On Firefox the List Item With Icon, Text and Note Are Not aligned

I’ve noticed recently that there is an issue that appears on Mozilla Firefox with the text of a list icons with an item note. The problem is that the text and the item note are not aligned.

Is this intentional?

It seems like the text for the list icon should be aligned vertically in the middle as well as the note. The text is at the top and the note is closer to the bottom. It even appears to be that way on the CSS components page when viewed from Mozilla Firefox.

I have noticed it as well, on buttons…

I am seeing it on Firefox 32 on Mac OS X and not the other browsers.