# Frequently asked questions ## The certificate doesn't work In the **Chrome application,** there's little we can do to help. In the **desktop application,** there's a mechanism to manage client certificates. Open the certificates manager from Request > Web Session > Client certificates menu. After adding a certificate to the application internal store you can choose it in the request editor, in the Authorization tab. ## Can I set up a proxy? Version 16 and below do not offer proxy configuration. This was added in version 17. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.advancedrestclient.com/using-arc/frequently-asked-questions.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.