Firefox Developer Edition won't update itself.
Since the start of this May, I haven't been receiving Firefox Developer Edition OTA update. I can only update Firefox by downloading the disk image.
- Shockwave Flash 25.0 r0
- User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0
The DE version has been discontinued and you need to use the beta version to be able to receive updates. See: