Examine source code of OLED ChatGPT Theme

{
  "manifest_version": 2,
  "name": "OLED ChatGPT Theme",
  "version": "1.0",
  "description": "OLED-style for ChatGPT",
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "https://chatgpt.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup/popup.html",
    "default_title": "OLED ChatGPT Theme"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f150d874-23ad-4b10-a4b1-dd12e9e865a7}"
    }
  }
}