clean the download list

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "clean the download list",
  "short_name": "ACDL",
  "description": "Automatically clean the download list.",
  "version": "0.1.1",
  "permissions": [
    "downloads",
    "downloads.shelf"
  ],
  "background": {
    "service_worker": "background.js"
  },
  "icons": {
    "16": "assets/icon_16.png",
    "128": "assets/icon_128.png"
  }
}