1 | November 17, 2020 | ||
| 2.53.6 | January 22, 2021 | Last version to include support for NPAPI plugins.[32] | |
| 2.53.7 | March 10, 2021 | Updates backported from multiple Extended Support Release (ESR) branches.[31] | |
| 2.53.7.1 | April 15, 2021 | ||
| 2.53.8 | June 30, 2021 | ||
| 2.53.9 | August 26, 2021 | ||
| 2.53.9.1 | September 28, 2021 | ||
| 2.53.10 | November 16, 2021 | ||
| 2.53.10.1 | December 13, 2021 | ||
| 2.53.10.2 | December 28, 2021 | ||
| 2.53.11 | March 2, 2022 | ||
| 2.53.11.1 | March 25, 2022 | ||
| 2.53.12 | May 4, 2022 | ||
| 2.53.13 | July 11, 2022 | ||
| 2.53.14 | September 29, 2022 | ||
| 2.53.15 | January 20, 2023 | ||
| 2.53.16 | March 31, 2023 | ||
| 2.53.17 | August 4, 2023 | ||
| 2.53.17.1 | September 20, 2023 | ||
| 2.53.18 | December 9, 2023 | ||
| 2.53.18.1 | January 16, 2024 | ||
| 2.53.18.2 | March 28, 2024 | ||
| 2.53.19 | September 4, 2024 | ||
| 2.53.20 | January 7, 2025 | ||
| 2.53.21 | June 5, 2025 | This is the last version to support 32-bit editions.[33] | |
| 2.53.22 | October 31, 2025 | Updates backported from multiple Extended Support Release (ESR) branches.[31] | |
| 2.53.23 | December 31, 2025 | Official version 2.53.23 release. Built from the same Extended Support Release (ESR) branch as Firefox 60 ESR and Thunderbird 60. This is the last version to support Windows 7/Server 2008 R2, Windows 8/Server 2012 and Windows 8.1/Server 2012 R2.[34] |