Awesome work. I wanted to let you know that the erase function is not working on Firefox 3.6.19 Mac. I share the image with a Safari browser and the image there

Awesome work. I wanted to let you know that the erase function is not working on Firefox 3.6.19 Mac. I share the image with a Safari browser and the image there is erased when I erase in FF window but the erasure doesn't show up in the FF window I erased in.