We run farms of puppeteer and headless Firefox. Not retail, but it's a complex app (that is also available in Electron); things like video plays have trappable

We run farms of puppeteer and headless Firefox. Not retail, but it's a complex app (that is also available in Electron); things like video plays have trappable events to hook into. For example, hit play -> time how long until video starts playing -> hit pause at 00:19 (random example time), take a screenshot of the #video-container element DOM, and do a comparison to a known-good screenshot. It's not overly non-traditional, but still much more than forms and buttons. Other things include typing into an autocompleting search box, and having middleware capture /autocomplete.json?q=* type of requests and comparing them to see whether they are coming up OK, what queries are coming up, and then dumping the DOM of .autocomplete-search-results-container or similar and iterating them through to turn it into an array again, and ensure sorting order matches.