We all know our all browsers are memory eaters especially Chrome, Firefox. So when we open the more no of tabs and using more no of time everyting slows down and sometimes its crashes the browser, The worst part of this is it would affect the performance of the system as the tabs continue to run background processes and feed on your system's memory.
Chrome have a great tool to solve the issue without any headache,
The Great Suspender gives you the option to suspend specific tabs manually as well while keeping them available in your tab bar.
Meanwhile, you can also add any site (such as Gmail, Facebook and so on) to a "whitelist" which will prevent certain pages from suspension no matter what.