Mine

this is in the config.ds:

(debug)

(if (is (application_name) "Firefox") (set_workspace 2) (set_workspace_3))


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sebastian@wavemaster:~$ devilspie -d
Devil's Pie 0.17.1 starting...
Loading /etc/devilspie
/etc/devilspie doesn't exist
Loading /home/sebastian/.devilspie
Loading /home/sebastian/.devilspie/config.ds
Window Title: 'sebastian@wavemaster: ~'; Application Name: 'sebastian@wavemaster: ~'; Class: 'Gnome-terminal'; Geometry: 657x412+6+51
Window Title: 'XChat: sebrock @ FreeNode / #ubuntu (+tncLfJ #ubuntu-unregged 3,4)'; Application Name: 'xchat'; Class: 'Xchat'; Geometry: 1086x744+144+119
Window Title: 'gdesklets-daemon'; Application Name: 'gdesklets-daemon'; Class: 'Gdesklets-daemon'; Geometry: 189x76+0+948
Window Title: 'gdesklets-daemon'; Application Name: 'gdesklets-daemon'; Class: 'Gdesklets-daemon'; Geometry: 678x80+297+944
Window Title: 'Desktop'; Application Name: 'File Manager'; Class: 'Nautilus'; Geometry: 1280x1024+0+0
Window Title: 'Top Expanded Edge Panel'; Application Name: 'Top Expanded Edge Panel'; Class: 'Gnome-panel'; Geometry: 1280x26+0+0