Youtube speed control

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Youtube speed control",
  "description": "This extension allows the user to change video speed with ctrl + > and ctrl + <. To return speed to 1 press ctrl + ?",
  "version": "1.1",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": "icon.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "https://www.youtube.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "jquery-3.2.1.min.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "all_frames": true
    }
  ]
}