Google settles 'Incognito' lawsuit: Agrees to delete millions of browsing records.
Google will delete "billions" of private browsing data records as part of the settlement.
Users in 'Incognito' mode to block third-party cookies for five years under the settlement.
No monetary damages: Individuals can pursue complaints against Google in state courts.
Plaintiffs' lawyers hail settlement as "groundbreaking" in transparency demands.
Landmark federal antitrust trial alleging Google's monopolization of online search market continues.