Freddy works similar to the original FNaF 1, where she won't move if you look at her camera specifically. She also will never go backwards or reset, so once she gets to your door she stays there. Just look at her every so often, learn her path, and be aware that her laughing means she just moved.
she actually does go backwards, you just have to wait for her giggle and she moves back and fourth between cam 3 and 6. when shes at cam 6 just keep the door closed until she moves back to cam 3 at least thats how she acted on my runs
