U-Thunar ungumphathi wefayela we-Linux nezinye izinhlelo ezifana ne-Unix, ezibhalwe ekuqaleni kusetshenziswa ikhithi yamathuluzi ye-GTK+ 2 futhi kamuva zafakwa kukhithi yamathuluzi ye-GTK+ 3. Iqale ukuthunyelwa nge-Xfce enguqulweni engu-4.4 RC1 nakamuva. I-Thunar ithuthukiswe ngu-Benedikt Meurer, futhi ekuqaleni yayihloselwe ukuvala i-XFFM, imenenja yefayela yangaphambilini ye-Xfce. Ekuqaleni ibibizwa ngeFiler kodwa yashintshwa yaba nguThunar ngenxa yokushayisana kwamagama. I-Thunar yakhelwe ukuqala ngokushesha futhi iphendule kangcono kunabanye abaphathi bamafayela e-Linux, njengamafayela e-GNOME ne-Konqueror. Ukufinyeleleka kufezwa kusetshenziswa i-GNOME Accessibility Toolkit. Njengayo yonke i-Xfce, i-Thunar yakhelwe ukuthobela izindinganiso, njengalezo ezishiwo ku-freedesktop.org. I-Thunar ilula futhi ilula ngokuklama, kodwa ukusebenza kwayo kunganwetshwa ngama-plugin.