Remove the --false-start flag completely. In the Chrome version it has
no affect, and in the Firefox version it may cause connection errors.
This flag doesn't seem to affect TLS or HTTP signatures so is safe to
remove.
The flag seems to cause connection errors with some
http/2 servers. The server chooses http/2 based on alpn but curl
initiates a http/1.1 connection instead. This is an upstream bug in curl
that affects us as well.
Add support for impersonating Firefox 100. The TLS signature is identical to
previous versions of Firefox.
In addition, upgrade NSS (Firefox's TLS library) to version 3.77 used by
Firefox 100. This is not strictly necessary as the previous version used
works just fine, but it's better keep up with the newest version.