The Great Suspender is a Chrome extension to let you manage when tabs should be put “to sleep” or suspended. The extension allows you to automatically suspend specific tabs that aren’t in use after a set number of minutes. 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. It’s really hard to manage so many tabs on Chrome and Firefox too and worse still is the obstruction in the performance of your computer.
Source: https://thehackernews.com/2015/06/chrome-browser-fast.html