Examine source code of CryptoCurrency Checker

{
  "name": "__MSG_appName__",
  "version": "0.0.3resigned1",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "icons/icon-16.png",
    "128": "icons/icon-128.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "tabs",
    "storage",
    "http://*/*",
    "https://*/*",
    "notifications",
    "contextMenus"
  ],
  "web_accessible_resources": [
    "scripts/*",
    "styles/*",
    "fonts/*"
  ],
  "commands": {
    "search-item": {
      "suggested_key": {
        "default": "Alt+C",
        "mac": "Alt+C"
      },
      "description": "CryptoCurrency Check"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "scripts/contentscript.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "applications": {
    "gecko": {
      "id": "crypto-currency-checker@arartificials.com"
    }
  }
}