No weird extensions and same in safe mode. I suspect it's hw accel issues of some kind. Wouldn't've expected as it's just a PNG (they're dynamically generating

No weird extensions and same in safe mode. I suspect it's hw accel issues of some kind. Wouldn't've expected as it's just a PNG (they're dynamically generating a PNG data uri and inserting it into an IMG SRC), but I don't know how they're generating it (hidden canvas?) and the update frequency is high. Doesn't seem very optimised.