Html Marquee Text On My Site Moves At A Weird Speed But When It's Viewed In Chrome, It's Perfectly Fine?

Here is my HTML file:

This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/marquee

The truespeed attribute in particular has no support in either Opera or Safari.

Solution 2:

This tag is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

https://developer.mozilla.org/en/docs/Web/HTML/Element/marquee

Why don't you create a marquee with pure CSS using keyframes, like that:

http://codepen.io/gabrielgodoy/pen/mEdZbr

@keyframes scroll{
  0% {
   left: 100%;
  }
  100% {
    left: -800px;
  }
}

And the on the element that you want to move:

animation: scroll 10s linear infinite;