Comment 34 for bug 1775170

It looks like you can use -v3:
  -v {0,1,2,3}, --verbosity {0,1,2,3}
                        Verbosity level; 0=minimal output, 1=normal output,
                        2=verbose output, 3=very verbose output

You mentioned 95f4db675ac3.js had an error. You might compare good vs bad versions of that file and maybe that'll help narrow things down.