The Tab Heaven add-on for Google Chrome does the following:

• Limit the number of tabs you can have open at a time.
• Pin tabs to ensure you will never get an overcrowded view.
• You can use hotkeys to access your most recently viewed tabs.

The Tab Heaven extension is useful for people who have thousands of tabs and want to ensure that they don't get a crowded view when they browse the internet. It is useful for people who use other websites and apps regularly, as well as those who use a lot of email and social networking sites.