VULNERABILITY DETAILS
When using Chrome's autofill feature for password logins the password can be 
seen by anyone if they use dev tools (inspect) to change: input type="password"
to something else, for example input type="anything".

VERSION
Chrome Version: 60.0.3112.90 (Official Build) (64-bit)
Operating System: Windows 10

REPRODUCTION CASE
1) Go to a sign in page that has a hidden password autofilled out.
2) inspect the password field 
<input type="password" id="ap_password" name="password" tabindex="2" class="a-input-text a-span12 auth-autofocus auth-required-field">

3) change the type from "password" to something else
4) you will now be able to see the password. 

FOR CRASHES, PLEASE INCLUDE THE FOLLOWING ADDITIONAL INFORMATION
N\A