This may help you understand the difference of each browser:
For Chrome you can troubleshoot with google site here:
For Firefox you should check this page:
Thank you for your suggestions Hitomi, but I have tried all the obvious suggestions (removing and reinstalling Flash from each browser multiple times).
Frankly I don't believe Oswald was the only shooter in the Kennedy Assassination, so I must simple be open to conspiracy theories, but when Adobe Flash suddenly stops working in my 2 favorite browsers all in the same week, yet works swimmingly well in my least favorite browser I suppose I get suspicious.
For now IE9 is back to being my default browser as much as I am disappointed in that fact. But at least websites utilizing flash technology work in that browser.
I did uninstall Firefox and update Waterfox and reinstalled Adobe Flash.
It appears to be working.
Thank you. I will now work on Chrome.
Whoops, I was wrong. It popped up as working in IE9 which I mistook for Firefox. Still not working in Chrome/Firefox/Waterfox.
Apparently Adobe Flash is no longer compatible with browsers other than Microsoft so if I want to use it I must always use IE9.