The project name for the Mozilla Suite. The Mozilla Foundation has announced that there won't be any more official releases of the Mozilla Application Suite.
SelectProfile
Firefox parameter that displays the select profile list before starting Firefox.
sheriff
Every day a person from the Mozilla community, called the sheriff, is selected to watch over the build tree.
smoke test
A minimal set of test cases that are required to pass/work for the latest changes to be considered accepted.
spam
Unwanted commercial (advertising) emails, always from disreputable companies. Doing business with a spammer is roughly equivalent to giving your credit card to a complete stranger.
spybot
See spyware.
spyware
A malicious program that gathers information about the user and relays that information to a third party.
super-review (or sr)
See http://www.mozilla.org/hacking/reviewers.html; a second, more demanding review of a patch.
stderr
The UNIX standard error output stream, usually sent to the terminal.
stdout
The UNIX standard printed output stream, usually sent to the terminal; however, it can be redirected to a file or printer.
style sheet
See Cascading Style Sheet.
%systemroot%
The Windows environment variable, usually C:\windows.