Firebrats like heat, while silverfish prefer humidity. A good way to tell the difference between the two is size and coloration. Silverfish are 1/2-1" in size and have a silver color, while firebrats are usually smaller than 1/2" and have a striped orange, brown, black appearance.

I have insects in my room. They are either silverfish or firebrats.

It's pretty hot here, my room temperature is between 29 and 31 C or 84-88 F

Which insect likes this temperature? Silverfish or firebrat?