Examine source code of Shuffle Words Addon

{
  "manifest_version": 2,
  "name": "Shuffle Words Addon",
  "version": "1.0.1",
  "description": "Randomly rearrange words in text.",
  "browser_action": {
    "default_title": "Shuffle Words",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shuffle-words-addon-1a64184f-6e38-4470-acb4-15be0aeef9b6@example.com",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}