Examine source code of Picture-in-Picture - Pro Floating Player

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_name__",
  "description": "__MSG_description__",
  "version": "1.0",
  "default_locale": "en",
  "manifest_version": 3,
  "icons": {
    "32": "assets/static/128.png",
    "64": "assets/static/128.png",
    "128": "assets/static/128.png"
  },
  "action": {
    "default_title": "__MSG_name__"
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "worker.js"
  },
  "options_page": "options.html",
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+P",
        "linux": "Alt+P",
        "windows": "Alt+P",
        "mac": "Command+P"
      }
    },
    "play": {
      "suggested_key": {
        "default": "Alt+1",
        "linux": "Alt+1",
        "windows": "Alt+1",
        "mac": "Command+1"
      },
      "description": "Play/Pause"
    },
    "rewindUp": {
      "suggested_key": {
        "default": "Alt+3",
        "linux": "Alt+3",
        "windows": "Alt+3",
        "mac": "Command+3"
      },
      "description": "Rewind (+10sec)"
    },
    "rewindDown": {
      "suggested_key": {
        "default": "Alt+2",
        "linux": "Alt+2",
        "windows": "Alt+2",
        "mac": "Command+2"
      },
      "description": "Rewind (-10sec)"
    },
    "volumeDown": {
      "description": "Volume down"
    },
    "volumeUp": {
      "description": "Volume up"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}