Anime History
This script highlights the current episode being watched as well as all previously watched episodes for a given show.
Tested on Firefox 49 and Chrome 54 (with Tampermonkey).
Version history
Legend:
+ added feature
* changed feature
- bugfix
2.0:
+ Google Chrome Support (must use a scriptmanager, like Tampermonkey)
* Changed styling to be more noob friendly
+ Added some smaller quality-of-life improvements
1.5:
+ Added capability to edit history
Roadmap
- Make history account-bound
- (In a possible future) Fetch series meta data from myanimelist (or equivalent)
Known issues
If you're on Google Chrome and after the update it doesn't work, re-installing Tampermonkey seems to fix it (sorry, but Chrome just isn't as good handling userscripts).