Examine source code of Annoying typo

{
  "manifest_version": 2,
  "name": "Annoying typo",
  "version": "1.1resigned1",
  "description": "Change the content of input",
  "icons": {
    "48": "icons/annoying.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "annoying.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4b51afff-e91d-4157-84bf-8532c18312fd}"
    }
  }
}