I tried your demo site to show you my problem with motopress.
It showed different height size in other browsers when I use Icon size are small, normal or Large (in Font Icon, Media type, setting, Service box)
If Icon size is Mini and Extra large , It’s all ok.
but only Small, Normal or Large , it shows different height size of the box.
We have checked the icon heights and found that it does not change from browser to browser. However, the text influences the height of the element that you picked. The difference is 0.5 px in Firefox and Chrome. It happens because of the preset CSS styles of each browser. You can read more about it here.
Thank you for pointing it out. We will investigate this issue further and will keep it in mind for future updates.