Browsing and download

hi all
I have network shared by ( 60 user) and i have 4 M isp, some user download alarge amount of data and other user cant browsing anything please help me to Separate between browisng and download in my network

/ip fir man
add action=mark-packet chain=forward comment=“” disabled=no dst-port=80 new-packet-mark=“web limit” passthrough=yes protocol=tcp


/queue simple
add burst-limit=0/0 burst-threshold=0/0 burst-time=0s/0s comment=“” direction=both disabled=no dst-address=0.0.0.0/0 interface=all
limit-at=1M/1M max-limit=1M/1M name=queue18 packet-marks=“web limit” parent=none priority=1 queue=default-small/default-small
total-queue=default-small