Examine source code of Brick Hill Trade

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Brick Hill Trade",
  "description": "Trade better.",
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "version": "4.8.1.5",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "notifications",
    "background"
  ],
  "background": {
    "scripts": [
      "notify.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.brick-hill.com/shop/*"
      ],
      "js": [
        "shop.js"
      ]
    },
    {
      "matches": [
        "https://www.brick-hill.com/*"
      ],
      "js": [
        "user.js"
      ]
    },
    {
      "matches": [
        "https://www.brick-hill.com/trades/*"
      ],
      "js": [
        "trades.js"
      ]
    },
    {
      "matches": [
        "https://www.brick-hill.com/trades"
      ],
      "js": [
        "trades.js"
      ]
    },
    {
      "matches": [
        "https://www.brick-hill.com/trade/create/*"
      ],
      "js": [
        "create.js"
      ]
    },
    {
      "matches": [
        "https://www.brick-hill.com/forum/3/create/"
      ],
      "js": [
        "ask.js"
      ]
    },
    {
      "matches": [
        "https://www.brickplanet.com/*"
      ],
      "js": [
        "brickplanet.js"
      ]
    }
  ]
}