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.
Lists of marked comics and subs is stored locally on your PC. That means if you wipe your locally stored data for the browser the list gets wiped. There is a barebones import/export for these in the settings if you wish to make a backup. To export, simply copy paste (CTRL+A is helpful) the data anywhere you wish to store it. To import, paste the data in to the textfield (make sure it's empty first) and press "Import". I'll make it fancier and a bit easier to use at some point. Does not yet backup blocked tags!
All features are optional. You'll find the settings in the site's own settings section: