Firefox still supports the blinking blink and marquee tag.
I have known for some time that Firefox supports the seizure
induceing <blink> tag. I mentioned this to a co-worker to and we took a short walk down memory lane OR was it a run down a dark street chased by indiscretions of our coding past. We discorvered
that Firefox not only supports blinks tag, but supports the old IE
marquee tag and what is worse is you can use them both at the same time.
An interesting bit of trivia is that is that there is even CSS support for blinking text.
text-decoration: blink;
Do we really need blinking CSS text?

http://html-lesson.blogspot.com/2008/06/marquee-sl...