Hello @Ruan_de_meneses and welcome to the forum 
This feature has already been asked for in this topic here:
Stabilizer on Freehand Selection Tool
The developers will work on it when they get the time to work on it and when anything they decide to be more important has been completed.
I suggest that you remove your vote from your topic (this one) and go to add your vote in the topic linked above. That’s all you need to so.
I’ll close this topic now so as to not cause further confusion.