This release adds support for WebSockets in Burp Repeater.

You can select a WebSocket message in the Proxy history or intercept tab, and choose "Send to Repeater" from the context menu:

Each message you send to Repeater opens in a new tab. Here, you can manually edit and send the message, view the full message history, pick a message from the history and manually edit and resend it, and manage the WebSocket connection:

As always, feedback about this new feature is welcome.

Have fun!