The follow script is intended as a browser bookmark and will replace all  markdown in a github PR with the HTML <img src=...> versions instead. This is helpful when setting up big tables of images

Github PR image markdown unwrapping.js

;(() => {
  const el = document.querySelector('[name="pull_request[body]"]');
  const markdownImageRegex = /!\[.*?\]\((.*?)\)/gm;

  window.__PREVIOUS_PR_CONTENT = el.value;
    
  const newVal = el.value.replaceAll(markdownImageRegex, (match, url) => `<img width="450" src="${url}">`);
  el.value = newVal;

  alert("Replacements complete. Preview content available in window.__PREVIOUS_PR_CONTENT");
})();