The Browser Wars: Internet Explorer, Firefox and Chrome Explained
From Netscape versus Microsoft in the 1990s to Chrome's rise after 2008, the browser wars shaped web standards. Learn what happened and why it still matters.
A web browser is the software that turns a page of code into something you can read. Because every website has to work in whichever browser a visitor uses, the competition between browser makers has shaped the web as much as any website did. That competition has two main phases, and both left lasting marks on how sites are built.
The first browser war (1995-2001)
By 1995, Netscape Navigator was the leading browser. Microsoft had been late to see the importance of the internet, but in 1995 it released Internet Explorer, first as part of an add-on pack for Windows 95. The next versions improved quickly, and Microsoft began distributing Internet Explorer free with Windows. For a company that was already installed on most desktop computers, bundling was a powerful advantage.
Both companies raced to add features, and each added its own extensions to HTML and scripting without waiting for standards. A site that worked well in one browser could look broken in the other. Web developers of the time often built two versions or added notices saying "best viewed in" a particular browser.
The legal fight
The United States Department of Justice and a number of states filed an antitrust case against Microsoft in 1998, with the browser bundling among its main issues. The case ended with a ruling in 2000 and a settlement of the federal case in 2001. By then, Internet Explorer had overtaken Netscape in usage.
The quiet years
Internet Explorer 6, released in 2001, ran on a large share of computers for years, and Microsoft released few major updates for a long period. The browser was widely used, and it had its own interpretation of some standards. Developers had to write workarounds to make sites behave properly. This was the stagnant period, and it taught the web community how costly a single dominant browser can be.
The second wave
Several things changed the picture:
- Firefox. The Mozilla project, which grew out of Netscape's released code, launched Firefox 1.0 in November 2004. It supported web standards more faithfully, had tabbed browsing and an extension system, and gained users quickly.
- Safari. Apple launched its own browser in 2003, built on the KHTML engine, which became the open-source WebKit engine.
- Chrome. Google released Chrome in September 2008, with a fast JavaScript engine, a separate process for each tab and rapid release updates. It grew to become the most widely used browser on both desktop and mobile.
- Edge. Microsoft replaced Internet Explorer with Edge in 2015, and later rebuilt Edge on Chromium, the open-source core of Chrome, in 2020.
Standards win in the end
The web community learned that proprietary extensions hurt everyone. The WHATWG, a group formed by people from Apple, Mozilla and Opera, began work on HTML5 in 2004, and the W3C eventually adopted its approach. HTML5, which added native audio, video, canvas drawing and more, became the common baseline. Today browsers update frequently and automatically, and new features are tested across several engines before sites are asked to depend on them.
| Era | Lesson |
|---|---|
| 1990s: proprietary extensions | Sites broke between browsers |
| 2000s: one dominant browser | Progress stalled and workarounds multiplied |
| 2010s onward: standards and frequent updates | Sites can be built once and tested across browsers |
Engines are fewer than browsers
Many browsers share an engine. Chrome, Edge, Opera and others use Blink, Safari uses WebKit, and Firefox uses Gecko. That means that testing in a Chrome-based browser, Safari and Firefox covers almost every visitor. It also raises a question the community still debates: whether a small number of engines is good for the open web.
The browser wars on mobile
The same fight reappeared on phones. When the iPhone launched in 2007, its Safari browser brought a full desktop-class engine to a handheld device, and Android's browser used the same WebKit base. Mobile browsers quickly became the main way many people reach the web. This changed priorities for site owners: a page that works on a small screen, loads quickly on a mobile connection and responds to touch is no longer optional. Search engines now judge the mobile version of a page first, so a site that only works well on a desktop browser can be penalised.
The browser's role has widened beyond rendering. Modern browsers warn about insecure connections, block known dangerous sites, manage passwords and run applications offline. That is why the choices browser vendors make, such as the decision to mark plain HTTP sites as not secure, can change what website owners must do within a few months.
The practical lesson for site owners
The browser wars show why you should rely on standard HTML, CSS and JavaScript rather than tricks that suit one browser. Test your site in at least Chrome, Safari and Firefox, and on a phone. Also keep in mind that browsers are also the enforcers of security rules: they warn visitors about sites without HTTPS. Our security features and free SSL certificates help your site pass those checks, and the WordPress hosting plans are ready for sites that depend on a modern, standards-based setup.
