direct links to specific user comments ... with firefox-Browser
if your are not familiar with HTML-Code ... it is maybe too difficult
I describe the steps to get a direct link to a user comment
in the FireFox-Browser
sample-link is: http://www.duolingo.com/comment/209688$comment_id=209846
the only difficulty is to get the "comment_id"
the next three pictures are describing the steps
(01): first you have to select the text
important: you have to select the Reply-Text of the previous user comment
... to get the nested-comment-id
(02): select the menu ("Auswahl-Quelltext anzeigen")
(03): search ( CTRL+F ) id="nested-comment-
(04): this number is the "comment_id" ... here ( 209846 )
(05): to be sure that's the right number
scroll the window until the link of the user appears
[a href="Katherle" title="Katherle" ...