SeaMonkey is a software suite developed to join in a single pack of applications all the tools that a user may need when it comes to browsing. Logically the browser is the cornerstone of the suite, that also includes an IRC client, a code editor, an address book and an email client.
The most complete pack of tools to browse the Internet
It's understandable that the tools aren't precisely the most advanced in their field, but the pack fulfils its job perfectly and can mean a great advantage for those that prefer simplicity and good functioning.
Since it has been developed by the same company, SeaMonkey and Firefox share many similarities in what regards to the browsing. The Gecko engine is in charge of rendering the web page and the base of the Thunderbird email client is the same that is integrated into this suite.
All the applications are integrated into the same interface, based on the browser. We will have quick and simple access to any function by means of buttons located at the bottom of the interface. Even though we can configure it if we want it to start another component of SeaMonkey by default.