17 points
*
7 points
2 points
It’s all fun and games till they check for web USB support. They don’t need to actually use web USB but it’s a telltale sign that you’re not on Chrome.
4 points
A plugin could very easily have Firefox claim to support WebUSB, but return no devices or junk devices. Some of the anti-fingerprinting add-ons already do, iirc.