Which of the following is NOT a type of web browser?

Google Docs is indeed not a web browser. It is a web-based application for document creation, editing, and collaboration that allows users to work on text documents online. Web browsers, on the other hand, are software applications specifically designed for accessing and navigating the internet, including viewing web pages and content.

The other options — Mozilla Firefox, Internet Explorer, and Google Chrome — are all well-known web browsers. They enable users to browse the internet, run web applications, and engage with various online content effectively. Recognizing the distinctions between different types of software is crucial in understanding how technology functions within different contexts.