Examine source code of PoE Impact Trading

{
  "manifest_version": 2,
  "name": "PoE Impact Trading",
  "version": "0.5",
  "description": "A web extension for Path Of Exile players, that shows you the impact an item listed on pathofexile.com/trade has on your character.",
  "icons": {
    "16": "img/icon-16.png",
    "32": "img/icon-32.png",
    "128": "img/icon-128.png",
    "335": "img/icon-335.png"
  },
  "browser_action": {
    "default_icon": {
      "38": "img/icon-38.png",
      "128": "img/icon-128.png",
      "335": "img/icon-335.png"
    },
    "default_title": "PoE Impact Trading"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.pathofexile.com/trade/*"
      ],
      "css": [
        "css/style.css",
        "css/trade.css"
      ],
      "js": [
        "js/trade.js"
      ]
    },
    {
      "matches": [
        "https://pob.party/*"
      ],
      "js": [
        "js/pob.js"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "js/trade-injected.js",
    "js/pob-injected.js",
    "img/icon-40.png",
    "img/error-40.png"
  ],
  "permissions": [
    "storage"
  ]
}