Different aspects on different browsers

Looking at this page https://www.pideja.ca/about/ I notice that it does not display quite the same from browser to browser.
My preference is Chrome. So, I build the site on it. The only other browser displaying the page, in the same manner, is Brave.
Safari, Opera, Firefox and Firefox developer edition show the text with smaller top padding.
As for Edge, it’s a disaster! Type is too big and formating is everywhere.

Why is this?

I don’t know. It looks the same to me on Chrome, Edge, Firefox, and Opera. Caching issues?

I just installed Brave and the page looks the same there too.