zgma:
I guess you can do a little bit fancy stuff in Mozilla but you need to know some tricks:
1. If you want to write in bold write this:
<b
>this is bold text</b>
2. If you want to write in italic write this:
<i
>this is italic text</i>
3. If you want to write in underline write this:
<u
>this is underlined text</u>
This is a little bit of HTML, but this is the only way to do in browsers which can not work with this fancy rich text editor, I think.
I am writing it from Firefox which is actually a Mozilla browser:
http://www.mozilla.org/products/firefox/