Examine source code of Testing tool

{
  "manifest_version": 2,
  "name": "Testing tool",
  "version": "2.0.2resigned1",
  "author": "Aliaksander Samkou, Oleksandr Bohachov, Oleg Popov",
  "description": "Testing tool which can fill registration fields/show json version.",
  "icons": {
    "48": "icons/TT.jpg"
  },
  "permissions": [
    "tabs",
    "cookies",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/TT.jpg"
    },
    "default_title": "TT",
    "default_popup": "popup/testtool.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/webdom.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{beff26e4-d42e-4053-8326-13764a703a21}"
    }
  }
}