Examine source code of Captcha Translate

{
  "manifest_version": 2,
  "name": "Captcha Translate",
  "version": "1.0.2",
  "description": "Screen Capture and translate the wording of the captcha inside from Chinese to English",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "<all_urls>",
    "sidePanel",
    "scripting",
    "commands",
    "storage",
    "activeTab"
  ],
  "sidebar_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Captcha Translate",
    "default_panel": "main/sidepanel.html"
  },
  "options_page": "option/options.html",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Alt+Shift+T",
        "mac": "Alt+Shift+T"
      },
      "description": "Open Extension"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6d30e7bb-b1a7-4f30-b946-c35ea9392318}"
    }
  }
}