Examine source code of Zensur

{
  "manifest_version": 2,
  "name": "Zensur",
  "author": "einKnie@gmx.at",
  "version": "1.4",
  "description": "Removes unwanted domains from search engine results",
  "applications": {
    "gecko": {
      "id": "zensur@einKnie"
    }
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Zensur",
    "browser_style": true,
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "options_ui": {
    "page": "options/options.html"
  },
  "background": {
    "scripts": [
      "z_background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "z_content.js"
      ]
    }
  ]
}