Bug Report - Progressive Download on Firefox 46.0.1 with JW 7.4.0
there's a bug in JW 7.4.0 in connection with Firefox 46.
Progressive Download / Pseudo streaming does not start on first play click. It must be stop or seek then the video plays. Chaining back to 7.3.6 it works in Firefox as well. Seems something wrong with header reading. But URL to MP4 works fine directly as browser address in Firefox but not inside player config.
This bug in JW 7.4.0 does not apply to other browser, only Firefox. Chrome, IE, Edge or Nightly 49 works well.