Chrome: Most of us tend to have a lot of tabs open. If you use tabs as reminders, Tab Snooze is an extension that makes managing that a little easier.
Tab Snooze allows you to "snooze" tabs until you need them. For example, if you're keeping a tab open to read later, you can snooze it for a couple hours so it disappears, then pops up again later. You can these reminders for just about any duration you want. It's not a perfect solution to managing tabs, but if you use tabs like a to-do list, Tab Snooze makes managing all that easy.
Tab Snooze [Chrome Web Store]