Rajveer Singh Rathore 24 December 2010 I am not sure how efficient -moz-any() really is, when it comes to performance. I can think that it’s considerably less efficient than .title <h1 class=“title”> Good thoughts around the typography. calc() is my favorite. For few of them, I am happy to survive without advanced CSS which shall makes things effortless, and might reduce the mark-up by a few KBs while making it look much cleaner. BUT cry so badly on the time of testing CSS performance. Although these are so tempting that I will not hesitate trying each one of them on personal websites.