Pic Style - Checkerboard Mod

.picstyle_body {
    background-image: url(chrome://global/skin/media/imagedoc-darknoise.png) !important;
}

.picstyle_img {
    background-image: url(http://i.imgur.com/iev5QYZ.png) !important;
    /* darknoise.png, with black erased */
    background-color: black !important;
    border: none !important;
    box-shadow: 0 0 15px black !important;
    transition: background-color .5s, box-shadow .3s !important;
}

.picstyle_img:hover {
    background-color: -moz-Dialog !important;
    /* should be a light color */
    box-shadow: 0 0 15px white !important;
    transition: background-color .3s, box-shadow .5s !important;
}

/*
https://addons.mozilla.org/en-US/firefox/addon/pic-style-checkerboard/
http://gfycat.com/GrippingImpassionedAustralianfreshwatercrocodile
*/