I have long been looking for a way to detect the Speed Dial Detector from Opera, so that a special type of page is given to the Speed Dial. Through experiments, it was found that in the “Speed Dial Screenshot” mode Opera sets hard values for document.documentElement.clientHeight and document.documentElement.clientWidth to 768 and 1024, respectively, naturally if there is a body tag inside the document.
Here, in fact, the code that detects "opera speed dial mode": var sd = document.documentElement.clientHeight == 768 && document.documentElement.clientWidth == 1024 && window.opera;