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manifest.json
{
  "manifest_version": 3,
  "name": "YouTube Speed Controller",
  "version": "1.0",
  "description": "A simple Edge extension to control the playback speed of YouTube videos.",
  "permissions": [
    "tabs",
    "activeTab",
    "scripting"
  ],
  "icons": {
    "48": "icons/favicon-16x16.png",
    "96": "icons/favicon-32x32.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/favicon-16x16.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}