Just one person's opinion, but the average customer doesn't make decisions based-on security or privacy. Nor do they care about participation in a walled garden

Just one person's opinion, but the average customer doesn't make decisions based-on security or privacy. Nor do they care about participation in a walled garden. So, what's left? Brand affinity. Browsers may just be a relatively transparent means to an end, especially in the app world. The differences between them are small, to the average consumer, and I'm guessing whatever is solved by moving them to the browser is trumped by the existing state, syndicating the credentials you already have with the companies you trust, saving credentials to the browser and easy to remember (insecure) passwords. https://en.wikipedia.org/wiki/Mozilla_Persona https://en.wikipedia.org/wiki/Mozilla_Persona was great. But, what customer problem are you trying to solve?