YouTube Thumbnails

Show the thumbnail image of watching movie on YouTube

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "Show the thumbnail image of watching movie on YouTube",
  "manifest_version": 2,
  "name": "YouTube Thumbnails",
  "version": "1.0",
  "homepage_url": "https://github.com/tyru/youtube-thumbnails",
  "icons": {
    "48": "icon-48.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs"
  ]
}