What are extensions best defined as?

Extensions are best defined as tools for viewing and interacting with webpages because they are small software programs that enhance the functionality of browsers. They allow users to customize their browsing experience by adding features such as ad blockers, password managers, or enhanced search capabilities. These tools integrate directly into the web browser, enabling users to modify and interact with the webpage's content and layout effectively.

While other choices describe different types of tools, they do not capture the core functionality of extensions in the context of web browsers. Tools for creating content typically involve more complex software applications like word processors or graphic design software, while tools for editing images consist of specific editing software rather than browser enhancements. Similarly, file management tools are standalone applications or features within operating systems that do not relate directly to web browsing. This clarifies why “tools for viewing and interacting with webpages” is the most accurate definition of extensions.