Examine source code of Crispy VPN

{
  "manifest_version": 3,
  "name": "Crispy VPN",
  "short_name": "Crispy",
  "version": "1.1.3",
  "description": "One-tap VPN: encrypted browsing, hidden IP, zero logs. Blocks ads & phishing. 10 locations worldwide. Free to start.",
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@crispyvpn.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Crispy VPN",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "alarms",
    "tabs",
    "proxy",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "declarativeNetRequest",
    "privacy",
    "notifications",
    "contextMenus"
  ],
  "commands": {
    "toggle-connection": {
      "suggested_key": {
        "default": "Ctrl+Shift+X",
        "mac": "Command+Shift+X"
      },
      "description": "Connect or disconnect Crispy VPN"
    }
  },
  "host_permissions": [
    "https://crispyvpn.com/*",
    "<all_urls>"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ads",
        "enabled": true,
        "path": "rules/ads.json"
      },
      {
        "id": "phishing",
        "enabled": true,
        "path": "rules/phishing.json"
      }
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://crispyvpn.com/*",
        "https://www.crispyvpn.com/*"
      ],
      "js": [
        "content-status.js"
      ],
      "run_at": "document_start"
    }
  ]
}