Given that Firefox Developer Edition uses a separate profile by default, is it supposed to be used as a developer's main browser? Or is it supposed to be used ONLY as a separate testing browser on which a developer works, just like if it was another text editor or IDE? If so, wouldn't Mozilla be losing a lot of testing potential, since the Aurora/Developer Edition is not being tested in the "real world"?

Wasn't this whole Developer Edition thing just a way to get more people to use the Aurora channel? I remember that people used to say that they had enough testers on Nightly and Beta, but they were lacking Aurora users. So was that the main motivation? I mean, even the official website hides the Beta version away these days but it has some ways of getting to Developer Edition page, while you can only get to Beta by "Googling". Are they trying to push way users (mainly developers) away from Beta into the Developer Edition so that they have more people testing that version, because Beta already has enough users?