Audio mixer

manifest.json

{
  "name": "Audio mixer",
  "description": "Apply audio presets such as Nightcore or (slowed + reverb) to any website playing audio.",
  "version": "1.5.0",
  "manifest_version": 3,
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "tabCapture",
    "tabs",
    "webNavigation"
  ],
  "host_permissions": [
    "*://soundcloud.com/*",
    "*://open.spotify.com/*",
    "*://*.youtube.com/*"
  ],
  "content_scripts": [
    {
      "world": "MAIN",
      "matches": [
        "*://soundcloud.com/*",
        "*://open.spotify.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "scripts/inject.js"
      ]
    }
  ],
  "icons": {
    "16": "icon/icon16.png",
    "32": "icon/icon32.png",
    "48": "icon/icon48.png",
    "128": "icon/icon128.png",
    "512": "icon/icon512.png"
  },
  "action": {
    "default_title": "Audio mixer",
    "default_popup": "index.html",
    "default_icon": "icon/icon512.png"
  },
  "background": {
    "service_worker": "app/immutable/background.js",
    "type": "module"
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}