You can read the comic that explains some of the reasoning here: https://www.google.com/googlebooks/chrome/big_00.html https://www.google.com/googlebooks/chrome

You can read the comic that explains some of the reasoning here: https://www.google.com/googlebooks/chrome/big_00.html https://www.google.com/googlebooks/chrome/big_00.html IIRC one of the biggest reasons was a single misbehaving tab in Firefox being able to take down the whole browser.