Examine source code of RTL for Claude

{
  "manifest_version": 3,
  "name": "RTL for Claude",
  "version": "1.4.2",
  "description": "Persian, Arabic, Urdu & every RTL language, finally readable in Claude, ChatGPT & Gemini. Vazirmatn font. 100% local.",
  "browser_specific_settings": {
    "gecko": {
      "id": "rtl-for-claude@mahdigh99",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "optional_host_permissions": [
    "https://*/*"
  ],
  "background": {
    "service_worker": "src/background.js",
    "scripts": [
      "src/background.js"
    ]
  },
  "commands": {
    "cycle-direction": {
      "suggested_key": {
        "default": "Ctrl+Shift+9",
        "mac": "Command+Shift+9"
      },
      "description": "Cycle the whole chat: Auto → RTL → LTR"
    },
    "toggle-enabled": {
      "suggested_key": {
        "default": "Ctrl+Shift+8",
        "mac": "Command+Shift+8"
      },
      "description": "Turn RTL for Claude on or off"
    }
  },
  "action": {
    "default_popup": "src/popup.html",
    "default_title": "RTL for Claude",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://claude.ai/*",
        "https://*.claude.ai/*",
        "https://chatgpt.com/*",
        "https://chat.openai.com/*",
        "https://gemini.google.com/*"
      ],
      "js": [
        "src/rtl-math.js",
        "src/rtl-engine.js",
        "src/content.js"
      ],
      "css": [
        "src/styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "fonts/*"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ]
}