Firefox makes this color ugly

On Chrome & Ubuntu 20.04, left side is #FEFA51, right side is #FEFA53

On Firefox & Ubuntu 20.04, left side is #FEFA00, right side is #FEF952

Chrome and Firefox must be rendering in different colorspaces (I'd expect one is assuming sRGB, and the other is not doing any conversion).

I can't believe it took 10 years for Chrome to fix orientation: https://bugs.chromium.org/p/chromium/issues/detail?id=56845

I'm looking at your screenshot on both chromium and firefox, and I can't see a difference in color between the two sides of your picture. I can't see the difference when visiting the website directly either.

Checking the color code with the eyedropper of gcolor2, I see the site is #FCFC04 when checking it directly on both browsers, and in your picture, the right one is #FCFC07, while the left one is #FCFD00.

They all look the same to me though. It's not distinguishable to my eye.