Examine source code of Video Control Hub Pick

{
  "manifest_version": 3,
  "name": "Video Control Hub",
  "version": "1.0",
  "description": "Control video playback speed, mute/unmute, and switch videos with customizable settings.",
  "permissions": [
    "activeTab",
    "storage",
    "commands"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "commands": {
    "increase-speed": {
      "suggested_key": {
        "default": "Ctrl+Shift+Up"
      },
      "description": "Increase video playback speed"
    },
    "decrease-speed": {
      "suggested_key": {
        "default": "Ctrl+Shift+Down"
      },
      "description": "Decrease video playback speed"
    },
    "toggle-mute": {
      "suggested_key": {
        "default": "Ctrl+Shift+M"
      },
      "description": "Toggle video mute/unmute"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "video-control-hub@myextension.com"
    }
  }
}