I just noticed that the default favorites completely disappear once I add the first user-specific favorite.
Is this intended?
If so, is there a way to add “sticky” favorites which a user explicitly would have to remove?
Note that this extension is not a recommended extension and it’s not coded by the xwiki dev team. (https://extensions.xwiki.org/xwiki/bin/view/Extension/Favorites%20Application/).
@ludovic / @acotiuga : maybe you have some idea since you’re listed as authors 
Yes, I’m aware of that. Nevertheless it works quite well actually, and is a very helpful Extension!
The behaviour I asked about might even be intentional, I just wanted to ask about the thoughts behind it. 
And if it’s intentional, I’d have a feature request. (BTW, how to document this feature idea/request for unofficial Extensions? Still in JIRA, or shall I add a comment to the Extension page?)
Better in JIRA, this guarantees it’s not lost. Commenting in Extensions is not a great place.