Examine source code of Simple Browsing Schedule

{
  "manifest_version": 3,
  "name": "SimpleBrowsingSchedule",
  "version": "0.51",
  "description": "Schedules your chosen Websites to open on specific days of the week / month / year and at specific times.",
  "icons": {
    "24": "icons/icn24.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simplebrowsingschedule@example.org",
      "strict_min_version": "115.0"
    }
  },
  "action": {
    "default_title": "Simple Browsing Schedule MV3 0.51",
    "default_area": "navbar",
    "default_icon": {
      "24": "icons/icn24.png"
    }
  },
  "permissions": [
    "storage",
    "alarms",
    "tabs"
  ],
  "optional_permissions": [
    "bookmarks"
  ],
  "options_ui": {
    "page": "optionsSBS.html"
  },
  "content_security_policy": {
    "extension_pages": "default-src 'self'"
  },
  "background": {
    "scripts": [
      "backgroundSBS.js",
      "commonSBS.js"
    ]
  }
}