One of my Dell 21 inch monitors has a problem where it blacks out on certain pages in Firefox. After years of being annoyed at this, I finally noticed that the problem gets really bad on certain pages with Flash ads. I don’t know what exactly they’re doing that is causing a problem on the DVI bus, but it was consistently reproducible.

Once I guessed that, I hit upon an unlikely solution – install AdBlock and FilterSet G. After that, the flashing blackouts no longer appear on those pages. I doubt it’s a permanent fix, but hell, at least I can browse now without having to hunt for a close button on a strobing Firefox window.