Why doesn't Firefox spoof the user agent to Windows NT 10 Win64?

I noticed, that on Windows it would normally add, that it is running 64 bits. Older example (2017):

`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0`

When i spoof my user-agent with `privacy.resistFingerprinting` it shows:

`Mozilla/5.0 (Windows NT 10.0; rv:106.0) Gecko/20100101 Firefox/106.0`

This should have a much higher entropy since it explicitly shows, that the client is spoofed.

Wouldn't it be better to include the 64 bit identifier?

agent firefox privacy spoof windows