Why the webapp is slow on Linux ?

It's so bad I can't even draw things properly. The lag teleports cursor and makes a mess.
The standard paint tool works normally, but the eraser lags like hell.
Changing layer, quality, or whatever configuration changes absolutely nothing.
And so with system processus priority setting, or running browser in safe mode.

Here using Linux (Fedora 32bits) and Firefox 25.

Can't test AIR application because Adobe stopped supporting AIR on Linux platforms 2 years ago.
The package is stuck at version 2.6 and last time I did a test with pymod air-app, i did'nt event started. suppose it needs higher version.


It's a little weird 'cause I never had such problems on Flash apps, even with this linux version of Flash.


Pretty bad 'cause this app is wonderful :(