Maybe "browser" was too specific. Replace that with an "organization" and that's Mozilla. They make firefox, but they're more than just an application, they're a group of applications developers that are pro privacy.
If Mozilla did, it probably would get the kind of attention and focus you’re suggesting. I just don’t see a lot of companies with a similar vision as Mozilla that are successful.
[0] https://blog.cloudflare.com/introducing-cloudflare-access/ [1] https://www.cloudflare.com/products/cloudflare-access/