We should do the work to enable TLS/1.3 in Fiddler (it's very little additional work to add "Tls1.3" to the options dialog and the underlying code).
Posted on:05 Jul 2023 08:05
The Fiddler team still supports Fiddler Classic, and all features related to that product are triaged, prioritized, and planned for future releases.
Currently, the team's main priority is developing and improving the new cross-platform version of Fiddler called Fiddler Everywhere. The application works on macOS, Linux, and Windows and provides modern UI and fresh features, including support for TLS 1.3, HTTP/2, gRPC, and much more.