Developer website: Mozilla.org
SeaMonkey is a Web browser that shares much of the same base code as the popular Firefox Web browser. It also contains an advanced e-mail and newsgroup client, IRC chat client, and HTML editor.
The SeaMonkey project is a community effort to deliver production-quality releases of code derived from the application formerly known as "Mozilla Application Suite". Whereas the main focus of the Mozilla Foundation is on Mozilla Firefox and Mozilla Thunderbird, our group of dedicated volunteers works to ensure that you can have "everything but the kitchen sink" and have it stable enough for corporate use.
- SeaMonkey 2.49.3 uses the same backend as Firefox and contains the relevant Firefox 52.7.3 ESR security fixes.
- SeaMonkey 2.49.3 shares most parts of the mail and news code with Thunderbird.
- SeaMonkey now uses gtk3 on Linux.
- OS X 10.9 or later