What is a browser extension?

• A. A built-in feature of the browser for browsing
• B. A small software module that adds functionality to a web browser
• C. A type of software that generates internet browsers
• D. A program that blocks ads on websites

Answer: (B)

A browser extension is indeed a small software module that adds functionality to a web browser. Extensions enhance the user's browsing experience by providing additional features and tools that are not part of the core browser functionality. This can include a variety of capabilities such as customization options, productivity tools, or enhanced security measures.

For example, users can install an extension that integrates with their email service, adds a toolbar for easier access to functions, or even provides improved search capabilities. These extensions can be developed by third-party developers and are often available through the browser's official store.

While other options mention features related to web browsers, they do not accurately describe what a browser extension is. A built-in feature refers to standard functions that all users have access to without needing to install anything extra. Software that generates internet browsers implies the creation of browsers themselves, which is a broader category. Lastly, a program specifically blocking ads is just one function that an extension might perform, but it doesn't encompass the full range of capabilities that browser extensions can provide. Thus, the definition focusing on the added functionality captures the essence of what extensions are and their purpose.