Examine source code of yoummday

{
  "manifest_version": 3,
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvN9V69rxGeAfDpYXSCvYjOmNW9EdXxRzoYl3syfHWdvCtlYnaqGOWoEcXV5Q/GUUhDw0WUYyjCiW1gGqB9hx8ea88VXAIBFotE01h6ruQip28mFtA8ycv0mDsR4Wz07tACMJIvHMmd8FEBenNQzhjJs9vNey7oA+p4LbMFEERbNrtaqH3LfS/aq1qvfxJPPuHYX+oZnvV69NOGcEZUM5REgNOfPVbhinDDBG9ffFDBzzpNWBtpOrtqupIcHlA+LXOeTo1cmPU3ikETZz65j9UqQG3e0WyqlL9qAbAakk2e8KEcSAlHx5dmTJ7bQLIMjpiigXNSTwWd76BA27dHECAwIDAQAB",
  "name": "yoummday",
  "version": "1.3.0",
  "minimum_chrome_version": "92",
  "default_locale": "en",
  "description": "yoummday",
  "icons": {
    "48": "icons/visual-48.png",
    "96": "icons/visual-96.png",
    "128": "icons/visual-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox_addon@yoummday.com",
      "strict_min_version": "112.0"
    }
  },
  "background": {
    "service_worker": "service-worker.js",
    "scripts": [
      "service-worker.js",
      "background.js"
    ],
    "type": "module"
  },
  "externally_connectable": {},
  "host_permissions": [
    "https://*.yoummday.com/*"
  ],
  "action": {
    "default_popup": "popup/action.html",
    "default_icon": {
      "48": "icons/visual-48.png",
      "96": "icons/visual-96.png",
      "128": "icons/visual-128.png"
    },
    "default_title": "yoummday"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "img/*"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "permissions": [
    "notifications",
    "storage",
    "cookies",
    "contextMenus",
    "webRequest",
    "webRequestBlocking"
  ]
}