The desktop file name specified in org.kde.konqueror.appdata.xml is org.kde.konqueror.desktop, but the desktop file is named as konqbrowser.desktop.
Please either rename the desktop file to org.kde.konqueror.desktop, or modify the metainfo file to match with the actual desktop file name.
Created attachment 129048 [details]
Fix for appdata
The attached patch could fix the problem I think.
Fixed by this merge: