SeaMonkey 2.0 Alpha 1

Released October 5, 2008

Warning! The SeaMonkey version available for download on this page is an outdated testing-only preview of an already released version of our Internet suite. Please download the stable release instead of this version.
Release Notes
The release notes contain installation instructions, system requirements, what's new, and a list of known issues that you should read before reporting bugs.
This is a testing preview for our upcoming major release. We appreciate your testing of this version as well as your feedback on how well it works for you. Please contact our newsgroups for general feedback and report bugs in Bugzilla.

Official builds

If you don't know which package is best for you, use the first package listed in the section about your operating system (platform).
MD5 sums and SHA1 sums are available for official packages and source tarballs.

Windows (32bit)
Installer (10 MB)
Interactively install SeaMonkey and, if you like, select which extensions to include.
Zipfile (14 MB)
Mac OS X
Disk Image (Universal Binary) (22 MB)
Self-mounting disk image (for use on both PowerPC and Intel processor powered Macintosh computers).
Linux (x86)
tar.bz2 file (13 MB)
Unpack to an exectuable location and run the contained "seamonkey" script.

Source code

The source code is available either as a tar package or from the source repository.

  • Source Code Tarball (bzip, 49 MB) - note that it doesn't unpack a subdirectory itself, so create a directory to unpack it in.
  • The README file explains how to pull SeaMonkey 2.0 Alpha 1 from the source repository.


These builds are created based on work of the volunteers of the Mozilla localization team around the world. If you want to help contributing to your language, read the localization wiki page.

For SeaMonkey 2.0 Alpha 1, no fully localized builds are available, but we provide experimental language packs which you can install as add-ons to the official builds and which offer localization for most of SeaMonkey 2.0 Alpha 1, with exception of the password and download managers as well as any built-in extensions.

Contributed builds

These are unofficial builds and may be configured differently than the official SeaMonkey builds.

OS/2 zip (readme) (MD5 sum)