It works for me. see screenshot The second screenshot, I'm running it while in my home directory using the same path you posted.

You should be able to run trace and see what happens. Trace on mac is new for me, but let's play with it and see what happens. trace -t [-o outfile] I assume it should be something like trace -t -o firefox_outfile /Applications/Firefox.app/Contents/MacOS/firefox-bin

Let's test...

Nope.... crashed and burned.  ;-)

Found this in a search. https://blog.kandji.io/mac-logging-and-the-log-command-a-guide-for-apple-admins log show --last 1m

No browser issue right, just trying to run from cmd line? Came across this. https://www.youtube.com/watch?v=3fhqFgdbIQE https://superuser.com/questions/277565/start-firefox-from-terminal-on-mac-os-x

Browser is working when started from the Dock, yes. I've even found a workaround to start secondary profile through http://about:profiles

So all is well?

The trick with `open` helps. Thanks a lot

No problem. If no further questions, please mark this issue as resolved to get it off our list of things to do. Have a nice day.