Why do browser downloads stop until I move the mouse?

14 Jul 2011
14 Jul 2011 | |

I’ve noticed sometimes with Firefox that occasionally my mouse will start behaving odd, where any download will pause unless I move the mouse. The download progress literally stops, until I move the mouse around and the file (or web page) will continue to download. It’s the oddest thing I’ve ever seen. Does anyone have any idea why this happens?