Linux native file dialogs are currently disabled by default. As I understand it, this was because they weren't very nice a few years back and so the JFileChooser was a safer choice. However, Linux has moved on, and they now look very nice,

certainly much better than JFileChooser, which has layout issues, crude folder navigation, no access to user's favorite/often used folders, and so on.

So please can you change the Linux default?
To confirm, the screenshots are the result of changing just the preference, with no other tinkering, on GNOME 3 on Debian.
This also applies to PApplet.useNativeSelect.
I'll have to take your word for it, but will change the default to use the native chooser for 3.3.5.
For current installations, change chooser.files.native in preferences.txt.
I'm happy about this change. The native one is much more usable. Keyboard navigation works too! :)
Great! Thanks for letting me know. (It's rare that I hear about it when things are working or people are happy!)
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I'll have to take your word for it, but will change the default to use the native chooser for 3.3.5.
For current installations, change
chooser.files.nativeinpreferences.txt.