Flash-Games became very slow after the last 28.9 Releases

[VevendoVides]

Since weeks i am playing this Online-game with 90 levels when i'm bored:

Street Art
https://www.spielesite.com/play/8800.html

Since updating PM to the 28.9.0.n. Release this Flash-Game slows extremly down after a while. I haven't had this Issue before, even if several Tabs were opened, what I now should better close since the Jump from 28.8 in the last release. And even the single Tab-Mode isn't helpfull. Clearing the Cache was not helpfull as welll - It only kills the Score and Progress.

I am not sure, wether it is right here in the forum or maybe does belong to a the similar Thread nearby in this Sub. In Case of that, please feel free to combine both or move my Report/Question.

Thanks in Advance for any Ideas or Workarounds.

[VevendoVides]

Discussion is continuing here: viewtopic.php?f=3&t=24187