When you open a web browser, you are given the option to add extra features that can enhance your web browsing experience. These additional features are known as:

Correct option is D

Browser plugins are additional software components that can be installed in a web browser to extend its capabilities and improve the browsing experience. They are often used for tasks like playing media, enabling custom content, or adding advanced tools.
Important Key Points:
1. Browser Plugins: These are small programs that enhance the functionality of a web browser by supporting interactive media, content formats, and specific website features.
2. Examples: Earlier examples include Adobe Flash Player, Java Plugins, and modern tools like PDF viewers or password managers.
Knowledge Booster:
· Cookies: Small text files stored on the user's computer by websites to remember user preferences or sessions, but they do not add browser features.
· Bookmarks: A feature used to save and organize URLs for easy access later, unrelated to additional functionalities.
· Tabs: Allow multiple web pages to be open in the same browser window for easier navigation but are part of the browser itself.
· Modern Replacements: Extensions and add-ons have largely replaced plugins in modern browsers due to advancements in HTML5 and web standards.