Examine source code of Muse for Mac

{
  "manifest_version": 3,
  "name": "Muse",
  "version": "1.1.0",
  "description": "Save anything on the web to your Muse library with a right click or the in-page clipper.",
  "browser_specific_settings": {
    "gecko": {
      "id": "muse@theodorehq.com",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "contextMenus",
    "scripting",
    "storage",
    "notifications",
    "activeTab"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "host_permissions": [
    "http://127.0.0.1:17894/*",
    "http://localhost:17894/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/clipper.js"
      ],
      "css": [
        "content/clipper.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "optional_host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*",
    "https://www.instagram.com/*",
    "https://instagram.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Muse",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  }
}