A CSS property of background-attachment: fixed allows you create a cool effect of a scrolling window over content. This way you can cr… | Css, Instagram, Background
Fixed Background Scrolling Layout | Codrops
XF 2.1 - how to fix background image in the mobile | XenForo community
GitHub - thesved/fixed-cover-background: Fixed cover sized background image with CSS which works on iOS and other mobile devices
The Fixed Background Attachment Hack | CSS-Tricks - CSS-Tricks