Examine source code of My Smart Routine

{
  "manifest_version": 3,
  "name": "My Smart Routine",
  "version": "1.1",
  "description": "Manage your day smartly and get timely reminders. Developed by Rony Chandra Das.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "declarativeNetRequest",
    "declarativeNetRequestFeedback"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "My Smart Routine",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "blocked.html",
        "blocked.css",
        "notification.html",
        "notification.js",
        "notification.css",
        "icons/icon-48.png",
        "audio/notification.mp3"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "my-smart-routine@rony-chandra-dash.org"
    }
  }
}