Youtube Thumbnail Finder

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Youtube Thumbnail Finder",
  "short_name": "Youthumb",
  "description": "Add button on youtube videos to easly get thumbnail",
  "version": "1.3.0",
  "author": "Vegard Bjørsvik",
  "homepage_url": "https://youthumb.net",
  "icons": {
    "128": "logo.png"
  },
  "permissions": [
    "*://www.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "button.js"
      ],
      "run_at": "document_end"
    }
  ]
}