Examine source code of Web Player for faster

{
  "manifest_version": 2,
  "name": "Spotify Web Player Hotkeys",
  "version": "1.0.0",
  "description": "Keyboard hotkeys for controlling the Spotify Web Player (play/pause, next, prev, volume, seek, like).",
  "permissions": [
    "activeTab",
    "tabs",
    "<all_urls>",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.spotify.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_title": "Spotify Hotkeys",
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S"
      },
      "description": "Open Spotify Hotkeys popup"
    },
    "toggle-play": {
      "suggested_key": {
        "default": "Alt+P"
      },
      "description": "Play / Pause"
    },
    "next-track": {
      "suggested_key": {
        "default": "Alt+Right"
      },
      "description": "Next track"
    },
    "prev-track": {
      "suggested_key": {
        "default": "Alt+Left"
      },
      "description": "Previous track"
    },
    "vol-up": {
      "suggested_key": {
        "default": "Alt+Up"
      },
      "description": "Volume up"
    },
    "vol-down": {
      "suggested_key": {
        "default": "Alt+Down"
      },
      "description": "Volume down"
    },
    "seek-forward": {
      "suggested_key": {
        "default": "Alt+Shift+Right"
      },
      "description": "Seek forward 10s"
    },
    "seek-backward": {
      "suggested_key": {
        "default": "Alt+Shift+Left"
      },
      "description": "Seek backward 10s"
    },
    "toggle-like": {
      "suggested_key": {
        "default": "Alt+L"
      },
      "description": "Toggle Save/Like"
    }
  },
  "applications": {
    "gecko": {
      "id": "spotify-hotkeys@example.com"
    }
  }
}