GoogleMeet mute the mic

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "description": "An extension that displays/switches the microphone state of Google Meet by an icon.",
  "name": "GoogleMeet mute the mic",
  "version": "1.1",
  "icons": {
    "16": "./img/mic1.png",
    "48": "./img/mic3.png",
    "128": "./img/mic4.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://meet.google.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "https://meet.google.com/*"
  ],
  "browser_action": {
    "name": "Determine if it is muted.",
    "default_icon": "./img/mic2.png"
  }
}