Is the Shockwave Flash plugin enabled in Firefox? (In normal mode, not safe mode.)
Do you have the same problems with Google Chrome?
Good question, thankyou.
Verification check works fine in Google Chrome. "Your Flash Version 126.96.36.199" i.e. the full number displayed.
Lower down the animation runs.
Firefox stalls if Flash Player is set to always activate - I then get a unresponsive script error.
Firefox runs if Flash is set to Ask to Activate. I can activate it in the helpx test but that does not make the test work.
In either case the helpx test returns 15.0.0 and misses the 189 and the animation does not run.
In Firefox, if you choose Menu > ? > Restart with Add-Ons Disabled, do you still get the same issue with Flash Player?
Thank you pwillener for your suggestion to set my Shockwave Flash add-on for Firefox to Always Activate.
I spent time doing a reinstall and Google searching over the last few days trying to figure out why I suddenly kept getting a prompt to "Activate Adobe Flash" whenever I visited a site with a video using Adobe Flash.
Little did I know it would be related to a setting for Shockwave Flash.