Examine source code of Web destroyer

{
  "manifest_version": 2,
  "name": "web destroyer",
  "version": "1.0.0",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "Content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "Popup.html",
    "default_title": "DestroyWeb"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f12b0709-d301-4603-a34e-bf2944e5dfac}"
    }
  }
}