Thank you! Will absolutely be donating!
I followed these steps:
installed the Mali Midgard drivers for the 3399
installed gcc g++ libpng-dev libjpeg-dev pkg-config libx11-dev libdrm-dev libgbm-dev libgbm1 libudev-dev mesa-utils xlibmesa xserver-xorg
Installed the armbian-media git using the instructions in the readme (you have a typo for the directory of gl4es/arm64)
Launched Chromium with the flags in your config file
Chrome://gpu reports:
Graphics Feature Status
Canvas: Hardware accelerated
Compositing: Software only. Hardware acceleration disabled
Multiple Raster Threads: Force enabled
Out-of-process Rasterization: Disabled
OpenGL: Enabled
Rasterization: Software only. Hardware acceleration disabled
Skia Renderer: Enabled
Video Decode: Software only. Hardware acceleration disabled
Vulkan: Disabled
WebGL: Hardware accelerated but at reduced performance
WebGL2: Hardware accelerated but at reduced performance
Any ideas how to accelerate the other GPU items: Compositing, WebGL and WebGL2?