-moz-fixed and the universal selector

You don't seem to be able to override, using the 'inherit' keyword, the font of elements which have been styled with the -moz-fixed font in html.css.

This paragraph contains a piece of emphasised text and a piece of code. They should both have the same font as the parent paragraph, exactly. (They are also both blue.)

However, while the emphasised text does indeed lose its default italic, the piece of code does not lose its font.

FYI, the page contains this stylesheet:

       em, code, pre { font: inherit; color: blue; background: white; }
    

Note how the above pre element does not lose its font either.