Examine source code of EMOL.com comments remover

{
  "manifest_version": 2,
  "name": "EMOL.com comments remover",
  "version": "1.0",
  "description": "Removes all types of references to comments on the site emol.com.",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.emol.com/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bac36889-cd8f-4c5c-91e0-8a9c375edbf0}"
    }
  }
}