I was searching for such an addon for years. I finally found this. This is the best addon i have ever used. It makes watching Amine so much better. I really like it, that i always know which episode i have watched and what i need to watch next.

Dude I'm so proud of you! I have had this userscript for 2 years(I'm not sure but i think it's around that duration) and you've made it this great extension. I am so grateful for your work and I hope you keep making our life easier! Maybe a kissanime captcha solver? Hey I'm in no position to make demands, I just want to say thank you!

I am currently using the Firefox Nightly browser and
I'm experiencing a problem in regards to the UI
as provided in the link:
http://prntscr.com/l43joq

The UI is not shown as it was portrayed in the screenshot and an element is clipping through the text.

A similar problem is happening to when I browse over the episode selection and information portion of the anime and pressing the menu button as seen here:
http://prntscr.com/l43pko

From both of these, I can see a problem with the UI design failing to be displayed as seen in the screenshots.
I would give this 5 stars if this is fixed in the near future.

UPDATE: It finally works now!