Privacy
Personally, privacy is very important to me. Especially at this point the differences between the two browsers are significant and Chrome is a loser. However, this is also to be expected, since Google earns billions with collected data. Nevertheless, both browsers are interested in your personal data, but Firefox does not make money with it.
In general, most of the extensions mentioned in the previous section are provided at the expense of privacy and paid for with your data.
Firefox is the only browser developed by a non-profit organization. So I like Firefox's Protection from Activity Tracking feature. This stops hidden trackers of advertisements directly. I think Firefox is definitely one of the safest browsers.
Phishing and malware protection are now on board with all browsers, and additional add-ons extend the protection.
As far as protection against hacking attacks is concerned, Chrome is ahead again – Google invests a lot in this.