[ubuntu_studio] Flash Player issues in Firefox

Hi, I am ruing Firefox 45.0, adobe-flashplugin 1:20160310.1-0ubuntu0.14.04.1 under Ubuntu Studio 14.04. I have no issues playing flash videos but if I click the full screen button while the video is playing, it takes literally 3-4 seconds to get to full screen. During this period I get the audio playing but the screen is black. Same process happens when minimizing the screen. No problems with Chromium which responds instantaneously.

Appreciate if anyone has any suggestions to fix this issue.

Thanks