Browser
About 5 min read
Last updated: 2026-08-17
What Is a Browser
A web browser is an application that displays web pages by interpreting HTML (structure), CSS (design), and JavaScript (interactivity) received from servers. Think of the server as sending raw ingredients and the browser as the chef that cooks and plates the dish. Without a browser, you cannot view websites.
Major Browser Comparison
Chrome (Google) is the most widely used browser worldwide and offers a vast library of extensions. Safari (Apple) comes pre-installed on iPhone and Mac with excellent battery efficiency. Edge (Microsoft) ships with Windows and supports Chrome extensions. Firefox (Mozilla) is developed by a nonprofit and prioritizes privacy. All browsers can display the same websites.
How Rendering Works
From URL input to page display: (1) DNS resolves the domain name to an IP address (2) the browser sends a request to the server (3) HTML, CSS, and JavaScript are received (4) the HTML is parsed into a DOM tree (5) the CSS becomes a CSSOM, and the two are combined to calculate layout (6) the result is painted to the screen. JavaScript is fetched while the HTML is still being parsed, and unless it is marked defer or async it pauses parsing and runs at that point. How long the whole sequence takes depends heavily on your connection speed and how heavy the page is.
Privacy Features
Incognito mode (private browsing) prevents the browser from saving your browsing history and cookies locally. However, it does not make you invisible - your ISP and the servers you visit can still see your activity. Tracking prevention works differently in each browser: Safari blocks third-party cookies by default, while Firefox uses Total Cookie Protection to isolate cookies per site, which limits cross-site tracking.
Safe Browsing Tips
Always keep your browser updated to patch security vulnerabilities. Avoid installing suspicious extensions, as they can access all your browser data. Always check the URL in the address bar on login pages.
For more details, see our article What Is a Browser? How It Works and How to Stay Safe.
Common Misconceptions
- Incognito mode makes you completely anonymous
- Incognito mode only prevents data from being saved locally in your browser. Your ISP and the servers you visit can still see your activity.
- All browsers are the same
- While core functionality is similar, browsers differ in privacy protection strength, extension availability, and battery efficiency.
Browser vs Native App
Browser
A general-purpose app for viewing websites. Enter any URL to access any site.
Native App
An app optimized for a specific service. May offer push notifications, offline access, and other features not available in browsers.