Examine source code of JSON Viewer-MV3

{
  "author": "Tulio Ornelas <ornelas.tulio@gmail.com>",
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "service_worker": "assets/background.js"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa6217ed-60db-49c4-a05c-9dea3e944331}",
      "data_collection_permissions": {
        "enabled": false,
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "js": [
        "assets/viewer.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "The most beautiful and customizable JSON/JSONP highlighter that your eyes have ever seen. Open source at https://goo.gl/fmphc7",
  "homepage_url": "https://github.com/tulios/json-viewer",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "128": "icons/128.png"
  },
  "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCruFyb/8fP+PcCb2lBfX9kQrQXa0wE0PE+PTbfl6/ljgsJKpu2CTzEJWCci140a0okKgPJZihxX88iIJrFEZC8Gm0n+irynwuvVUCfKZ4odCfCSlWo/GS1tJREK36jc4vppVLzq0Cu9OEKKzN6vQimT/vPpjGxJqjces3t2RZLFwIDAQAB",
  "manifest_version": 3,
  "minimum_chrome_version": "102",
  "name": "JSON Viewer",
  "omnibox": {
    "keyword": "json-viewer"
  },
  "options_page": "pages/options.html",
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "storage",
    "scripting"
  ],
  "version": "0.18.5",
  "web_accessible_resources": [
    {
      "resources": [
        "assets/viewer.css",
        "assets/viewer-alert.css",
        "pages/options.html",
        "pages/omnibox.html",
        "themes/light/base16-light.css",
        "themes/light/coy.css",
        "themes/light/funky.css",
        "themes/light/mdn-like.css",
        "themes/light/neo.css",
        "themes/light/solarized_light.css",
        "themes/light/yeti.css",
        "themes/dark/3024-night.css",
        "themes/dark/ambiance.css",
        "themes/dark/base16-dark.css",
        "themes/dark/cobalt.css",
        "themes/dark/dark.css",
        "themes/dark/dracula-custom.css",
        "themes/dark/dracula.css",
        "themes/dark/jellybeans.css",
        "themes/dark/material.css",
        "themes/dark/mbo.css",
        "themes/dark/mehdi.css",
        "themes/dark/midnight.css",
        "themes/dark/monokai.css",
        "themes/dark/okaidia.css",
        "themes/dark/panda-syntax.css",
        "themes/dark/solarized_dark.css",
        "themes/dark/tomorrow.css",
        "themes/dark/twilight.css",
        "themes/dark/zenburn.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}