Sections Slip

Hi

The website home page often appears differently in different browsers. If I am using elementor, is there any way to prevent the vertical space that I give between two sections appearing differently in different browsers? If for instance the spacing appears perfect in Chrome but in Mozilla the bottom section overlaps the upper section thereby destroying the appearance. I thought that if I use a section and then inner sections within that section then the problem will be solved. However, I see that it is possible to stretch the lower inner section to overlap the upper inner section. Perhaps sometimes designing requires overlapping for aesthetics but a locking mechanism is also needed.

Thanks