@quhno I don't know how to go to cookies. I tried chrome://settings/cookies and
chrome://settings/Cookies. I went through the regular settings menu to see all my cookies and it came up empty even though I have all cookies allowed.
As GwenDragon commented on that article, it will not work for Passwords and Extensions.
Also, the profile may be in a different folder; use Vivaldi menu Help/About to identify the correct path.