Examine source code of EasyU

{
  "name": "EasyU",
  "description": "All in one easy access to essential open university site features",
  "version": "1.2.2",
  "manifest_version": 3,
  "icons": {
    "16": "easyicon_16.png",
    "32": "easyicon_32.png",
    "48": "easyicon_48.png",
    "128": "easyicon_small.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "henbendor7@gmail.com"
    }
  },
  "action": {
    "default_popup": "page.html",
    "default_icon": "easyicon.png"
  },
  "host_permissions": [
    "https://opal.openu.ac.il/*",
    "https://sheilta.apps.openu.ac.il/*",
    "https://*.openu.ac.il/*"
  ],
  "background": {
    "service_worker": "notificationsHandler.js",
    "scripts": [
      "notificationsHandler.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://sso.apps.openu.ac.il/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    },
    {
      "matches": [
        "https://sheilta.apps.openu.ac.il/pls/dmyopt2/*"
      ],
      "js": [
        "calendar.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "styleCalendar.css",
        "icons/*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ]
}