Examine source code of Abdal Reverse Type

{
  "manifest_version": 2,
  "name": "Abdal Reverse Type",
  "version": "4.4",
  "author": "Ebrahim Shafiei (EbraSha)",
  "homepage_url": "https://github.com/ebrasha/abdal-reverse-type",
  "description": "Convert text between English and Persian characters with right-click menu, custom keyboard shortcuts, and multiple keyboard layout support",
  "browser_specific_settings": {
    "gecko": {
      "id": "abdal-reverse-type@Prof.Shafiei"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>",
    "contextMenus",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon48.png",
      "96": "icons/icon96.png"
    },
    "default_title": "Abdal Reverse Type"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}