Examine source code of Invis URL

{
  "manifest_version": 2,
  "name": "Invis URL",
  "version": "1.1",
  "description": "Shortens URL display to origin.",
  "author": "placeofinsanity",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_title": "URL Shortener",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "invis-url@placeofinsanity",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}