a0494a2a_ng__404_Not_Found_Error__Files__Category
[Comments and examples] Favicon images may be requested automatically by web browsers and used in the address bar and to help visually identify bookmarks; multiple file names and extensions may be requested until a valid file is found. /apple-touch-icon-precomposed.png /apple-touch-icon.png /favicon.ico /favico.ico /favicon.png /favicon.bmp [Category] 
Favicons
Benign Unexpected URLs - Part 1 - Missing (404 Not Found Error) Files