How to remove Bing from OS 10.15.1 and Safari 13.0.3

There is adware installed your Mac.

 1. Run  the latest release of Malwarebytes for Mac to remove malware/adware installed on your Mac.

     Install guide:       https://support.malwarebytes.com/docs/DOC-1817

     Uninstall Guide:  https://support.malwarebytes.com/docs/DOC-1190

     Click the “Scan Now” button.

     Repeat the scan couple of times.

     Once done quit Malwarebytes for Mac.

     Restart the computer , relaunch Safari holding the shift key down.

2. Additional steps, if necessary.

 1. Remove unknown and third party installed extensions, if installed. 

     https://support.apple.com/guide/safari/use-safari-extensions-sfri32508/mac

 2. Reset search engine.       https://support.apple.com/guide/safari/customize-your-search-ibrwe75c2a3c/mac

 3. Reset Homepage.            https://support.apple.com/guide/safari/set-your-homepage-ibrw1020/mac

 4. Restart the computer, relaunch Safari holding the shift key down.