On an entirely unrelated note, I wrote a Python 3 version of the follow script for fanfiction.net I published here a while ago. You can find it
here -- same warnings as the last time apply, use at your own peril (I have no clue what fanfiction.net thinks about this, so it might get your account banned, although I doubt it). Dependencies are BeautifulSoup 4, click, PIL or Pillow and the requests library. The only real advantage is that this is potentially faster and doesn't require any third-party browser to be installed.
@firefoxxy Sorry I can't help out with your problem, my configuration looks nearly identical and it works for me.