Created attachment 9825 patch to remove suffix (Followup of Bug #16778) Appending that sting does not add info .. from the taskbar icon it is anyhow clear that it is a file-manager. Besides that, on most folders the suffix is truncated. Most other Linux File Managers dont have a suffix. Only dolphin uses "-- Dolphin" as suffix. We could changing the suffix to "- Thunar", which would allow to differ between different file-managers if multiple are used at the same time. Though I dont think that is a realistic use-case .. so I would rather just drop the suffix.
Pushed to master ... forgot to link the commit :F https://gitlab.xfce.org/xfce/thunar/-/commit/fffa7f2ac7adbfd14151bdffd7e47b9f81ba0ed1