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manifest.json
{
  "name": "YouTubeâ„¢ Repeat Button",
  "description": "Adds a repeat button to the HTML5 player to loop over a single track after 1 second delay",
  "version": "0.2.5",
  "manifest_version": 3,
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "*://www.youtube.com/*"
  ],
  "background": {
    "service_worker": "worker.js"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "/data/inject.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "homepage_url": "https://webextension.org/listing/youtube-tools.html?from=repeat-button",
  "icons": {
    "16": "/data/icons/16.png",
    "32": "/data/icons/32.png",
    "48": "/data/icons/48.png",
    "64": "/data/icons/64.png",
    "128": "/data/icons/128.png",
    "256": "/data/icons/256.png",
    "512": "/data/icons/512.png"
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}