VULNERABILITY DETAILS
I really don't know if this is really a Browser Security issue, but I think is a vulnerability for sure. I was able to bypass the password storage on the browser and send the password via Slack. The chrome browser inputs the passwords on the fields, and I could extract it via console. 

VERSION
Chrome Version: 69.0.3497.92 (Official Build) (64-bit)
Operating System: [Windows 10 Full patched]

REPRODUCTION CASE
I recorded my screen while my Arduino Rubber Ducky ran the exploit on the browser, I made the shortest video possible.

Thanks in advance,

Omayr
 

Deleted: 2018-09-16_04-15-54.mp4 2.7 MB

	2018-09-16_04-15-54.mp4 2.7 MB View Download

Deleted: Screenshot_20180916-041628~01.png 138 KB

	Screenshot_20180916-041628~01.png 138 KB View Download

Deleted: Screenshot_1.jpg 217 KB

	Screenshot_1.jpg 217 KB View Download