restore button

Author: timcappalli

content/en/device-support/index.md

@@ -12,6 +12,8 @@ This page, along with the rest of passkeys.dev, is targeted at relying party dev
 
 This matrix represents the default capabilities for a user out of the box. Additional capabilities may be available when a user installs a different passkey provider.
 
+{{< button color="dark" href="https://featuredetect.passkeys.dev" >}}Test this client!{{< /button >}}
+
 ### Basic Capabilities {#basics}
 
 {{< unsafe >}}