What the buttons do
These are the defaults. Every one of them can be changed in each game under Options.
Controller test
Is your controller working?
Press any button on the pad. This page reads it exactly the way the games do, so whatever shows up here is what the games will see.
Waiting for a controller. Press any button on it.
Nothing? Press a button rather than moving a stick, try a cable instead of Bluetooth, and note that Firefox reports less than Chrome, Edge, Opera or Safari do.
Sticks and triggers
Buttons
Rumble
What works
DualSense and DualShock, Xbox pads, the Switch Pro controller and most USB gamepads. Chrome, Edge, Opera and Safari support them fully; Firefox covers the basics.