From the url documentation page
| v15.13.0, v14.17.0 | Deprecation revoked. Status changed to "Legacy". | 
| v11.0.0 | This API is deprecated. | 
Legacy: Use the WHATWG URL API instead.
Bindings in URL also use the querystring module (and perhaps should have been in a separate PureScript module originally)
The querystring API is considered Legacy. While it is still maintained, new code should use the  API instead.