[waitwhat]

Why? What is so special about the browser? (or is my sarcasm detector failing again?)

[dexen]

Unlike most desktop apps, browsers interface user directly with the internet, and it is dangerous out there.

For example, theres' case of stealing text from copy/paste buffer http://news.ycombinator.com/item?id=3314004

[dfxm12]

More and more desktop apps are interfacing the users with the Internet though, especially when you extrapolate Apple's model with their app store.

It is just as dangerous "in here" too...

[JonnieCache]

Browsers get used as word processors, chatrooms etc.