I have been following these instructions to build myself a copy of Firefox:
I have successfully built copies of Nightly, Beta and (fingers crossed - it is running now!) Release, but I am struggling to build a copy of Developer Edition.
I tried _hg clone https://hg.mozilla.org/releases/mozilla-aurora/ aurora which did bring down the files, but ./mach build failed with a python error (not recorded (sorry), but also not experienced with other versions) which makes me think it is bringing down the old Aurora code that is not compatible with the last bootstrap.py.
I could build a copy of Beta and change the update channel to Aurora, but that would not get the correct branding and theme.
How do I build a copy of Firefox Developer Edition?