use jQuery in Chrome javascript console.

load-jQuery.js

var jq = document.createElement('script');
jq.src = "//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js";
document.getElementsByTagName('head')[0].appendChild(jq);
jQuery.noConflict();

withChebo.js

console.log($); // $ is object original site object

withChebo(function() {
  console.log($); // $ is imported jQuery
})

console.log($); // $ is object original site object