Competition Makes it Better
Due to intensifying competition in the web browser industry, developers usually have the need to fight for the market share. They try to get the edge over one another, supposedly giving everyone, especially the people better services, among other benefits.
Traditionally security is thought to be managed easily with centralized control. To the contrary, however, this gives easier access to potential hackers. Case in point: previously just by just targeting Internet Explorer on Windows, malicious hackers could get 90% of the web. But now, the market has spread out among different browsers, and IE’s share is lower. There’s Firefox, Opera and Safari on Windows, Intel Macs, Linux, and PowerPC Macs. So the bad guys just have to settle for less.
Of course, as IE still holds the majority share, it’s still a big target. But the risk is less.