URL filtering

[Niokhobaye]

Hello everyone, I had some questions, if you could help me
1) Is it possible to insert and modify HTTP headers on the check point firewall ? if I can have a capture please 

2)Do you know a machine learning (ML) engine on the check point firewall for detecting attacks via Javascript exploit?

3)Firewall check point Supports multi-categorization by classifying URLs according to their content, as well as their risk level (High-risk, Medium-risk and Low-risk). ?

Thanks in advance