I went straight back to chrome. At least I don't get such warnings so they seem fine.
Jk of course.!
I'll keep using the "browser" browser MIUI packaged for me, it goes well with the MIUI password vault.
Got ya again!
But still, I'm a bit concerned the general public might just throw their hands in the air and move towards less known browsers but that are well marketed that are worse than Firefox (opera, brave...) because of this.