Examine source code of Auto Capital letter

{
  "manifest_version": 2,
  "name": "Auto Capital letter",
  "version": "1.0.4resigned1",
  "description": "Extension for automatic elevating of first sentence letter to capital",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "auto-first-capital.js"
      ]
    }
  ],
  "author": "Oleh Yaroshchuk",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2011827d-8d69-4e6a-b094-c702a6385865}"
    }
  }
}