Examine source code of Focused Instagram Chat

{
  "manifest_version": 2,
  "name": "Focused Instagram Chat",
  "version": "1.0",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "description": "Removes all distractions from instagram.com except for the chat, so that you don't get sucked into scrolling through your feed for hours when all you really wanted to do was reply to a friend.",
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "focus.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f0fc073-f4f0-4bcb-a7dc-8f99f201d8db}"
    }
  }
}