Web Browser – History, purpose, working of Web Browsers

What is web browser?

A web browser is software used to search and view web pages on internet. After fetching it from the web server, the web browser displays information on the user’s screen. A web acts as an interface between the user and the internet. The web browser can display text and graphics to the user.

The browser contracts a web server and sends a request for the required information. The web server finds out the information for the requested web page and sends this information to the web browser. The browser gets the information and then shows it on the user’s computer.

In modern world, we have many examples of web browsers helping billions of users in every field of work.

History of Web browser

Purpose of web browser

The purpose of a web browser is to retrieve, present, and traverse information resources on the World Wide Web. An information resource is identified by a Uniform Resource Locator (URL) and may be a web page, image, video, or other piece of content.

Here are the main functions and features of web browsers:

Retrieving Information

Web browsers request information from web servers using the Hypertext Transfer Protocol (HTTP) or its secure version, HTTPS. When a user enters a URL in the browser’s address bar or clicks on a link, the browser sends a request to the server hosting that resource, asking it to send the data to the user’s device.

Rendering Web Pages

Once the browser receives the data, it interprets and displays it on the user’s device. This involves parsing HTML, CSS, and JavaScript code to render the structure, layout, style, and functionality of web pages.

Navigation

Browsers enable users to navigate from one web page to another through hyperlinks. They provide forward and back buttons to navigate through the user’s history of visited pages, a refresh button to reload the current page, and a home button to return to the browser’s default start page.

User Interface

Browsers offer a user interface that includes the address bar for entering URLs, a search bar for web searches, bookmarks for saving favorite websites, and tabs for opening multiple pages in a single window.

Privacy and Security

Modern browsers include features to protect user privacy and enhance security, such as private browsing modes that do not save browsing history, pop-up blockers, and built-in protections against malware and phishing attacks.

Extensions and Plugins

Browsers support extensions (also known as add-ons or plugins), which are small software programs that add new features or functionality to the browser. These can include ad blockers, password managers, and tools for web development.

Standards Compliance

Browsers are designed to comply with web standards published by the World Wide Web Consortium (W3C) and other organizations. This ensures that web pages display and function correctly across different browsers and devices.

Working on Web Browser

The working of web browser is based on retrieving information from the World Wide Web and display it on the user’s screen. This information is transferred through a protocol called Hypertext Transfer Protocol. It defines how images, texts, and videos are transmitted on the web. The web pages are made up of HTML (Hyper Text Markup Language). HTML is used for making static web pages.

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