Definitions for "Hijacker"
a program which changes some settings in your browser
a software application that takes control of your browser's settings
a specific type of gackware that surreptitiously changes home page and search settings to use its creator's web pages
a type of spyware designed by certain online publishers that allow them to snoop on your browsing activity, invade your privacy, and flood you with those annoying pop-up ads
Spyware designed to track a web user's browsing activity, and serve up pop-up ads and other unsolicited communication based on his or her browsing habits.
a holdup man who stops a vehicle and steals from it
someone who uses force to take over a vehicle (especially an airplane) in order to reach an alternative destination