Timer for Google Meet

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Timer for Google Meet",
  "description": "Realtime timer for google meet.",
  "default_locale": "en",
  "version": "9.0",
  "author": "DGT",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://zoom.us/*",
    "https://*.zoomgov.com/*",
    "https://meet.google.com/*",
    "https://*.gotomeet.me/*",
    "https://*.gotowebinar.com/*"
  ],
  "icons": {
    "16": "./src/images/logo_16.png",
    "32": "./src/images/logo_32.png",
    "48": "./src/images/logo_48.png",
    "128": "./src/images/logo_128.png"
  },
  "manifest_version": 3,
  "action": {
    "default_popup": "src/popup.html"
  },
  "background": {
    "service_worker": "background.js"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "src/sounds/ringtone.mp3",
        "/images/record.png",
        "/images/recimage.png",
        "/images/howto.jpg"
      ],
      "matches": [
        "https://*.zoom.us/*",
        "https://*.zoomgov.com/*",
        "https://meet.google.com/*",
        "https://*.gotomeet.me/*",
        "https://*.gotowebinar.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.zoom.us/*",
        "https://zoomgov.com/*",
        "https://meet.google.com/*",
        "https://*.gotomeet.me/*",
        "https://*.gotowebinar.com/*"
      ],
      "js": [
        "src/sdk/socket.io-2.3.0.js",
        "src/sdk/sentry-5.21.1.js",
        "./src/content.js"
      ],
      "css": [
        "./src/styles.css"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}