Examine source code of iNatSpectro

{
  "manifest_version": 2,
  "name": "iNatSpectro",
  "short_name": "iNatSpectro",
  "version": "4.3.4",
  "description": "The missing Spectrogram for iNaturalist - Displays a spectrogram for audio on iNaturalist observation pages using the Web Audio API.",
  "icons": {
    "16": "images/icon-16.png",
    "19": "images/icon-19.png",
    "32": "images/icon-32.png",
    "38": "images/icon-38.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png"
  },
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.inaturalist.org/observations/*",
        "*://www.inaturalist.nz/observations/*",
        "*://www.inaturalist.ca/observations/*",
        "*://www.inaturalist.se/observations/*",
        "*://www.inaturalist.lu/observations/*",
        "*://inaturalist.ala.org.au/observations/*",
        "*://inaturalist.mma.gob.cl/observations/*",
        "*://inaturalist.laji.fi/observations/*",
        "*://www.biodiversity4all.org/observations/*",
        "*://www.argentinat.org/observations/*",
        "*://www.naturalista.uy/observations/*"
      ],
      "js": [
        "src/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "*://*.inaturalist.org/*",
    "*://api.inaturalist.org/*",
    "*://www.inaturalist.nz/*",
    "*://www.inaturalist.ca/*",
    "*://www.inaturalist.se/*",
    "*://www.inaturalist.lu/*",
    "*://inaturalist.ala.org.au/*",
    "*://inaturalist.mma.gob.cl/*",
    "*://inaturalist.laji.fi/*",
    "*://www.biodiversity4all.org/*",
    "*://www.argentinat.org/*",
    "*://www.naturalista.uy/*",
    "*://inaturalist-open-data.s3.amazonaws.com/*",
    "*://api.inatspectro.org/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "inatspectro@japh.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "web_accessible_resources": [
    "spectro.worker.js",
    "spectro.worklet.js",
    "spectro_wasm/pkg/spectro_wasm.js",
    "spectro_wasm/pkg/spectro_wasm_bg.wasm"
  ]
}