[alexanderby]

Chromium team fixed this issue by showing theme background color by default. So you should install some dark theme, e.g. this one https://chrome.google.com/webstore/detail/material-incognito...

Also if you download Chrome Canary and launch it with --force-dark-mode flag, you will get early access to built-in dark mode.

[MrBra]

Thanks a lot! I installed it in regular Chrome and no more white flashes! Don't know why I did not think about themes... :\

[MrBra]

Update: dark theme does not completely remove the flash but it makes it last so short that it doesn't really affect me. Happy enough for now :)