over at https://canvas.toast.ooo there's a weekend event for Lemmy users. It's similar to r/place, each user can place one pixel every 30 seconds. Come help add our logo!
Template: https://i.imgur.com/evRnFGN.png at location (259, 786). You can add the template for yourself by clicking the gear in the top right.
It should work. I have it working on fennec, which is a fork of Firefox. How exactly is it not working?