Examine source code of Textise This

{
  "name": "Textise This",
  "description": "An alterative text reader: Powered by textise.net",
  "version": "1.2",
  "manifest_version": 2,
  "browser_action": {
    "default_title": "Textise This",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "background.js"
      ]
    }
  ],
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9200c23b-cdf1-4b16-8106-70f3bde8963a}"
    }
  }
}