safari won

1. Startup in Safe Mode:    https://support.apple.com/en-us/HT201262

    Login to your account.

    Launch Safari and test.

    To exit Safe Mode, click  in the menu bar and choose “Restart”.

Launch Safari holding the Shift key down.

For more help click the embedded links in the article.

2. If this doesn’t help:

      Download EtreCheck, run it to see if there is any adware installed or not.

      https://etrecheck.com

      Click  “Free download” button,

      Open Downloads folder, click on it to open, and then select ”Open”.

      “Choose a problem” from the popup menu box, and then “Start EtreCheck” in the dialog.

      Click “Share Report” button in the toolbar, select “Copy report” .

      Paste the report when you reply.

Are you running any anti - virus programs? Using a VPN?

Try setting up another admin user account in System Preferences/Users & Groups to see if the same problem continues.

Isolating an issue by using another user account