[CentOS] Centos 5.10 Firefox 24.3.0 HTML OL

Firefox used to render

<ol type="a"> <li>.................</li>

as

a. ...............

Now it does not. The HTML 4.1 spec at http://www.w3.org/TR/html401/struct/lists.html#type-values

says use CSS instead.

These

<ol type="a"> <ol type="A"> <ol type="i">

used to work in the Centos 5 supplied Firefox. Now OL produce digits instead.

http://www.w3schools.com/tags/att_ol_type.asp states

"Differences Between HTML 4.01 and HTML5 The type attribute of the <ol> element is no longer deprecated in HTML5."

If something is "deprecated" it is supposed to work until it is withdrawn or cancelled.

Is Firefox's inability to render <ol type="a"> a bug or a very annoying irritation especially as I have hundreds of hand-coded pages using it ?

:-(