TooManyTabs - Ever tried having 20 tabs or more open in Chrome?
Toby - Better Than Bookmarks
Dustman - Firefox extension to close unused tabs.
Session Buddy - Manage Your Browser Sessions
Pocket - When you find something you want to view later, put it in Pocket.
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.