What feature of Firefox Developer Edition?

As I understand it, all the features of Firefox Developer Edition, described here, moved into the main release, and now the only features that remained there is a beta channel, optional digital signature verification extension and a separate profile?
Or else there's something separately that is not in the main thread?
June 10th 19 at 16:13
1 answer
June 10th 19 at 16:15
He's black and he's for developers

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