Examine source code of Better ITV controls

{
  "manifest_version": 2,
  "name": "Better ITV controls",
  "version": "1.0",
  "description": "Allows skipping forward/back and pausing using the spacebar and arrow keys respectively.",
  "content_scripts": [
    {
      "matches": [
        "*://*.itv.com/*"
      ],
      "js": [
        "player.js"
      ]
    }
  ],
  "permissions": [
    "*://itv.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{83d445fe-6835-4187-8454-b527f7bf4350}"
    }
  }
}