I have created a script to disable protected mode in Adobe flash player after it is installed. I see a lot of this being done for various reasons. If anyone is interested in it, as it is a quick and easy way to do so, you dont have to go fooling with OS files.
You can read about it below
http://firefoxcrash.blogspot.com/2013/12/adobe-flash-player-enabled-wi th-script.html
Best Regards