I don't really know, before Firefox I used IE, but then switched to chrome and never been happier with my browser. Internet Explore sucked, big ass bar, trying to open a tab was a *****, this was before 1.9, and I still think with all the improvements I won't go back. It was mostly laggy and took way to long to open a page, firefox had a better bar, but had some lag issues, not as much but still some. Chrome did everything I wanted and I really like it.