The Seamonkey project is the organized effort to ship the first
commercial releases of browser and e-mail and page composer clients
from the mozilla source code baseline. The Seamonkey project is
organized around the milestones listed on the Project Sea Monkey
page.
“Each milestone adds additional infratstructure, features and
bug fixes. The milestones are intended to be periodic check points
for progress on the project, stability of builds, porting status,
and are entry points for additional mozilla contributors to provide
testing and engineering help on the project.”