I've got the following problem:
I'm developing an website, so while I was testing around I've noticed that firefox and chromium display an css bar in different colors. When I switched between several machine I could come to the conclusion that firefox for ubuntu is the problem. On all other devices I've tested the website. It's perfectly fine.
The differences between chrome and firefox rendering:
Firefox:
Chromium:
NOTE: Firefox for ubuntu is certainly the problem.
Does someone knows why this is and came up with a solution?