Lately, I cannot add nor remove bookmarks on file chooser dialog on KDE neon 5.11 GNU/Linux. This problem is annoying as I must manually navigate to deep directories each time. If I add one bookmark, new window won't show it; if I delete one, new window will still show the deleted one. In case you don't know, file chooser dialog shows whenever we click "Open File" or "Upload/Download" button while browsing the net. In short, I find out this is because wrong permission on a certain file of GTK2 in my $HOME directory. To fix this:
1) Find this directory: ~/.local/share/gtk-3.0/
2) Delete the file named bookmarks there
3) Now browse the net and try to open the file chooser dialog and try to add/remove bookmarks
Big thanks to Matthias Clasen (one of the respected developers of GNOME and GTK+ itself) for pointing out the clue at GitHub!
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