Recently Used Tabs Indicator от Sverre Johann Bjørke

A Firefox extension that tracks your 5 most recently used tabs and adds visual indicators to their titles, making it easy to spot and switch back to tabs you were just using.

Choose from these built-in styles:

• Simple Numbers: [1] → [2] → [3] → [4] → [5]
• Colored Circles: 🔴 → 🟠 → 🟡 → 🟢 → 🔵
• Colored Squares: 🟥 → 🟧 → 🟨 → 🟩 → 🟦
• Moon Phases: 🌕 → 🌖 → 🌗 → 🌘 → 🌑
• Custom: Define your own 5 indicators

Permissions

This extension requires:
- Access to all websites - Needed to modify tab titles. The extension only reads document.title and adds a prefix indicator - it does not access any other page content or data.
- Tabs - To track tab activation events
- Storage - To remember your indicator style preference