FilterIdea app what is it? Safari quits then this green filter idea icon shows up in the bar.It seems to be in my apps and in Safari extensions but I can't seem to get rid of it my dragging it to the trash.

 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 please.

     Once done quit Malwarebytes for Mac.

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

     Remove unknown profiles (1), unknown extensions(2), reset search engine (3) and reset Homepage (4 & 5)

     listed under Additional steps.

2. Additional steps to take, if necessary.

  1. Remove unknown profiles.

      System Preferences > Profiles

      Open System Preferences, click the “Profiles” icon ( a checkmark on a gear) .

      When Profiles pane opens, select the unknown profile and click the minus button at the bottom.

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

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

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

   5. Ref: https://forums.malwarebytes.com/topic/236261-how-to-remove-weknow-malware-and-others/

   6. Shutdown the computer from  menu. Start your Mac using the Power button.