Examine source code of Topfenstrudel

{
  "manifest_version": 2,
  "name": "Topfenstrudel",
  "version": "1.2.0",
  "description": "Adds a strudel repl on mastodon posts containing '// # strudel' or strudel URLs.",
  "icons": {
    "48": "icons/spiral.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*"
      ],
      "js": [
        "embed.js",
        "ready.js",
        "topfenstrudel.js"
      ]
    }
  ],
  "permissions": [
    "https://strudel.tidalcycles.org/*",
    "https://strudel.cc/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{10158336-40b8-420b-a8eb-088a9951a6aa}"
    }
  }
}