Examine source code of Auto Unmute

{
  "manifest_version": 3,
  "name": "Auto Unmute",
  "version": "1.10",
  "description": "Monitors for Mute button and Unmute automatically.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://streamyard.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://streamyard.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/assets/disable/16x16.png",
      "32": "/assets/disable/32x32.png",
      "48": "/assets/disable/48x48.png",
      "64": "/assets/disable/64x64.png",
      "128": "/assets/disable/128x128.png"
    }
  },
  "icons": {
    "16": "/assets/disable/16x16.png",
    "32": "/assets/disable/32x32.png",
    "48": "/assets/disable/48x48.png",
    "64": "/assets/disable/64x64.png",
    "128": "/assets/disable/128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "auto-unmute@auto.unmute"
    }
  }
}