Comment 4 for bug 988788

Not sure how many users actually care about this ...
I guess you're not allowed to create ~/.config/gtk-3.0/bookmarks file when a user account is created?
If you could then same could be achieved by, - Ex. here

file:///home/doug A New Window
file:///home/doug/Documents
file:///home/doug/Music
file:///home/doug/Pictures
file:///home/doug/Videos
file:///home/doug/Downloads