1. Safari

  • Open Safari Preferences. Go to "Extensions" tab 
  • Disable the "Landslide Search" extensions and click on Uninstall button
  • Click 'Show in Finder' to go to the location of the application
  • With the extension disabled, delete the application.
  • A restart may be required

2. Chrome
  • Open Chrome. Go to chrome://extensions.
  • Find the Landslide Search extension and click "Remove"