As this took me some Duck Duck Going to figure out how to open Firefox Developer Edition from the command line, I felt I needed to share it here.
Hopefully it will now high rank in search engines results for the next one doing the search (it could be my future self!).
Without further ado, here it is:
open -a "Firefox Developer Edition"
Firefox Developer Edition with any other browsers name (e.g.
Brave?) and that should do, I assume.
Add the site or the file name you desire to open as the following argument and it may open it directly.
open -a "Firefox Developer Edition" http://www.duckduckgo.com open -a "Firefox Developer Edition" index.html
That's all folks! Cheers!