Examine source code of Instagram Redesigned

{
  "name": "Instagram redesigned",
  "version": "0.0.3.9",
  "description": "A new, modern look for Instagram web",
  "browser_action": {
    "default_icon": {
      "16": "assets/logo16.png",
      "32": "assets/logo32.png",
      "48": "assets/logo48.png",
      "128": "assets/logo128.png"
    },
    "default_popup": "src/popup.html"
  },
  "icons": {
    "16": "assets/logo16.png",
    "32": "assets/logo32.png",
    "48": "assets/logo48.png",
    "128": "assets/logo128.png"
  },
  "web_accessible_resources": [
    "assets/open-media.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.instagram.com/*"
      ],
      "css": [
        "src/css/styles.css"
      ],
      "js": [
        "src/js/InstagramAPIUtils.js",
        "src/js/content-script.js"
      ]
    }
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6549b92-46bf-4889-9982-da3ab7712f15}"
    }
  }
}