Examine source code of NoteGen Clipper

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "0.1.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f2a1c4e-9b7d-4e6a-8c15-2f9d4b6a1e70}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "alarms",
    "webRequest",
    "webRequestBlocking",
    "declarativeNetRequest"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "notegen_shim",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "host_permissions": [
    "http://127.0.0.1:37421/*",
    "http://*/*",
    "https://*/*"
  ],
  "action": {
    "default_title": "NoteGen Clipper",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": []
}