Earlier quoted context omitted.
> "Third, we’d rather not engage in an arms-race with US government agencies." > Read: we are afraid to lead here, because backlash from the government (and the public?) could be too damaging for Mozilla. I read "This is a race we'll probably not win and even if we do, we'd have a lot of power tied up there. But we can win by just changing the rules, so let's do that."
The US has been changing the rules since decades. The shadow government has adapted to those changes, becoming more and more powerful with each change. The US will pass a couple of "government openness" laws in the coming months (years?). The shadow government will laugh at that, move operation proceedings to the new release, and increase the broadness of surveillance, thanks to improvements in technology. The only w…
Thus, the stated goal of persona is to remove the need for a centralized auth provider - thus sidestepping the problem of where those centralized servers are located. That's why they don't want to engage in a whack-a-mole game with the US government.