Examine source code of Sexify

{
  "manifest_version": 2,
  "name": "Sexify",
  "version": "1.0",
  "description": "Converts all numbers to seximal",
  "icons": {
    "48": "icons/seximal-120.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "sexify.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6a70728-95c6-4a3e-85d2-d80542166ea9}"
    }
  }
}