Yup. The extension was creating a huge CPU load on my Mac. Started happening yesterday and tested each Chrome extension to find this was the one creating the issue.
I visited bbc.co.uk about 20 minutes ago, and started getting requests which apparently came from the BBC asking me to allow an Apple ID SSL certificate. I wonder if this is why.
Oh my that was it! I had been wondering about it and disabled plenty of extensions, but not this one. Also made me realize that I should use Firefox more often again...
Ya, the plugin causes lots of problems. It can mangle headers on XHR to sites that aren't using https. Spent a day debugging problems that turned out to just be https everywhere.