Greasy Fork is available in English.
Avatars + relative timestamps on your own /userXXXX page. PM panel: swap flag → photo, add flag emoji, user avatar, relative time, proper hover previews, and show latest comments in comment notifications. Likes list: show plate PNG; tooltip preview gets car logo+model and live likes; comment count loads on 1s hover.
This script will do the following in the 'Notifications' and 'Private Messages' sections of your Platesmania profile overview:
Show user's profile pictures next to their usernames.
Change the date stamp next to notifications to relative time. (e.g. 01/01/2000 01:00:00 AM -> 2h ago)
Show preview of picture in "Private Messages" box
Show comment contents on comment notifications (in the private messages box)
Show plate informer instead of text in the notifications
Show make & model when hovering a notification's plate informer image (shows manufacturer as a logo if available), as well as likes/comments
Show the number of new notifications since last visit
Auto-Load more notifications when scrolling down (infinity-scroll)
The script uses an integrated caching system to keep requests to the server at a minimum. Only new content gets fetched on reload.
Still, you might face the error page "you are being rate limited" from time to time, especially when a lot of new notifications came in. That's due to how strict PM reacts to automated requests. It usually takes 10-15 seconds of waiting until it works again.