I would say the main thing that has made FurAffinity my preferred furry art site isn't even a part of FA itself, but the Firefox add-on "FA Extender." (I won't link to it but it's easy to find via Google).
The only thing I use it for is its download functionality, in which it places an extra download link on a submission page, which when clicked, will not only save the image to pre-determined folder on disk, but also, most importantly automatically places it in a sub-folder named for the artist's username (creating the folder if it doesn't exist).
This specific functionality of FA Extender has been crucial in my ability to keep up with all the great artists I follow, for collecting their works into an organized folder structure locally. I can't even begin to guess the amount of time it has saved me from navigating through folders in save windows. For people who follow many artists, those seconds can really add up over time.
I know this is not possible to implement as part of the site itself, due to the requirements of it interacting with the user's local file system (which some may perceive as a security risk but as a browser add-on it would be entirely the user's choice whether to install the add-on or not, and I'm sure it would be discovered fairly quickly if there were some problem with it.) I also believe that the specific download functionality I am talking about is currently only possible with Firefox, and not Chrome.
But this is a request to see if perhaps FurryNetwork would be willing to put resources into developing such a browser add-on for FN officially. I know it would entice many users of FA Extender (of which Mozilla lists there being over 1,500) to be more active on FN, myself included.
Thanks for reading!
Customer support service by UserEcho