It's probably a free-tier heroku app, being hugged to death right now. I've used this site quite a bit in the past on FireFox, Chrome, and Brave, and it has worked perfectly before.
Thank you. Like you said, I use Firefox for development and test it on Chrome as well.
The target users of Sketch.sh is web developers so I received bug reports about browser incompatibility almost instantly.
It was a problem with now.sh version 1 platform. I can't find a way to scale the free v1 node. All their docs prefer to upgrading to version 2 platform.
