Examine source code of Plastic-Free Reminder

{
  "manifest_version": 2,
  "name": "Plastic-Free Reminder",
  "version": "1.0",
  "description": "Displays a daily reminder to reduce single-use plastic usage.",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e9329b95-eed1-4d2c-bb1c-2c976ea5050c}"
    }
  }
}