Firefox, UBO, CanvasBlocker. I entered my address, put one pizza in the cart, navigated the upsell and contribution ordeals and made it to checkout. Page loaded

Firefox, UBO, CanvasBlocker. I entered my address, put one pizza in the cart, navigated the upsell and contribution ordeals and made it to checkout. Page loaded fine and it looked like I could check out. It's not that I never see what you're describing - I do all the time. I didn't get it here tho.