Joak's osu mirror download

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Joak's osu mirror download",
  "description": "Download osu maps from various mirror APIs",
  "version": "3.0",
  "icons": {
    "16": "./images/osu-16.png",
    "48": "./images/osu-48.png",
    "128": "./images/osu-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://osu.ppy.sh/beatmapsets/*"
      ],
      "js": [
        "joak_extension.js"
      ],
      "css": [
        "joak_extension.css"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "service_worker": "background.js"
  }
}