Here is the HTTP request in the design HTTP/1.1

GET https://connect.facebook.net/en_US/fbevents.js HTTP/1.1
Accept: application/javascript, */*;q=0.8
Referer: https://stag2.readyrefresh.com/index.cfm?badzip=1800
Accept-Language: fr-CH
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Accept-Encoding: gzip, deflate
Host: connect.facebook.net
DNT: 1
Connection: Keep-Alive

Here is the HTTP request in the replay HTTP/2.0

GET https://connect.facebook.net/en_US/fbevents.js HTTP/2.0
Accept-Encoding: gzip
Accept: application/javascript, */*;q=0.8
Accept-Language: fr-CH
DNT: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Referer: https://stag2.readyrefresh.com/index.cfm?badzip=1800

Why it's not using the same one ?
How can I change it ?

I am getting HTTP400 and I think it's due to this pb (with IE and fiddler I am able to pen this file - http code 400)

Thanks and regards,
Laurent