Examine source code of Darker Jupyter

{
  "manifest_version": 2,
  "name": "Darker Jupyter",
  "description": "Dark Mode for Jupyter Notebooks",
  "version": "2.4.2",
  "author": "Kent Leo L. Makibulan",
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "offline_enabled": true,
  "permissions": [
    "tabs",
    "*://*/*.ipynb",
    "*://*/*.ipynb?*",
    "*://*/tree*",
    "*://*/terminals/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "storage-clear.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon16.png",
      "24": "images/icon16.png",
      "32": "images/icon16.png"
    },
    "default_title": "Darker Jupyter",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*.ipynb",
        "*://*/*.ipynb?*",
        "*://*/tree*",
        "*://*/terminals/*"
      ],
      "css": [
        "dark.css"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8c15309c-d4e3-49b2-a099-54f92f02f53d}"
    }
  }
}