20 Punch Fighting Game

In this fighting game, fight your opponent in the Box ring and knock him out.

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manifest.json

{
  "action": {
    "default_icon": "128.png"
  },
  "author": "pickergame",
  "background": {
    "service_worker": "background.js"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "default_locale": "en",
  "description": "__MSG_appDesc__",
  "icons": {
    "128": "128.png"
  },
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "sandbox": {
    "pages": [
      "Game_Source/index.html"
    ]
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1"
}