[Looking for extension] FPS over milliseconds

Greetings, i’m new to animating on Aseprite. Recently i found out that it uses frame duration rather than frames per seconds. I’ve tried to check all the forum threads regarding the topic and even tried looking for extensions, but i couldn’t find anything. I found out about the 1000/FPS formula, but i want perfect FPS without rounding. Is there an extension that adds it?