There are a few potential problems, though - pagebugs can work whatever the platform as they're browser-related, and lots of programmes have automated checks for authentication of software or software update.
Little Snitch will give you the opportunity to stop them if you choose. In addition, use your firewall, and the hardware firewall on your router/modem to remove all possibilities of a problem.
But that may restrict your own surfing experience if carried out too strictly, so stay calm and use the available tools to optimise your web experience while keeping you as safe as is possible (and on this platform, that is
very safe).