Even if they rolled out to 100% of the users on day 1, you'd sill have an hetero...

		WhyNotHugo 10 months ago \| parent \| context \| favorite \| on: Default styles for h1 elements are changing Even if they rolled out to 100% of the users on day 1, you'd sill have an heterogeneous audience with all the folks using older versions of Firefox. It likely takes (at least) many months before 99% of Firefox users upgrade to a any specific release.