The feature I most want in a browser is for them to enable client side ssl certificates for password free signin. The UI is actually quite trivial to implement and it would turn the entire internet into a single social network, sidestepping the awfulness [1] of existing solutions like openid-connect. [1] It's awful because it gives a company's entire customer list to google, facebook, etc. That used to be called goodwill and it is/was the lifeblood of bricks and mortar companies.