Examine source code of DETEY ("ДЕТЕЙ")

{
  "manifest_version": 2,
  "version": "4",
  "name": "ДЕТЕЙ",
  "browser_action": {
    "default_icon": "DETEY_128_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{04129315-d213-4c99-91dc-4127d26bf012}"
    }
  }
}