It's a little depressing, but the essential problem isn't that the filtering is on by default, it's that you can't turn it off at all. According to the last thing said on that page, they intend to fix it so that users can state a preference... if i'm reading this right. So it's not really what we want, but it'll do the job. The fact is that most firefox users aren't pixel artists, and don't care, and this'll fix it so that the people who do care can get on. I don't mean to say that we should stop complaining, of course. But it's not a bad idea to let this bug go through the way it's going through.