- Using position: sticky broke the 3D effect in Firefox.
- Firefox and Safari ignored interactive elements that are move back a little within a parent element, even if that parent is move forward quite a lot.
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Safari didn't render perfect right angles. Most of my (pseudo)element I needed to create block/cube/box faces have rotate values of e.g. 90.01deg instead of round 90deg. Otherwise they would be invisible.
- Safari had issues with display:contents and 3D effects. I tried to use the details + summary combination more but nothing in there would keep the 3D effect. Additionally, both Safari and Firefox didn't let me change the display value of the details element.
- A million small cases were Firefox rendered supported properties visually different than Chrome and Safari.