Examine source code of SparkProxy - Premium Proxy

{
  "manifest_version": 3,
  "name": "SparkProxy - Premium Rotating Proxy",
  "short_name": "SparkProxy",
  "version": "1.1.0",
  "description": "Manage your SparkProxy connection from the toolbar. Connect in one click, monitor live usage stats, and switch locations anytime.",
  "homepage_url": "https://www.sparkproxy.io",
  "browser_specific_settings": {
    "gecko": {
      "id": "sparkproxy@sparkproxy.io",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "121.0"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "proxy",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "SparkProxy",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      },
      "description": "Open SparkProxy"
    }
  }
}