JS function to copy notes from essays into the title attributes of their links. Can run this straight from the console or add it as a devtools snippet.

gistfile1.js

// For instance: http://paulgraham.com/growth.html
// Copy the following into devtools console, then you should see note contents when hovering the link

[].forEach.call(document.querySelectorAll("a[href*='#f']"), function(l) {
  var to = document.querySelector('[name=' + l.href.split('#')[1] + ']');
  var text = '';
  while ((to = to.nextSibling) && to.tagName !== "A") {
    text+= to.textContent.replace(/\n/g, ' ') + '\n';
  }
  text = text.replace(/^\s*\]\s*/, '').replace(/\s*\[\s*/, '').replace(/\n{2,}/g, '\n\n');
  l.setAttribute('title', text);
});