I am developing a web in Bootstrap 4 and in the header I have a SVG format logo that has to be responsive (without fixed size) but it is not possible to visualize it unless you leave the property wide at a fixed value in .px some way to be responsive without leaving a fixed value in .px? Because in Chrome, Opera, Safari, Internet explorer leaving the Width property in auto. In all browsers it appears without problem but in Firefox it does not
An SVG element would be better than an img tag. You’ll need to have your viewBox attribute as well as width and height. This will ensure it scales appropriately.