Translation:The firefighters hurry in front of the people.
It's similar to something I'm pretty sure you described yourself in an earlier post! Elé and előtt and 2/3 of a "location trio" - they are the "motion toward" and "location at" parts of the trio. The third member of the trio, for motion away from the front of something, is elől.
Just like the endings -ba / -ban / -ból are for into / inside / from out of.
Most location postpositions have three forms like this.
alá / alatt / alól are the three for "under" (to under / under / from under)
fölé / fölött / fölül for "over/above"
közé / között / közül for "between/among", and others...