Thanks for the suggestion. The potential problem with that is that it forces me to always use the same IP for https://nicenames.org because a lot of domains will be tied to that IP. I could use a CNAME, of course, but that's actually more complicated for the average user to set up than a straight forward (particularly because if you want to set up a CNAME for the naked domain (example.com), the way you do that differs from DNS provider to DNS provider (some places the feature is called ANAME, and some places it's called something different), and some don't offer that functionality at all.
Compared to that, forwards are very straight-forward (no pun intended) and are offered by virtually all registrars.
Most of the code people have written in Vue 2 is compatible with Vue 3. Vue 3 has just added some additional features. Sure, there are breaking changes, but not to an alarming degree.
Not seeing it. Is it possible you're referring to Firefox and not Firefox Focus? Or maybe the Android version of Firefox Focus has that feature and the iOS version doesn't?