I was able to get these running on the latest dev-channel Google Chrome on Mac (or regular Chrome Windows) with the Personalized Web extension (which lets you inject HTML, CSS, and JS, the latter two being the important ones): <a href="https://chrome.google.com/extensions/detail/plcnnpdmhobdfbponjpedobekiogmbco" rel="nofollow">https://chrome.google.com/extensions/detail/plcnnpdmhobdfbpo...</a>