The third extension value of ja3 seems to be incorrect

[TRHX]

The service built using your nginx extension received a last value of 41 for the third extension in most cases, but what I saw on other websites was random every time. I tested it using Windows Chrome 128.

An interesting phenomenon is that sometimes on the first visit, the value obtained is random, but when the webpage is refreshed later, the value returned to 41. I don't know if this phenomenon is caused by my configuration error or some other reason.

Based on your expansion:

https://tls.peet.ws/api/all ：

https://tls.browserleaks.com/json :

[snoad]

https://chromestatus.com/feature/5124606246518784discusses a new change, designed to prevent ossification, in which client hellos will be randomized, subject to the limits in the RFC.

It was originally scheduled to go into Chrome 110, but was actually merged in Chrome 109.