Examine source code of greenwire-uii

{
  "manifest_version": 2,
  "name": "greenwire-uii",
  "version": "0.0.8",
  "description": "Improves the UI for greenwire.greenpeace.de",
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://greenwire.greenpeace.de/*"
      ],
      "js": [
        "content_scripts.js"
      ],
      "css": [
        "styles/style.css"
      ]
    }
  ]
}