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]

DeveloperSeaMonkey Council
Initial releaseJanuary 30, 2006; 20 years ago (2006-01-30)
Stable release
2.53.23[1] Edit this on Wikidata / 31 December 2025
Preview release2.53.22 Beta 1 (31 October 2025; 4 months ago (2025-10-31)[2]) [±]
Quick facts Developer, Initial release ...
SeaMonkey
DeveloperSeaMonkey Council
Initial releaseJanuary 30, 2006; 20 years ago (2006-01-30)
Stable release
2.53.23[1] Edit this on Wikidata / 31 December 2025
Preview release2.53.22 Beta 1 (31 October 2025; 4 months ago (2025-10-31)[2]) [±]
Written inC++, XUL, XBL, JavaScript
EnginesGecko, SpiderMonkey
Operating systemWindows, macOS, Linux[3]
Available in26 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
TypeInternet suite
LicenseMPL-2.0[4]
Websiteseamonkey-project.org
Repository
Close

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]

Mail

SeaMonkey Mail & Newsgroups 2.53.17.1

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 2.53.17.1

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.

Legend:
Unsupported
Latest version
Preview version
More information Gecko branch, Version ...
Release history
Gecko branch Version Release date Significant changes
1.8.0 Unsupported: 1.0 January 30, 2006[21] Official version 1.0 release.
Unsupported: 1.0.1 April 13, 2006 Security updates and native support for Intel-based Macintosh computers, via Universal Binary.
Unsupported: 1.0.2 June 1, 2006 Stability improvement and security fixes.
Unsupported: 1.0.3 July 27, 2006 Stability improvement and security fixes.
Unsupported: 1.0.4 August 2, 2006 Small fix for a regression with the Microsoft Media Server protocol in 1.0.3.
Unsupported: 1.0.5 September 14, 2006 Stability improvement and security fixes.
Unsupported: 1.0.6[22] November 8, 2006 Stability improvement and security fixes.
Unsupported: 1.0.7 December 20, 2006[23] Stability improvement and security fixes.
Unsupported: 1.0.8 February 27, 2007 Stability improvement and security fixes.
Unsupported: 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 Unsupported: 1.1 January 18, 2007 Official version 1.1 release. Major feature work
Unsupported: 1.1.1 February 28, 2007 Stability improvement and security fixes.
Unsupported: 1.1.2 May 30, 2007 Stability improvement and security fixes.
Unsupported: 1.1.3 July 19, 2007 Stability improvement and security fixes.
Unsupported: 1.1.4 August 3, 2007 Stability improvement and security fixes.
Unsupported: 1.1.5 October 19, 2007 Stability improvement and security fixes.
Unsupported: 1.1.6 November 5, 2007 Several small problems in displaying certain web pages corrected
Unsupported: 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.
Unsupported: 1.1.8 February 7, 2008 Stability improvement and security fixes.
Unsupported: 1.1.9 March 25, 2008 Stability improvement and security fixes.
Unsupported: 1.1.10 July 2, 2008 Stability improvement and security fixes.
Unsupported: 1.1.11 July 15, 2008 Stability improvement and security fixes.
Unsupported: 1.1.12 September 23, 2008 Stability improvement and security fixes.
Unsupported: 1.1.13 November 12, 2008 Stability improvement and security fixes.
Unsupported: 1.1.14 December 16, 2008 Stability improvement and security fixes.
Unsupported: 1.1.15 March 18, 2009 Stability improvement and security fixes.
Unsupported: 1.1.16 April 8, 2009 Stability improvement and security fixes.
Unsupported: 1.1.17 June 22, 2009 Stability improvement and security fixes.
Unsupported: 1.1.18 September 3, 2009 Stability improvement and security fixes.
Unsupported: 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 Unsupported: 2.0 October 27, 2009 Official version 2.0 release.
Unsupported: 2.0.1 December 15, 2009 Stability improvement and security fixes.
Unsupported: 2.0.2 January 11, 2010 Stability improvement and security fixes.
Unsupported: 2.0.3 February 17, 2010 Stability improvement and security fixes.
Unsupported: 2.0.4 March 30, 2010 Stability improvement and security fixes.
Unsupported: 2.0.5 June 22, 2010 Stability improvement and security fixes.
Unsupported: 2.0.6 July 20, 2010 Stability improvement and security fixes.
Unsupported: 2.0.7 September 7, 2010 Stability improvement and security fixes.
Unsupported: 2.0.8 September 15, 2010 Stability improvements only.
Unsupported: 2.0.9 October 20, 2010 Stability improvement and security fixes.
Unsupported: 2.0.10 October 28, 2010 Security fix.
Unsupported: 2.0.11 December 9, 2010 Stability improvement and security fixes.
Unsupported: 2.0.12 March 2, 2011 Security fix.
Unsupported: 2.0.13 March 23, 2011 Stability improvement and security fixes.
Unsupported: 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 Unsupported: 2.1 June 10, 2011 Official version 2.1 release.
The last to be built for OS/2.
5.0 Unsupported: 2.2 July 7, 2011 Official version 2.2 release.
6.0 Unsupported: 2.3 August 16, 2011 Official version 2.3 release.
Unsupported: 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.
Unsupported: 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]
Unsupported: 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 Unsupported: 2.4 September 27, 2011 Official version 2.4 release.
Unsupported: 2.4.1 September 29, 2011 Official version 2.4.1 release.
8.0 Unsupported: 2.5 November 22, 2011 Official version 2.5 release.
9.0 Unsupported: 2.6 December 20, 2011 Official version 2.6 release.
Unsupported: 2.6.1 December 22, 2011 Official version 2.6.1 release.
10.0 Unsupported: 2.7 January 31, 2012 Official version 2.7 release.
Unsupported: 2.7.1 February 10, 2012 Official version 2.7.1 release.
Unsupported: 2.7.2 February 17, 2012 Official version 2.7.2 release.
11.0 Unsupported: 2.8 March 13, 2012 Official version 2.8 release.
12.0 Unsupported: 2.9 April 24, 2012 Official version 2.9 release.
Unsupported: 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 Unsupported: 2.10 June 6, 2012 Official version 2.10 release. Introduction of tabs lazy loading.
Unsupported: 2.10.1 June 16, 2012 Official version 2.10.1 release.
14.0 Unsupported: 2.11 July 17, 2012 Official version 2.11 release.
15.0 Unsupported: 2.12 August 28, 2012 Official version 2.12 release.
Unsupported: 2.12.1 September 10, 2012 Official version 2.12.1 release.
16.0 Unsupported: 2.13 October 9, 2012 Official version 2.13 release.
Unsupported: 2.13.1 October 12, 2012 Official version 2.13.1 release.
Unsupported: 2.13.2 October 27, 2012 Official version 2.13.2 release. Last version supported on Mac OS X 10.5
17.0 Unsupported: 2.14 November 9, 2012 Official version 2.14.
Unsupported: 2.14.1 November 30, 2012 Official version 2.14.1.
18.0 Unsupported: 2.15 January 8, 2013 Official version 2.15 release.
Unsupported: 2.15.1 January 20, 2013 Official version 2.15.1 release.
Unsupported: 2.15.2 February 4, 2013 Official version 2.15.2 release.
19.0 Unsupported: 2.16 February 21, 2013 Official version 2.16 release.
Unsupported: 2.16.1 March 8, 2013 Official version 2.16.1 release.
Unsupported: 2.16.2 March 13, 2013 Official version 2.16.2 release.
20.0 Unsupported: 2.17 April 2, 2013 Official version 2.17 release.
Unsupported: 2.17.1 April 14, 2013 Official version 2.17.1 release.
22.0 Unsupported: 2.19 July 2, 2013 Official version 2.19 release.
23.0 Unsupported: 2.20 August 6, 2013 Official version 2.20 release. TLS 1.1 support.[28]
24.0 Unsupported: 2.21 September 17, 2013 Official version 2.21 release. TLS 1.2 support.[28]
25.0 Unsupported: 2.22 October 30, 2013 Official version 2.22 release.
Unsupported: 2.22.1 November 18, 2013 Official version 2.22.1 release.
26.0 Unsupported: 2.23 December 12, 2013 Official version 2.23 release.
27.0 Unsupported: 2.24 February 6, 2014 Official version 2.24 release.
28.0 Unsupported: 2.25 March 19, 2014 Official version 2.25 release.
29.0 Unsupported: 2.26 May 2, 2014 Official version 2.26.0 release.
Unsupported: 2.26.1 June 16, 2014 Official version 2.26.1 release.
32.0 Unsupported: 2.29 September 7, 2014 Official version 2.29 release.
Unsupported: 2.29.1 September 24, 2014 Official version 2.29.1 release.
33.0 Unsupported: 2.30 October 15, 2014 Official version 2.30 release.
34.0 Unsupported: 2.31 December 4, 2014 Official version 2.31 release.
35.0 Unsupported: 2.32 January 13, 2015 Official version 2.32 release.
Unsupported: 2.32.1 February 6, 2015 Official version 2.32.1 release.
36.0 Unsupported: 2.33 March 10, 2015 Official version 2.33 release.
Unsupported: 2.33.1 March 24, 2015 Official version 2.33.1 release.
38.0 Unsupported: 2.35 September 3, 2015 Official version 2.35 release.
41.0 Unsupported: 2.38 September 26, 2015 Official version 2.38 release.
42.0 Unsupported: 2.39 November 8, 2015 Official version 2.39 release.
43.0 Unsupported: 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 Unsupported: 2.46 December 22, 2016 Official version 2.46 release.
51.0 Unsupported: 2.48 July 31, 2017 Official version 2.48 release.
This is the last version to support GTK2 on Linux.
52.4 Unsupported: 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 Unsupported: 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 Unsupported: 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 Unsupported: 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]
Unsupported: 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 Unsupported: 2.53.1 February 28, 2020 Updates backported from multiple Extended Support Release (ESR) branches.[31]
Unsupported: 2.53.2 May 3, 2020
60.4 and later Unsupported: 2.53.3 July 7, 2020
60.6 and later Unsupported: 2.53.4 September 22, 2020
60.8 and later Unsupported: 2.53.5 November 13, 2020
Unsupported: 2.53.5.1 November 17, 2020
Unsupported: 2.53.6 January 22, 2021 Last version to include support for NPAPI plugins.[32]
Unsupported: 2.53.7 March 10, 2021 Updates backported from multiple Extended Support Release (ESR) branches.[31]
Unsupported: 2.53.7.1 April 15, 2021
Unsupported: 2.53.8 June 30, 2021
Unsupported: 2.53.9 August 26, 2021
Unsupported: 2.53.9.1 September 28, 2021
Unsupported: 2.53.10 November 16, 2021
Unsupported: 2.53.10.1 December 13, 2021
Unsupported: 2.53.10.2 December 28, 2021
Unsupported: 2.53.11 March 2, 2022
Unsupported: 2.53.11.1 March 25, 2022
Unsupported: 2.53.12 May 4, 2022
Unsupported: 2.53.13 July 11, 2022
Unsupported: 2.53.14 September 29, 2022
Unsupported: 2.53.15 January 20, 2023
Unsupported: 2.53.16 March 31, 2023
Unsupported: 2.53.17 August 4, 2023
Unsupported: 2.53.17.1 September 20, 2023
Unsupported: 2.53.18 December 9, 2023
Unsupported: 2.53.18.1 January 16, 2024
Unsupported: 2.53.18.2 March 28, 2024
Unsupported: 2.53.19 September 4, 2024
Unsupported: 2.53.20 January 7, 2025
Unsupported: 2.53.21 June 5, 2025 This is the last version to support 32-bit editions.[33]
Unsupported: 2.53.22 October 31, 2025 Updates backported from multiple Extended Support Release (ESR) branches.[31]
Latest version: 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]
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References

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