Examine source code of GTFO

{
  "manifest_version": 2,
  "name": "GTFO",
  "version": "2.0.1.1",
  "description": "Local page inspection tools for URLs, sources, images, settings, hidden content, and right-click repair.",
  "permissions": [
    "tabs",
    "downloads",
    "<all_urls>",
    "storage"
  ],
  "icons": {
    "48": "icons/GTFO_48.png",
    "96": "icons/GTFO_96.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/GTFO_48.png",
      "96": "icons/GTFO_96.png"
    },
    "default_title": "GTFO",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{379f97b0-a00f-4e06-a310-5756e5ac19d8}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}