Examine source code of Notion Sidebar Expander

{
  "manifest_version": 3,
  "name": "Notion Sidebar Expander",
  "description": "Expands Notion Sidebar items to reveal the current page",
  "version": "1.1.2",
  "content_scripts": [
    {
      "matches": [
        "https://*.notion.so/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "notion-sidebar-expander@georgegillams.co.uk"
    }
  }
}