Examine source code of threads2notion

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "0.0.5",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "https://api.mixpanel.com/*",
    "https://api.lemonsqueezy.com/*",
    "https://api.notion.com/*"
  ],
  "web_accessible_resources": [
    "interceptor-injected.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ghdtjs0417@gmail.com"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "threads2notion",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.threads.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/app.js"
      ]
    },
    {
      "matches": [
        "https://auth.threads2notion.com/*"
      ],
      "js": [
        "content-scripts/auth.js"
      ]
    }
  ]
}