Flash is buggy on every platform, and why it is fading.
Been on one flavor or another of Linux for 15 years, help is just a quick search away.
I did lose Firefox the other night after a major system upgrade, got it fixed in a couple hours using a disc version of Linux to find the solution, badabing-badaboom, back in business with no need to speak to India or Paki help desks.
Windoze is still around for all those AOL types.
You evidently missed the part where the first time was while I was using html5 player.