Here’s a great and beginner-friendly article on the topic of secure (and private) messaging and why Matrix currently doesn’t fit there: https://proton.me/blog/whatsapp-alternatives

Vivaldi (or Mozart… whatever) is a joke regarding privacy. IMHO it’s not as bad as Opera, Chrome, Edge, but still not good enough. For some privacy, you should always use a VPN service + Hardened Firefox / Brave / LibreWolf.

🎯💯

Matrix is a security nightmare. Everyone should stay clear from it till possible solutions are found for the ongoing concerns.