Examine source code of JSON Viewer

{
  "manifest_version": 3,
  "name": "JSON Viewer",
  "description": "A modern UI for viewing and manipulating JSON",
  "version": "1.1.1",
  "homepage_url": "https://www.github.com/dan3988/json-viewer",
  "action": {
    "default_title": "JSON Viewer",
    "default_icon": {
      "16": "/res/icon16.png",
      "24": "/res/icon24.png",
      "32": "/res/icon32.png"
    },
    "default_popup": "res/popup.html"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "lib/content-script.js"
      ]
    }
  ],
  "icons": {
    "16": "res/icon16.png",
    "48": "res/icon48.png",
    "128": "res/icon128.png",
    "256": "res/icon256.png"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "res/options.html"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "favicon.ico",
        "node_modules/*",
        "lib/*",
        "res/*"
      ]
    }
  ],
  "permissions": [
    "scripting",
    "storage"
  ],
  "optional_permissions": [
    "webRequest"
  ],
  "background": {
    "scripts": [
      "lib/bg.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jsonviewer@dpickett.co.uk"
    }
  }
}