I've been working on studying Web GL and I spotted a recent Chrome message when the browser is mis-configured. I guess Chrome developers had a good sense of humour and when this happens a pop-up message saying "Rats! WebGL hit a snag." is displayed just below the address bar on a yellow stripe.
To see how this issue can be overcome, plus an insight into some hidden Chrome settings config, I created this brief YouTube video tutorial Rats! WebGL hit a snag, I hope it helps someone out there who is facing this issue in their browser.