Show transparency of in-page images on hover

/*
 Show transparency of in-page images on hover
 http://userstyles.org/styles/4678
 BEGIN
*/

/*
 based on
 http://userstyles.org/styles/4150
*/

@namespace
 url(http://www.w3.org/1999/xhtml);

@-moz-document url-prefix("http://"), url-prefix("https://") {
html > body:not(:first-child) img:hover
{ outline-width: 1px
; outline-color: invert
; outline-style: dotted
; background-color: #ddd
; background-image: url(data:image/gif;base64,R0lGODlhCgAKAIAAAAAAAP///yH5BAEAAAAALAAAAAAKAAoAAAIRhB2ZhxoM3GMSykqd1VltzxQAOw==);
}
}

@-moz-document domain("wikia.com") {
html > body:not(:first-child) img:hover
{ background: transparent
; background-color: transparent
; background-image: none !important;
}
}