Examine source code of GPTstatus

{
  "manifest_version": 3,
  "name": "GPTstatus",
  "version": "1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "gptstatus@example.org"
    }
  },
  "description": "A browser extension that changes its icon depending on the status of ChatGPT.",
  "homepage_url": "https://github.com/Zev18/gptstatus",
  "icons": {
    "128": "icons/128/operational.png"
  },
  "action": {
    "default_icon": "icons/128/operational.png",
    "default_title": "GPTstatus",
    "default_popup": "html/popup.html"
  },
  "background": {
    "scripts": [
      "js/common.js"
    ]
  },
  "options_ui": {
    "page": "html/options.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "tabs"
  ]
}