material-components_material-web/list/test/window_size.json

{
  "capabilities": {
    "goog:chromeOptions": {
      "args": [
        "--window-position=0,0",
        "--window-size=1920,1200"
      ]
    }
  },
  "extension": {
    "xvfbResolution": "1920x1200x24"
  }
}