Examine source code of Address Alert

{
  "manifest_version": 3,
  "name": "Address Alert",
  "version": "1.0.3",
  "description": "Warns you before accidentally shipping to a saved danger address.",
  "browser_specific_settings": {
    "gecko": {
      "id": "address-alert@local",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "120.0"
    }
  },
  "background": {
    "scripts": [
      "lib/browser-polyfill.js",
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "content/observer.js",
        "content/scanner.js",
        "content/alertUI.js",
        "content/content_script.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "32": "assets/icons/icon32.png",
      "48": "assets/icons/icon48.png",
      "128": "assets/icons/icon128.png"
    }
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}