At the moment, it's the same as image-x-ico, which does make sense that it has the Windows logo in there. This is especially important as it's what Kirigami defaults to: https://invent.kde.org/frameworks/kirigami/-/blob/master/src/icon.h#L228
based on the VDG chat discussion, here so we have it here as well: the mimetype image/x-icon is not "a generic icon" but specifically one based on the microsoft icon spec used for windows icons (and favicons in IE/Edge), so it makes sense to have a windows logo in it. Software wanting a "generic icon" graphic or icon should use that instead of the image/x-icon mimetype. If such a graphic is currently not available, it could be created. I'd recommend not changing the mimetype icon for image/x-icon.
A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kirigami/-/merge_requests/414
Git commit ef1bd0b05b22f146e9555bb496c64747e63cd564 by Aleix Pol. Committed on 03/11/2021 at 15:11. Pushed by apol into branch 'master'. Icon: Use icon-png as the default placeholder instead of icon-x-icon That referred to png icons which is a bit confusing. It could make sense to have an ad-hoc placeholder icon. M +1 -1 src/icon.h https://invent.kde.org/frameworks/kirigami/commit/ef1bd0b05b22f146e9555bb496c64747e63cd564