Earlier quoted context omitted.
And that's OK; if it wasn't for Apple then Google would essentially own the current and future direction of the web by now
with their sandbagged browser that they only bother to update once a year? Firefox is the competition for Chrome, Safari is just a sandbag to hold open the gap between web apps and native apps.
Apple added YubiKey support (https://nakedsecurity.sophos.com/2019/12/12/apple-ios-13-3-i...) for 2FA in Safari in 13.3 and they added better mouse support to Safari as well as other built in apps between major releases.
Firefox is losing market share and almost completely dependent on Google for its survival. If Firefox tries not to support something that the rest of the industry is supporting (like the web based DRM) the rest of the industry just yawns.