CleanTabs od Matthias Hübner

CleanTabs - Free up memory with a single click
Is Firefox running slow due to too many open tabs eating up your memory? TabCleaner solves this problem instantly!
How it works:

Click the trash icon in your browser toolbar to free up memory from inactive tabs
Your tabs stay open and reload when you need them
Simple and effective - no complex configuration needed

Perfect for:

Power users with many open tabs
Laptops and PCs with limited RAM
Anyone who wants to keep Firefox fast and responsive

Install, click, done - boost your browser's performance today!