Adaptive border radius not working in Firefox

[dougmacknz]

See forked example with more exaggerated border radius: https://codesandbox.io/s/hidden-cloud-o8vrl

Working fine in Chrome and Safari:

[faultyserver]

Interesting! It looks like Firefox doesn't return borderRadius in at all the same way that webkit browsers do:

Firefox:

Chrome:

I'm not sure why Firefox isn't populating the regular borderRadius property, but that is what we rely on to calculate the adaptive border radius, so that's why it's not adapting there at least.

Since the inividual corner values are populated, maybe we can do something with that and build up the value from the corners to be more flexible?

[mrkldshv]

From what I've found, Firefox does not support getting computed styles of shorthand properties, which border-radius is. There is bug reported here. I can work on adding individual values for each corner.