Comment 6 for bug 1450622

Over a year later. Make it two reported with the issue for this bug report.
I'm having the same issue with Pipelight.

Distro:
Linux HTPC 3.16.0-73-generic #95~14.04.1-Ubuntu SMP Thu Jun 9 08:00:04 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
FireFox:v 47.0 Mozilla Firefox for Ubuntu Canonical -1.0

The output of about:plugins
Pipelight Error (flash)!

I have been through uninstalling Adobe Flash and various other steps to get Widevine and Silverlight working, well at least running in the Add-Ons. Also I have a plug in called User Agent Overrider to fake HBOGo to think I am running Firefox in windows.
All this mess is due to a DRM issue with HBOgo showing a black screen.
I am going to reinstall Adobe Flash for Linux again for now for other video streaming.
Hopefully we can get this issue fixed.

Thanks