Not that I know of, other than grabbing each chapter with something like curl or wget (change the /1/ in the URL to /n/ to get chapter n), processing it to extract the text, and concatenating them, and then sending that to your Kindle over USB or by mailing it to your Amazon "send to my Kindle" address.
If you change the www in the URL to m, you get the mobile version, which has less complicated HTML, which might make extracting the text easier.
You could also try reading it online in the Kindle browser. I have not tried reading anything from fanfiction.net there, so I don't know how well that works.
If you change the www in the URL to m, you get the mobile version, which has less complicated HTML, which might make extracting the text easier.
You could also try reading it online in the Kindle browser. I have not tried reading anything from fanfiction.net there, so I don't know how well that works.