Examine source code of kickassanimeclean

{
  "manifest_version": 2,
  "name": "kickassanime",
  "version": "1.2",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d747d3e-ac90-4183-8e09-e641b1353e4e}"
    }
  }
}