More often than not, however, these extensions proved harmful. Sometimes these extensions led to useful techniques that were adopted by other browsers, such as the XMLHttpRequest technology that resulted in Ajax.

But competition and innovation required that web browsers extend the standards with proprietary features (such as the HTML tags, , and ) without waiting for committee approval.

Adding proprietary features instead of obeying standards: A web browser was expected to follow the standards set down by standards committees (for example, by adhering to the HTML specifications).

Adding new features instead of fixing bugs: A web browser had to have more new features than its competition, or else it would be considered to be 'falling behind.' But with limited manpower to put towards development, this often meant that quality assurance suffered and that the software was released with serious bugs.

The browser wars encouraged two specific kinds of behavior among their combatants. Mozilla FireFox and Internet Explorer both faced some awkward vulnerabilities and exploits lately and both have quirks in their rendering engine, which makes sense when you look at the basic browser rules: ( directly from Wikipedia) Microsoft's Internet Explorer 7.0 offers this as well. Mozilla FireFox isn't the only browser with tabbed browsing, easy search and anti-phishing filter. The reasons for this are many, but most of the reasons are no longer valid.

Many people prefer Mozilla FireFox as their browser. In fact: In my opinion it's the only company I know that effectively took on a Microsoft product and led Microsoft into updating its product to remain competitive. I must admin FireFox is a pretty good product and Mozilla does a good job building and promoting it. As an IT Professional you might get the question to deploy Mozilla's FireFox browser on the workstations of your users.

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