For those receiving this problem "The browser could not allocate enough memory for the WebGL content. If you are the developer of this content, try allocating less memory to your WebGL build in the WebGL player settings."
Try pressing Ctrl+F5. Works for me... hope this helps.
 "Jumphobia"){kind=icon}
 "The Vault"){kind=icon}
 "A Dance of Fire and Ice"){kind=icon}