Examine source code of RTL Converter

{
  "manifest_version": 2,
  "name": "RTL Converter",
  "version": "1.0",
  "description": "RTL Converter: Instantly toggle any webpage (including ChatGPT & DeepSeek) to RTL mode per-tab, with persistent states and visual feedback—ideal for multilingual browsing!",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "RTL Converter"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{30676a31-ae36-43d1-bb61-35b561c190a1}"
    }
  }
}