I want to use the font Fira Sans for my document, but this font has only "old-style" numbers. I was wondering if it was possible to change only the numbers' font so it would be different from the alphabetical characters.
I searched a lot but all answers I could find would only change the font in math mode using
\DeclareMathSymbol, I want this modification to affect all the document.
PS: I realize I could just use another font which has regular numbers, but I want to know (no matter the extra work) if its feasible.