Script placement of firewall rules to the first position.

RouterOS Scripting
3

Simply use place-before=*****0 with or without already defined rules.

Example:

/ip firewall mangle
add action=add-dst-to-address-list address-list=Netflix address-list-timeout=30m chain=prerouting comment="Limit Netflix (Address List)" \
    content=nflxvideo.net place-before=*0

2025 addendum:
https://forum.mikrotik.com/viewtopic.php?p=1132720#p1132671