I have a few userscripts and styles I have been working on for mangaupdates to share.

The userstyles are a work in progress since the site is quite big and has a lot of nooks and crannies.

• Vanilla Enhanced userstyle mostly just slightly adjusts the look and feel of the site and has an option for replacing the official banner with a rainbow. I drew a banner and some MU mascots to scatter around but I couldn't figure out a way around the CSP policy on the site with that besides using base64. (Speaking of... make sure to enable CSP patching in Stylus)
• iconFix updates most the site's icons or even changes [edit] buttons to—an edit button. I would package this with the other but import is also broken it seems and I wanna give people the option there

The userscripts say what they do on the tin.

• A grid view for seeing covers instead of lists in your "My Lists" page using the API and local storage for the covers so you aren't spamming the site with requests. (I recommend dropping the series shown on your lists to sub 100 for scroll-ability)
• An external links script that adds a couple search links above the manga description along with collecting official links from the description
• Cover Previewer does what the other popular cover hover script does but with the API and a shared storage with the grid script

My github page with the scripts & previews

Edit: changed the link to something for covering changes/known bug/more specific to my mangaupdates stuff. Also patched a little.

do do do nuts lets go nuts

Trying the cover hover one -- works great! Thanks for this :)

Quick edit: Removed issue, don't mind me, I'm dumb