Examine source code of LTH Privacy Shield

{
  "manifest_version": 2,
  "name": "Privacy Shield",
  "version": "1.3",
  "description": "Blocks trackers and protects downloads",
  "browser_specific_settings": {
    "gecko": {
      "id": "privacy-shield@yourdomain.com"
    }
  },
  "web_accessible_resources": [
    "report.html"
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "cookies",
    "downloads",
    "notifications",
    "<all_urls>"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}