Lightweight web browsers are designed to use fewer system resources compared to standard browsers. They are ideal for older computers or devices with limited processing power and memory. These browsers often focus on speed and efficiency, providing a basic browsing experience without the extra features that can slow down performance. Examples of lightweight web browsers include Midori, Pale Moon, and Lynx. These browsers typically have a simple user interface and may lack advanced functionalities like extensive plugin support. They are suitable for users who prioritize quick access to the internet over additional features.