Examine source code of CoinSign Extension

{
  "name": "__MSG_appName__",
  "version": "0.2.1",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon-16.png",
    "24": "icons/icon-24.png",
    "48": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_title": "__MSG_appName__",
    "default_popup": "html/index.html"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4488b68e-2aa9-42e3-a1f0-156cb0a63ed4}"
    }
  }
}