Examine source code of HelaKatha - Sinhala Input Tool

{
  "manifest_version": 3,
  "name": "HelaKatha - Singlish to Sinhala",
  "version": "1.0.1",
  "description": "Smart Singlish to Sinhala phonetic typing tool with real-time transliteration, predictions, and FM Abhaya legacy conversion on any website.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "helakatha-sinhala-input@mudhitha.net",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "HelaKatha Singlish (Alt+Space)",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "engine.js",
        "content.js"
      ],
      "css": [
        "floating_box.css"
      ],
      "run_at": "document_end"
    }
  ],
  "commands": {
    "toggle-helakatha": {
      "suggested_key": {
        "default": "Alt+Space",
        "mac": "Alt+Space"
      },
      "description": "Toggle Singlish to Sinhala Typing ON/OFF"
    }
  }
}