Browser extensions enhance web functionality by adding specific features or capabilities to web browsers, significantly improving the user's experience. These add-ons can assist with tasks such as ad blocking, password management, productivity enhancements, and content filtering. By allowing users to customize their browsing experience according to personal preferences, browser extensions facilitate more efficient and engaging interactions with web content. Popular examples of extensions include AdBlock, Evernote Web Clipper, and Grammarly. Their versatility and ease of installation contribute to their widespread adoption among web users.