Marquee in Mozilla
News to me: Mozilla supports the
<marquee> element (marquee test page)! Support was added a couple of months ago in light of the fact that
nearly 30% of top 150 sites in China use the marquee
element. Bug 156979 contains a fascinating discussion of this issue and why the decision was made to implement this controversial extension to the standards. Hogarth has a page detailing a way of disabling the behaviour of the element in your own Mozilla installation.