Why there is -moz-XXX and -webkit-XXX in the CSS3?

Question

The thing I hate most in CSS3 is that there is always two properties you should put to do one effect. I think this is not professional, and increase the CSS size. For example, w

Answer 1

-webkit-border-radius and -moz-border-radius were created before the CSS3 borders standard was a complete (it is still not an approved standard - it is currently a Candidate Recommendation).

The standard calls for a border-radius only, as you can see from the specification.

They are specific to mozilla and webkit - once the standard is approved this should change to be border-radius on all supporting browsers.