Created attachment 8824692 [details]
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36
Steps to reproduce:
Version- Firefox 51.0b12
Operating System - Windows 10 Home single language 64bit
1. Launch Firefox and open the Browser Console from menu [≡] → select Developer → select Browser Console.
2. Visit about:plugins and check for the version of Shockwave flash
3. Browse the following Facebook apps that use the Flash Player plug-in and look for rendering, functional and performance issues:
House of Fun
Vegas Downtown Slots
World Series of Poker
Error is Thrown in the Browser console.
Error: Permission denied to access property "href".
There are no issues encountered and no errors thrown in the Browser Console while using these apps.
Please, don't report all errors visible in the console, many of these errors are for web devs and displayed normally by Firefox.