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Disable Safari Web Previews

Safari is a great browser, however the 4th version added a "feature": it takes png screenshots of every web page you visit.

This have two issues, at least for me: privacy and disk space.

To disable this feature open a terminal and write:

defaults write com.apple.Safari DebugSnapshotsUpdatePolicy -int 2

Close and restart Safari. Click on Safari menu at the top and select Reset, be sure to check 'Remove all webpage preview images', execute.

To restore the default settings quit Safari and write in terminal:

defaults delete com.apple.Safari DebugSnapshotsUpdatePolicy

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