This will search the page for `https\://` and strip the `\` character from image src attributes.

fixQMImages.js

(function() {
  var imgElements = document.getElementsByTagName('img');
  for (var i = 0; i < imgElements.length; i++) {
    var src = imgElements[i].getAttribute('src');
    var modifiedSrc = src.replace(/https\\:/g, 'https:');
    imgElements[i].setAttribute('src', modifiedSrc);
  }
  console.log('Image URLs fixed!');
})();