If you click on the comment directly ( https://news.ycombinator.com/item?id=30262341 https://news.ycombinator.com/item?id=30262341 ) you can click the favorite

If you click on the comment directly ( https://news.ycombinator.com/item?id=30262341 https://news.ycombinator.com/item?id=30262341 ) you can click the favorite link. That will then let you find it via https://news.ycombinator.com/favorites?id=somethingAlex&comments=t https://news.ycombinator.com/favorites?id=somethingAlex&comm... (which is private) which can be found on your profile page.