Raindrop.io - All your articles, photos, video & content from web & apps in one place.
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.
LinkAce - A selfhosted bookmark manager with advanced features.
Tree Style Tab - Tree Style Tab is an all-in-one Firefox extension that provides ability in order to operate tabs as a tree.
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.
Session Buddy - Manage Your Browser Sessions