Open Tabs Next to Current
Tabs Outliner
Tab Utilities
Tree Style Tab
Duplicate Tabs Closer
Tab Tally
Adguard AdBlocker
Tab Stash
Simplified Tab Groups
Simple Tab Groups
Panorama View
Tree Style Tab
Firefox Multi-account Containers
Tiled Tab Groups
Tab Workspaces
Conex
Open Tabs Next to CurrentTabs Outliner - Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.
Simple Tab Groups - Create, modify and quick change tab groups. Features:
Tab Utilities - Tab Utilities is an ultimate tab solution for all kind of users who want to manage their tab, create multiple session and search for new tabs, etc.
Panorama View - Tab Groups with Panorama View. Lets you easily Group and manage Tabs visually, with tab hiding.
Tree Style Tab - Tree Style Tab is an all-in-one Firefox extension that provides ability in order to operate tabs as a tree.
Duplicate Tabs Closer - Detects and automatically closes duplicate tabs.