Youtube Playback Speed Control

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Youtube Playback Speed Control",
  "version": "0.0.13",
  "manifest_version": 3,
  "description": "Control speed of the youtube playback using keyboard. Press '+' to increase and '-' to decrease the playback speed.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "options_page": "src/option/options.html",
  "background": {
    "service_worker": "src/background.js"
  },
  "action": {
    "default_title": "Control speed of the youtube playback using keyboard or single mouse click.",
    "default_icon": {
      "19": "icons/icon19.png"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "css/inject.css"
      ],
      "js": [
        "src/inject/inject.js"
      ],
      "run_at": "document_end"
    }
  ]
}