BM [Clear Cookies]

javascript: var numCookies = 0;
var cookieArray = document.cookie.split("; ");
for (var i = 0; i < cookieArray.length && cookieArray[i]; i++) {
  numCookies++;
  for (var subDomain = "." + location.host; subDomain; subDomain = subDomain.replace(/^(?:%5C.|[^%5C.]+)/, "")) {
    for (var curPath = location.pathname; curPath; curPath = curPath.replace(/.$/, "")) {
      document.cookie = (cookieArray[i] + "; domain=" + subDomain + "; path=" + curPath + "; expires=" + new Date((new Date()).getTime() - 1e11).toGMTString());
    }
  }
}
alert("All data, including" + numCookies + " cookies cleared. Click OK to reload page :)");
window.location.href = "http://" + window.location.host + window.location.pathname;
(function() {
  localStorage.clear();
  var c = document.cookie.split("; ");
  for (i in c) {
    document.cookie = /^[^=]+/.exec(c[i])[0] + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT";
  };
})();