I Hear You Twitch

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "I Hear You Twitch",
  "version": "1.3.0",
  "description": "Plays a sound when new message comes in Twitch chat",
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "service_worker": "background.js",
    "type": "module"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*",
        "*://*.youtube.com/*"
      ],
      "js": [
        "contentscript.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "action": {
    "default_icon": {
      "19": "images/icon-19.png",
      "38": "images/icon-38.png"
    },
    "default_title": "I Hear You - Twitch"
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "new_message.mp3",
        "images/*.png"
      ],
      "matches": [
        "*://*.twitch.tv/*",
        "*://*.youtube.com/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}