Display problem Logo SVG with Bootstrap

I put this question in the Mozilla forum but I have not had an answer to see if you help me here

I am developing a web in Bootstrap 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 width at a fixed value in .px Is there any how to be responsive without leaving a fixed value in .px? Because in Chrome, Opera, Safari, Internet explorer leaving the Width property in auto