YouTubeサムネイルオーバーレイボタン非表示

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "YouTubeサムネイルオーバーレイボタン非表示",
  "description": "YouTubeサムネイルオーバーレイボタンを非表示にする。",
  "version": "1.0.0",
  "content_scripts": [
    {
      "css": [
        "style.css"
      ],
      "all_frames": true,
      "matches": [
        "https://www.youtube.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  }
}