FeeFlutter - bitcoin transaction cost

Real-time btc fee price. Spot great moments to make bitcoin transactions with this tool

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "FeeFlutter - bitcoin transaction cost",
  "description": "Real-time btc fee price. Spot great moments to make bitcoin transactions with this tool",
  "version": "2.1.1",
  "action": {
    "default_popup": "background.html",
    "default_icon": "bitcoin.png"
  },
  "background": {
    "service_worker": "background.js",
    "type": "module"
  },
  "permissions": [
    "storage",
    "alarms"
  ]
}