There is such a program ProxHTTPSProxy_TLS_1_3_1_5_220717_PopMenu_3V3. It listens to port 8080. I set proxy 127.0.0.1:8080 in the browser. In addition, I imported the certificate into the browser and into the system. After this, the browser was able to work with TLS 1.3 sites.
Is this possible for RebexTlsProxy?