Later: Answer: Yes. https://twitter.com/jeremiahg/status/392335814048247808
It seems like closed-source is antithesis to "designed for the every day person who really values their online security and privacy."
So "the job" here involving making a browser not do things, which you can't see. How often pray tell do you pay somebody to perform a job you can't verify the outcome of, but take him by his word that he did it?