If pipelight is giving you problems, take a look at this page. It worked for me.
http://www.webupd8.org/2013/08/pipeligh ... linux.html
This part did the trick:
- for your user only:
pipelight-plugin --enable flash
I hope this post isn't considered unnecessary but I had heck with pipelight for several days, especially the switcher, which I don't need now.