LoopTube

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "LoopTube",
  "version": "0.0.1",
  "description": "Auto loop the YouTube video",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "youtube.png",
    "48": "youtube.png",
    "128": "youtube.png"
  },
  "browser_action": {
    "default_icon": "youtube.png",
    "default_title": "Turning this extension on will loop the YouTube video automatically"
  }
}