I've got a very simple setup on my Raspberry pi 2. It's a clean install of the latest version of Raspbian (via NOOBS) with Redshift and QuickSynergy installed. Almost any time I open a web browser, whether it's Midori, Epiphany, or Chromium, the screen fills with one single color (usually gray, though sometimes others - I got a pale red once) and the system is unresponsive. I've tried leaving it for over an hour and nothing seems to fix it. Once or twice instead of filling with a color the monitor has simply disconnected.

I've tried formatting my SD and reinstalling the OS several times now. I'd describe more about my setup but honestly this even happened once right after I'd finished a fresh install of the OS. The RPi has a Trendnet wifi dongle that's worked fine for years until this cropped up about a month ago. Any ideas?

EDIT: Odd thing: I tried Firefox ESR and it seemed to not have the issue (though it ran quite slowly). But after about a week of use, it did the same thing once when I started it. This doesn't appear to be a consistent behavior and I'm having a tough time reproducing it, but it seems to happen more often if I load the Any.do web app (http://web.any.do).