I wonder how much success would have some subscription option (at least for small amount) like maybe $5 per year? would that be more than my data are worth? I

I wonder how much success would have some subscription option (at least for small amount) like maybe $5 per year? would that be more than my data are worth? I really like Firefox and u would like it to improve over time and as this is one of my main tools for my work I could consider to spend a little on it