Examine source code of Better B&G

{
  "manifest_version": 2,
  "name": "Better B&G",
  "version": "1.0.8",
  "description": "Makes BlocksAndGold website better and smarter. By Nitoxym",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.blocksandgold.com/*"
      ],
      "js": [
        "shop_items.js",
        "player_character.js"
      ]
    }
  ]
}