In flydubai (and also in Emirates) we use LIDO charts (= Lufthansa by any other name) and our FlightPlans annotate FIR boundaries (though this latter feature is actually a real pain-in-the-derrière for delivery flights from Seattle, as those intermediate boundary points cause havoc with the circle-tick-cross checks of bearing & distance required of long-range sparse area / oceanic sectors)!... and yes, FIR boundaries plus an 80Nm range ring are commonly entered in the FIX page, as an aide memoir for making the call well in advance to the next FIR.