Is your feature request related to a problem? Please describe.
I find it highly unintuitive that importing ffn is overwriting the currently set matplotlib style by the user.

Describe the solution you'd like
I would suggest to remove the try-except block in ffn/core.py following line 23:

try:
    import seaborn as sns

    sns.set(style="ticks", palette="Set2")
except ImportError:
    pass

Instead, if the user wants to change any matplotlib settings, it should be the user doing it consciously and not be influenced by the order of importing.