I have been using 8.5 for a few days now. Not everything works well and I have come to this conclusion. The FF team complained for years and years that MS wasn't following standards and that is why a ton of pages did not work with FF. Well, the FF team finally smartened up. No one cares. The user cares if it works and if it does not, they have no reason to leave IE. So the FF team started ripping off IE in every way possible and now most stuff works with FF. Opera is facing this exact issue right now.