Safari Issues

Press and hold the shift key when launching Safari. If it launches, then you may have an incompatible extension that would otherwise load without pressing the shift key. Probably a good time to Clear History… : all history : too.

   Check for adware.

     Use  the latest release of Malwarebytes for Mac to remove malware/adware, if installed on your Mac.

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

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

     The installer may ask you to allow it in Security & Privacy  /System Preference. Allow it.

     Click the “Scan Now” button. Once done quit Malwarebytes for Mac.

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

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

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

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