Examine source code of VideoTab

{
  "name": "VideoTab",
  "version": "1.0",
  "description": "This extension switches to the tab with Google Meet running with the associated hotkey.",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "background": {
    "scripts": [
      "video-tab.js"
    ],
    "persistent": true
  },
  "commands": {
    "switch-to-google-meet": {
      "suggested_key": {
        "default": "Ctrl+Shift+Q"
      },
      "description": "Send a 'switch-to-google-meet' event to the extension"
    }
  },
  "icons": {
    "16": "icons/video-tab-16.png",
    "32": "icons/video-tab-32.png",
    "48": "icons/video-tab-48.png",
    "64": "icons/video-tab-64.png",
    "128": "icons/video-tab-128.png",
    "256": "icons/video-tab-256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1c8eea47-ad89-4b5a-a699-1b5413207464}"
    }
  }
}