Tab Snooze

Tab Snooze is a browser extension that closes unnecessary tabs and makes them reappear when you need them.

The extension lets you put off tabs until later and returns them to your browser automatically, so you can focus on what's important now. When it's time for a tab to wakeup, it will automatically reappear in your browser. A desktop notification will let you know it’s back, and your awoken tab will stay marked as new until you get to it.