When "view background image" is greyed out, this add-on is there to help you. behind! can reveal: - Background images, - Images under layers of nonsense (e.g. clickable surfaces designed to hide the image from you), - Embedded images / base64-encoded image chunks, - Alternative resolutions , - Vector images (even when they are inlined), - Images in shadow DOM Source code: https://github.com/kubuzetto/behind