Option "Recognize not only by extension" for Viewer

[Mixer]

XnView 2.34
Browser has option "Recognize only by extension" for File list. When it is unchecked, XnView in Browser mode inspects every file in folder and finds pictures even if their extension is wrong or missing. Then user can press Enter on some picture file and switch to Viewer, where he can view every picture file found by Browser.

If user double clicks picture file in the same folder in Windows Explorer and it is opened straight in Viewer, user won't be able to see picture files with strange extensions or picture files without extension while scrolling through folder contents (at least until he switches to Browser and back to Viewer). Can be implemented feature of Viewer for trying to load every next or previous file in folder?