How can I add smileys with Yahoo e-mail when running Firefox

When I run IE (version 6.0) and compose Yahoo e-mail, I can add smileys and change the text color, the type of font, the size of the font, and lot of other things. But when I run Mozilla Firefox (version 1.0.2), I can’t figure out how to do this.

Does anyone know how to compose Yahoo e-mail when running Firefox, with the smileys and where you can change the type of font, the size of the font, the text color, etc.?

(It’s not because I forgot to change my preferences with Yahoo. I already tried choosing “Mail Options” -> “General Preferences” -> “Composing E-mail” -> “Compose messages as color and graphics”. But this only works with IE, not with Firefox.)

For users of Internet Explorer 5.5 and higher: Compose your messages with Color and Graphics

It looks like it just doesn’t work in Firefox (I tried too).