Examine source code of Canadianify

{
  "manifest_version": 2,
  "name": "Canadianify",
  "version": "1.0",
  "description": "Gets rid of those pesky american spellings and replaces them with their Canadian (British) spelling.",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f60fdc88-0c85-455e-a7ed-e0cbe4a24595}"
    }
  }
}