chrome.webRequest.onBeforeRequest.addListener(
    function(details) {
        switch (details.url) {
            case "https://vtop.vit.ac.in/student/images/round_orange.gif":
                return {redirectUrl: "https://res.cloudinary.com/dadfowug4/image/upload/v1479314802/nAnJHcz_kt2did.png" };