It's the stable version that matters, not preview one, since preview versions don't get pushed to users, and it's only a very tiny amount of people using them.

It's the stable version that matters, not preview one, since preview versions don't get pushed to users, and it's only a very tiny amount of people using them. Microsoft thinks in 1 year cycles, Google and now Mozilla, too, think in 6-8 weeks cycles of releasing stable browsers with new features. IE will give new features only once per year to most users.