Examine source code of Azninj

{
  "description": "Azninj is THE Amazon Ninja",
  "manifest_version": 2,
  "name": "Azninj",
  "version": "1.3resigned1",
  "homepage_url": "http://www.reinmueller.org",
  "icons": {
    "48": "icons/azninj-48.png"
  },
  "applications": {
    "gecko": {
      "id": "azninj@azninj.com",
      "strict_min_version": "45.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.*/*"
      ],
      "js": [
        "azninj.js"
      ]
    }
  ]
}