So I take that as a NO - there is no trace tool available - which won't be pulled in probably 18 or 20 hours when Firefox ratchets up to version 42. I still cannot see any valid reasons that it blew through so many version numbers in such a short time.
As I was saying - I will take that as "No, there is no available, viable, trace tool."
What a sad comment on the state of software development in the PC world and the lack of tools which we obsolete, old decrepit and useless mainframe programmers have come to expect since the 1980s.
Oh, yes - does anyone know if there is an execution trace program, add-on, whatever, for any of the other browsers?