With Vivaldi, you can store your account login credentials in the browser.
When password saving is enabled, every time you log into a new account you’ll be asked whether you wish to save the password.
If you ignore the prompt or say Never to saving a particular password but change your mind, next time you log into the account, click on the Key icon on the right side of the Address Field.
When you change an account’s password, you’ll get the same prompt asking whether you wish to update the credentials.
To filter passwords, search for the Website or Account Name in the search box above the list of saved login credentials.
To delete stored account credentials, click on Delete password (X), next to Show Password. To delete all passwords at once, go to “V” menu (on Windows and Linux) > Tools > Delete Browsing Data. Select Passwords (including your Sync login password) and for Delete data for: select All Time.
To import passwords from another browser, make sure the source browser is closed, then go to menu (on Windows and Linux) > File > Import Bookmarks and Settings. From the dropdown menu select the browser you wish to import the passwords from and decide on the data you want to import. Please note that import is not possible from all browsers.