Can't get past level 2 with Firefox 78 ESR. "Select all the squares with a Stop Sign", but no squares for selecting show up, so there's nothing to select. Unless I miss a joke somewhere in there?

It took me a bit to figure out that squares stop subdividing at some point (I first thought I had to subdivide into biggest-possible squares, but no selection possible that way) — once at smallest subdivision, just select all the squares covering the stop sign.

I did hit an issue in FF on level 17 (draw a circle): mouse-down triggers a "too closely resembles a dot" and I can't draw a circle on a laptop.

So the squares turn into smaller squares when you click them? If so, keep subdividing… if not it’s a bug?