Examine source code of Comicify

{
  "manifest_version": 2,
  "name": "Comicify",
  "version": "1.0",
  "description": "Turn all fonts to Comic Sans MS",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  }
}