How to disable Top Sites in Safari on macOS Lion

I found this somwhere else which may solve your problem:

  • Quit Safari

  • Open Terminal (Applications/Utilities) & paste:

    defaults write com.apple.Safari DebugSnapshotsUpdatePolicy -int 2
    

    then hit return & quit Terminal.

To reactivate:

defaults delete com.apple.Safari DebugSnapshotsUpdatePolicy