Examine source code of Colorful Everything

{
  "manifest_version": 2,
  "name": "Colorful Everything",
  "version": "2.1resigned1",
  "description": "Rangeen Everything",
  "icons": {
    "32": "ico.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f59ce004-29c5-4a16-8636-5101ea0887b6}"
    }
  }
}