Thanks for the response Dan... I have tried to disable my Firefox add-ons (Ad-Block plus, Fireform, Ghostery), but to no help with the issue. I am not using any added themes, just (Default 4.0) appearance. I have also tried to re-install flash.
For steps, I use my hotkey for active window capture, but whatever the last viewed flash content displayed was, shows up in the resulting screencap edit(shup image editor) window. Sometimes it will be a mix of different flash content (for example: youtube + weatherspark)
In this Example, I went to youtube watched a video, then came back this this forum, and tried to capture the screen.
https://stash.reaper.fm/oldsb/1102351/11131814579.jpg