Hello,
I bought a new router ( Mikrotik RouterBoard RB951Ui) and i make it as access point, i am not using it as hotspot, no usernames and no server, i just need to make users after connect, browser open on my Facebook page automatically, does not matter to like it or not, i just want it to open automatically, so is there a way for that? Thanks in advance.

Hello.

You can try with web proxy tool
You must active web-proxy and use a redirect rule, you can guide here:
https://wiki.mikrotik.com/wiki/Manual:IP/Proxy