You will need to install a user script manager extension to install this script.
Comics marked as read are partially faded out with a "READ" tag on the bottom right of that comic.
You can mark comics as read/unread on the main comic info page for that comic.
You can now subscribe to artists or groups. Currently all this does is list subscriptions on a new subscriptions page and highlight subscribed tags.
By clicking "Find Alt Versions" on the thumbnail of any comic, alternative versions of said comic get searched from the entire site and grouped in with it. i.e. different language versions of the same comic in most cases.
This relies on titles so it isn't perfect. Occasional false positives or missing matches are possible.
You can now remove all comics tagged with blocked tags from all listings by clicking on the block icon on any tag. To unblock, simply click the same button on a blocked tag or from the settings page.
Allows you to zoom below 1.0 and moves in 0.1 increments
Lists of marked comics, blocked tags, subs and settings are stored in your browser's local data. Meaning if you wipe your browser, this data too gets wiped. There are import/export buttons for NHentai Improved's data below the settings, so you can make backups if you wish.
All features are optional.
You'll find the settings in the site's own settings section.
(tested and working on Firefox and Chrome)