By socks i mean add proxy support for socks5 and by websocket i mean add support to capture websocket traffic
Sorry i didn't see the release note of 3.0, it seems that websocket traffic is support since 3.0
Indeed, the WebSocket support is greatly improved with version 3.0.0.
Related documentation article about the new WebSocket inspectors: https://docs.telerik.com/fiddler-everywhere/user-guide/inspector-types#websocket-inspectors
The support for SOCKS5 is not in our immediate plans but we have that in our backlog. I will let you know as soon as the team starts working on that task.