Create, modify and quick change tab groups. Features:

• Full rewrite addon without any third-party libraries
• New Design (fork old addon design Tab Groups )
• Group colored icon
• Added the ability to import the backup groups of the old plug-in "Tab Groups"
• Added support of "Firefox Multi-Account Containers"
• Fully support multi windows
• Save last active tab after change group
• Show current used group in addon icon (see screenshot)
• Add sorting functional "Move group up/down" in group context menu
• Specially NOT supported Private (Incognito) Mode
• Added support switch groups thought keys:
  • Ctrl+1: go to prev group
  • Ctrl+2: go to next group
• Close tab by middle mouse click
• Support very simple switching between groups and tabs using the up, down, right and left keys, and in search mode too