https://www.theregister.co.uk/2018/05/31/chrome_67_adds_site_isolation_to_mitigate_spectre/ > Enhanced Spectre-protectors will soon come to the Chrome browser, as its desktop stable channel hit version 67.0.3396.62 and upgrades for Windows, Mac and Linux have started to flow. > The Spectre mitigation comes in the form of enhanced site isolation, first introduced in Chrome 63, in which pages from different sites run in sandboxes that block them receiving sensitive data from other sites.