In a recent Chrome update, a new bell icon popped up in the OS X notification bar. You can disable this icon in 3 easy steps:
- Disable “Enable Rich Notifications”
- Restart Chrome
May 2014 update: It’s now called “Notification Center behavior”, and you must set it to “Never show”
There is also a very interesting flag, “Tab Overview”, that lets you swipe down to see your tabs like in Expose.