Examine source code of Excellent Data Filler

{
  "version": "4.10.5",
  "manifest_version": 3,
  "default_locale": "en",
  "permissions": [
    "storage",
    "unlimitedStorage",
    "contextMenus",
    "browsingData",
    "notifications",
    "alarms",
    "scripting",
    "tabs",
    "nativeMessaging",
    "downloads",
    "webRequest",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "service-worker.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/16x16.png",
      "24": "icons/24x24.png",
      "32": "icons/32x32.png"
    }
  },
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://localhost/*",
        "https://stable.edfiller.in/*",
        "https://edfiller.pages.dev/*"
      ],
      "js": [
        "contentScript2.js"
      ],
      "match_about_blank": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "js": [
        "contentScript8.js",
        "contentScript16.js",
        "contentScript18.js",
        "contentScript20.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "css": [
        "assets/css/basic.css",
        "assets/css/snackbar.css",
        "assets/css/toastify.css"
      ],
      "js": [
        "contentScript5.js",
        "contentScript6.js",
        "assets/js/js-snackbar.js",
        "assets/js/selector-generator.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*",
        "contentScript11.js",
        "contentScripts5.js",
        "contentScripts6.js",
        "contentScripts16.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "commands": {
    "start-stop-excellent-data-filler-v4": {
      "suggested_key": {
        "default": "Alt+Q",
        "windows": "Alt+Q"
      },
      "description": "Start/Pause"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e4557c9e-60b4-4097-9b42-ddc335f88722}",
      "strict_min_version": "109.0"
    }
  },
  "name": "__MSG_appName__",
  "short_name": "__MSG_appShortName__",
  "description": "__MSG_appDescription__"
}