Examine source code of Todo Mailer

{
  "manifest_version": 3,
  "name": "Todo Mailer",
  "version": "1.0.3",
  "description": "Saves todos and sends them to your email.",
  "action": {
    "default_title": "Todo Mailer",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-128.png",
      "32": "icon-128.png",
      "48": "icon-128.png",
      "128": "icon-128.png"
    }
  },
  "icons": {
    "16": "icon-128.png",
    "32": "icon-128.png",
    "48": "icon-128.png",
    "128": "icon-128.png"
  },
  "options_page": "options.html",
  "background": {
    "scripts": [
      "assets/background.js"
    ]
  },
  "permissions": [
    "storage",
    "alarms"
  ],
  "host_permissions": [
    "http://localhost:3000/*",
    "https://todomailer.vercel.app/*",
    "https://*.supabase.co/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "todomailer@moosebro.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo",
          "personalCommunications"
        ]
      }
    }
  }
}