I have used both for many years, and now, I see little difference in practice. I am leaning more towards Firefox these days. Main change is that I now use Firefox as my main mobile browser for ad blocking reasons. A few websites don't work on Firefox, I use Chrome for these few.

I don't consider it a problem to use two browsers at the same time, I usually don't to the same thing with them, so having separate profiles can be an advantage.

Note that privacy is not the reason why I am using Firefox. It is just that I think that knowing both is a good thing, and they are both good browsers, so why not? In some case, Firefox is better, in others Chrome is better, most of the times, they are interchangeable.