There is a Gnome Shell extension that works with Wayland: https://fedoramagazine.org/safe-eyes-redshift/

This protocol can provide an alternative to the web of trust. The verification method of web of trust can't be easily automated, this protocol can. For example with this protocol an email client can lookup the matching PGP-key for an email address. This could make everyday use easier, but people will have to setup PGP, generate keys and then publish them. In my opinion this is still too difficult for the average user.

I agree, but there aren't a lot of websites that implemented DANE or even DNSSEC. You can install this add-on to validate the records: https://addons.mozilla.org/nl/firefox/addon/dnssec-validator...

It's chicken and egg though. If browsers started supporting it more sites would start using it and vice versa.