Examine source code of Sublime Tab

{
  "name": "Sublime Tab",
  "version": "1.4.4",
  "description": "Put a notepad on your new tab page!",
  "manifest_version": 3,
  "author": "radiantly",
  "action": {},
  "permissions": [
    "storage",
    "search",
    "unlimitedStorage"
  ],
  "chrome_url_overrides": {
    "newtab": "note.html"
  },
  "icons": {
    "48": "48x48.png",
    "128": "128x128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sublimetab@radiantly",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}