@hostia @tomasino @Tutanota That's how I have the browsers set up. Cookies gone right after closure, all opt-in privacy features on, a good (non Proton) VPN with open source clients to handle the connection, no Google as search engine and no Chrome either. Sure... you need to believe me, an anonymous user, in my experience. But you also need to believe Proton, because they offer exactly zero guarantee of not leaking your data, save for their word.
In general, I don't trust the large VPNs... because there's always the risk that they've been making cash in other ways than providing a tunnel.