Center Image

chrome-center-image.user.js

// ==UserScript==
// @name           Center Image
// @namespace      https://gist.github.com/justdanpo
// @version        0.2
// @description    Open images centered
// @author         den_po
// @match          http://*/*
// @match          https://*/*
// @match          file://*
// @run-at         document-end
// @grant          none
// ==/UserScript==

(function() {

    if ((1 === document.body.childNodes.length) &&
        ("IMG" === document.body.childNodes[0].nodeName) &&
        (document.body.childNodes[0].src == document.URL)
    ) {
        document.body.style.display = "-webkit-box";
        document.body.style.textAlign = "-webkit-center";
        document.body.style.webkitBoxAlign = "center";
    }

})();