extension - n. a small software program that can be added on to a browser
browser - n. a computer program that is used to find and look at information on the Internet
spell checker - n. a computer program that finds and corrects misspelled words in documents, e-mail, etc.
cyberbully - v. the use of electronic communication to bully a person, typically by sending messages of an intimidating or threatening nature.
prompt - v. to cause (someone) to do something