I have more than one user in Chrome Browser (chrome://settings/ Add new user) and can't find out how to specify a custom icon for each user. Chrome allow me select an icon from a list of icons set, but I want set my own image.
Google Chrome OS
If you are talking about changing a user account picture on Chrome OS (Google's operating system), a simple search will find that information for you on Google's Help site. Below is from the previous link.
Google Chrome Browser
To change an account picture on Google Chrome (the browser), follow the directions below:
At this time it is not possible to use your own custom picture in Google Chrome, but it is possible to use your own custom picture in Chromium as per this link. This Superuser question asked the same question, but at the time, the answer was "no". Now the answer is "yes", but only for Chromium.
Set to 'enabled' and relaunch. That will bring the new right-corner username menu with name instead of image. But now going back to the same address and setting that to 'disabled', then relaunching, will show the Google account user image instead of the avatar, or that image will become available among the avatar images.
(It's like a bug: going directly from 'default to 'disabled' will not work. You have to go from default to enabled, relaunch and then disable and relaunch.)
Chrome Browser, Version 46.0.2490.86 m
Chrome will detect your general Google account picture and import it as the first image in the icon line up. See below...
However, if you didn't have this image already set when you "added" your account, then you will have to simply "remove" your account and add it back in. Obviously, if you don't have a general Google account picture set, then there is nothing to grab and you must create it, first.
What is meant by general Google account picture, i.e. the picture associated with your e-mail, Google+, etc.
Hope this helps, cheers!
Once the image is in place there seems no way to change it with a different custom image. FRUSTRATING!
However, on a Mac, navigate to
Relaunch Chrome and witness the change in the top right User menu. Regarding the old image, rename it with a different character in front so it's not used but you can switch back if the new one's size is wonky.