Let me just say, as long as FF can read normal webpage html the same as IE, it's not a problem. But if FF cannot interpret minor html errers and render the page (as IE is able to do) we have a problem,
In other words, you were able to read the paragraph above despite the misspelled word "error" and understand the meaning. IE does that with webpages that may have a missing tag here or there. I've found FF cannot do this as well.