From the amazing engineers at Google (whom I expect to be putting a film of everyone's life on the Net soon, if their current rate of data collection continues), comes Google Chrome, a lightweight alternative to Internet Explorer.
It's now out of Beta. It is really very fast loading web pages compared to either Internet Explorer or even Mozilla Firefox. But it has some odd and intermittent glitches which seem to hit at frustrating moments.
Bottom line: if you are medium to advanced in computers, give it a try. If not, stick with Mozilla Firefox (or IE in a real pinch).