Examine source code of AI to Butt

{
  "manifest_version": 2,
  "name": "AI to Butt",
  "version": "1.0",
  "description": "Replaces instances of 'AI' and 'A.I.' with 'butt' while preserving case sensitivity",
  "icons": {
    "48": "icons/butt-48.png",
    "96": "icons/butt-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "replace.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb7aab00-8312-42d6-ac19-f473053fb442}"
    }
  }
}