In some macOS apps' menus, such as the History menu in Safari, you can see small images next to some of the menu items—in Safari's case, the sites' favicons appear in the History menu. But if you open Safari's History menu in Menuwhere, you won't see those favicons. Why not?

Menuwhere builds its menus using the Accessibility API, which is the only way to make Menuwhere do what it does. However, the Accessibility API cannot see those menu item images. And if the API can't see them, well, then neither can Menuwhere.