YouTrack Tweaks от Max Erekhinskiy

Tweaks in this release:

Agile Board Custom Fields: add indicators for any set of custom fields to the lower-right corner of the card. You can use a single configuration for any card size or use different configurations for each view.
You can also control how to display the value that is assigned to the field (full name or first letter only) and disable the colour scheme.

Agile Board Desktop Notifications: triggers native desktop notifications when new issues are added to the board. You can specify filters to send notifications based on the values in custom fields. For example, send notifications only when the value for the "Type" field is "Bug".

You can use a substring pattern to run tweaks for specific URLs. This lets you limit the application of tweaks to specific instances of YouTrack.
For Agile Board tweaks, you can enable tweaks for specific boards and sprints.