the browser war is over
The browser war was underway when there was nearly 50-50 market share between the two.
That was the browser war. This is the time leading up to the second browser war. It may not be Mozilla, it may not be any browser available today, but eventually there will be a browser which slowly begins to gain ground., and then we will see a browser war again.
The number of IE users is huge - you cannot expect a new version of some revolutionary browser to come out and have everyone switch.