One click install:

Add to Mihon/Tachiyomi/Komikku's

If the button doesn't work, go to Settings → Browse → Extension repos and manually add https://raw.githubusercontent.com/komikku-app/tracker-extensions/repo/index.min.json

TachiyomiAZ:

1. Go to Settings → Browse
2. Tap on "Edit repos" and then "Add" button at bottom
3. Input komikku-app/tracker-extensions
4. Enjoy!

If you're not using any of the above, download and update extensions from the listing page.