Useful Chrome Flags
From Verge3D Wiki
See this page to find out how to specify these flags.
Disable WebGL (both WebGL 1.0 and WebGL 2.0)
google-chrome --disable-webgl
Run Chrome with this flag to test that your app response properly to missing WebGL capabilities on the user device.
Disable WebGL 2.0
google-chrome --disable-webgl2
Specify this flag to simulate running your app on older devices with missing WebGL 2.0 support.
Disable GPU hacks
google-chrome --disable-gpu-driver-bug-workarounds