As is not uncommon with good old FF; I've heard nothing from them so far, however I have found buried in their tweets & replies confirmation that this is policy in response to their recent problems with (I'm assuming the Korean) spam.
Needless to say the following requests appear to have fallen on deaf ears. I'm not on twitter myself, but if you are and would like to complain, they do at least appear to be resonding in some form to that, if not to e-mails
@FictionPress Complaint: My profile isn't showing the links I have on it but when I looked to see the problem, the links are still there!
9:03 pm - 19 Jun 2015 · Details
@aaustin0328 We have enabled white-listed linking protection due to influx of spam. Current white-list: google, facebook, twitter, flickr.
12:13 am - 20 Jun 2015 · Details
@FictionPress So I can't show my links temporarily or for good? @FictionPress Well, will they ever show up again or not? @FictionPress Please consider re-enabling DeviantArt (image storage) and TVTropes (analysis) links. Thank you. @FictionPress Can you please add tumblr and Archive of our Own to the list? And Can announcement on the main site would he helpful.Thanks!
If I was being cynical (and I am) I would suspect that, now they have the excuse, we won't see them back.