Mark 'moz-opaque' deprecated (#17343)
Mark 'moz-opaque' deprecated (#17343)

refer https://developer.mozilla.org/en-US/docs/Web/HTML/Element/canvas#attr-moz-opaque
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data