Thread:Extension talk:Favorites/Option to tag favorites

Dunno how far your ambitions with the extensions go, but this might be a cool addition: tag your favorites (on action=favorite and or editable on Special:Favoritelist). An option would be to tag them only with existing category names (like the HotCat gadget on Commons) or to allow own tag names.

This would offer new parameters for the tag and could split the output of Special:Favoritelist.