I like how the page title changes to "Deploying 🚀" when a deployment is in progress, it's very handy for knowing when a deployment is complete, without having to open the tab.
However, I often have a lot of tabs open so the page title isn't visible. It would be ace if it could change the favicon to signal an active deployment. Perhaps even to an emoji? css-tricks.com/emojis-as-favicons/
It would extra cool would be if it could briefly change to a different emoji/icon to indicate a successful/failed deployment. 😀