Samsung
Delete Saved Passwords and Login Data auf Samsung
The Samsung Internet browser stores usernames and passwords automatically once you confirm a save prompt during login. This autofill data speeds up future logins, but it also causes problems when the stored details are outdated, belong to a shared account, or block a new login attempt on a form that keeps pre-filling wrong data.
Deleting this data resets the autofill behavior for every saved site at once. This is different from clearing browsing history or cache, since login credentials are stored separately in the password manager section of the browser settings.
To remove all stored access and login data, open the browser and follow this path: Tap on Internet ➔ Open the Menu ➔ Tap on Settings ➔ Tap on Usernames and passwords ➔ Tap on Personal data ➔ Tap on Delete ➔ Tap on Delete all.
After confirming, all saved login fields are cleared. The next time you visit a login form, none of the fields will be pre-filled, and the browser will ask again whether you want to save the new credentials.
If you only want to remove one account instead of everything, look for individual entries under the same Personal data section before choosing Delete all.