Examine source code of CB Horizontal Chat Frame

{
  "manifest_version": 3,
  "name": "CB Horizontal Chat Frame",
  "version": "1.1",
  "description": "Rearranges the CarnageBlender chat into a horizontal frame and styles the embedded chat client for that layout.",
  "content_scripts": [
    {
      "matches": [
        "http://www.carnageblender.com/main.tcl*",
        "https://kechel.de/downloads/carnageblender-chat-client.html*"
      ],
      "js": [
        "horizontal-chat-frame.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cb-horizontal-chat-frame@lvl11evelynn",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}