"A browser for the people" should:
(1) build in safety features such as adblock, noscript, https everywhere, request policy; and allow extensions to modify and enhance these behaviors for specific needs;
(2) not hide important information (such as the URL ) from users;
(3) allow extensions and derivatives to modify the interface and behavior of the browser; and
(4) perform security checks of add-ons / extensions at install / upgrade time and startup time; disabling add-ons in the middle of a browsing session because a certificate expired is madness.

Oh, there's more, such as render HTML, but this would set ABFTP apart from all of the major competitors immediately.