Yesterday, I install chrome 78.0 on Ubuntu 16.04. Everything works fine before I close Chrome.
After I reopen Chrome, I’m automatically logged off all sites (facebook, google, chatwork, …).
After searching for a while, I realize that my problem is that I had a corrupt Cookies file. So just delete google chrome cookies file and all will be ok :D
Just open terminal and run this command:
rm -rf ~/.config/google-chrome/Profile*/Cookies