Web Browser
A web browser is an application that fetches web pages from servers and displays them. It requests pages over HTTP or HTTPS, then parses the HTML, applies CSS, runs JavaScript and draws the result on screen.
Each browser has a rendering engine (Blink in Chrome and Edge, WebKit in Safari, Gecko in Firefox) and a JavaScript engine (such as V8). Browsers also manage tabs, bookmarks, history, cookies and storage, and enforce security rules such as the same-origin policy. Chrome, Safari, Edge and Firefox are the most used.

