While making a favicon recently, I noticed it was scaling strangely in the Firefox Awesomebar. Turns out it wasn't a square icon - it was less tall vertically than it was wide - but Firefox scaled it up in both dimensions until it was 32 pixels high for display in the Awesomebar. I played around with this a little and put together this site to showcase the fun bug. I don't expect this will be around forever, but it's a few seconds of entertainment at least.