This extension verifies prefetch/preload somewhere on this page
clone or download prefetch-preload-Checker
Open a Chrome browser, and go to chrome:\extensions. (Make sure “Developer mode” in the upper right is turned on). Click Package extension program and choose the folder containing our files in the local file system(create name.crx)
Click Loading the decompressed extension program,then choose the extension program(name.crx that previous step has created)