You can “find” the OpenGL with this command from terminal:
glxinfo | grep "OpenGL version"
You tagged KDE and you talk about Gnome extensions that only work on Gnome, yet you definitely are talking about KDE Plasma Compositor Settings.
The burn my window effect was ported to KDE Plasma indeed, but is not there yet in spite the comments on the store page Incinerate [Burn-My-Windows] - KDE Store
There is nothing for KDE in that regard. If you want to use that extension, you need to install Gnome. Please don’t mix DEs as you will get in more trouble …
So, not the typical X Y Problem but x y z problem …
Create a TEST user, so we know there is nothing altered in their configs, and see if is all fine there. If it is, then definitely some of your tweaks lead you to some funkiness …
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