To sign out of Chrome:
1. Hit Alt to throw focus to the Chrome menu button, but not expanding it.
2. Left arrow until you land on the person logged in, usually this is a single left arrow.
3. Hit Enter to expand, then tab to Sign out.
Whoever was signed in under Chrome is no longer.
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
To think is to differ.