Examine source code of Chess.com Scroller

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Chess.com Scroller",
  "content_scripts": [
    {
      "matches": [
        "https://www.chess.com/game/live/*"
      ],
      "js": [
        "live.js"
      ]
    },
    {
      "matches": [
        "https://www.chess.com/analysis/game/live/*"
      ],
      "js": [
        "analysis.js"
      ]
    },
    {
      "matches": [
        "https://www.chess.com/computer-chess-championship*"
      ],
      "js": [
        "ccc.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{abb13645-93f1-4ca1-9910-32e4d2e49246}"
    }
  }
}