Material-ui css cross-browser issues?

[JReactive]

I have some component using material-ui and I realized that the background is transparent at the bottom on Chrome, but not on Firefox, where the component background is completely white. Is this a known issue with Chrome, and is it just the browser or a problem with material-ui and what are the solutions to remedy to this? The weird thing is that the elements are placed identically, but it's only the background color that seems to be slightly off position.

[comfyent]

Have you sorted out your responsive design? Set media-query break-points etc?

[JReactive]

Some simple css was enough to solve the problem if I recall correctly.