This extension modifies the Gitlab milestone view to group subtasks with their respective parent tasks, if found. This makes a milestone which includes both subtasks and parent tasks more structured and easier to understand.
In addition it highlights in-progress tasks.
Disclaimer: This is a bodge which may not hold up against the ever-changing markup of the Gitlab UI. Expect this to stop working at any moment. I'm not committing to bodging it again when it breaks.
Before:
After:
- Navigate to
about:debugging#/runtime/this-firefox - Click "Load Temporary Add-on"
- Select any file within the extension folder
- Navigate to
chrome://extensions/ - Click "Load unpacked"
- Select the extension folder

