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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Sketch",
  "short_name": "Sketch",
  "description": "Sketch using a simple tools. Save your drawing as png or svg",
  "version": "1.0.3",
  "icons": {
    "16": "images/16x16.png",
    "32": "images/32x32.png",
    "36": "images/36x36.png",
    "48": "images/48x48.png",
    "64": "images/64x64.png",
    "72": "images/72x72.png",
    "96": "images/96x96.png",
    "128": "images/128x128.png",
    "144": "images/144x144.png",
    "192": "images/192x192.png",
    "512": "images/512x512.png"
  },
  "permissions": [],
  "background": {},
  "action": {
    "default_icon": "images/96x96.png",
    "default_popup": "index.html",
    "default_title": "Sketch"
  }
}