The manufacturers of Web browsers often create their own ____ extensions.

Name: The manufacturers of Web browsers often create their own ____ extensions.
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Quizplus · Accepted Answer

This is because "proprietary" means something that is owned and made exclusively by a particular company or individual. In this case, the browser manufacturers create their own proprietary extensions that are unique to their product and not available to others.

The Manufacturers of Web Browsers Often Create Their Own ____