Examine source code of BGA Helper

{
  "manifest_version": 2,
  "name": "BGA Helper",
  "version": "1.1",
  "description": "A collection of helpful plugins for Board Game Arena (BGA)",
  "icons": {
    "48": "icons/BGA_Helper_Icon_48x48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.boardgamearena.com/*/catan?*"
      ],
      "js": [
        "catan.js"
      ]
    },
    {
      "matches": [
        "*://*.google.com/"
      ],
      "js": [
        "catan.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/BGA_Helper_Icon_16x16.png",
      "32": "icons/BGA_Helper_Icon_32x32.png"
    },
    "default_title": "BGA Helper",
    "default_popup": "/main.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{69cf1dd9-1c8e-4a6a-8709-eeaa7f2644d5}"
    }
  }
}