Short sighted and terrible PR, yes, but to say that what Firefox was doing was shady, specially anything close to as shady as Brave, is being straight out disingenuous.
I was pretty clear about my stance on Brave in the first three words of my comment, but I'm skeptical of any interpretation of user privacy which is so eager to excuse sending user browsing history without asking as not "shady" but simply "short sighted and bad PR" just because Mozilla's the one doing it