Examine source code of aquanetit-tab-limit

{
  "manifest_version": 2,
  "name": "AquanetIT Tab Limit",
  "version": "2.1",
  "description": "Controls maximum number of browser tabs",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "storage": {
    "managed_schema": "/schema.json"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ru.aquanetit.tablimit@aquanetit.local",
      "strict_min_version": "115.0"
    }
  },
  "web_accessible_resources": [
    "warning.html"
  ]
}