SEMGURU – A Web 2.0 Blog

If you want to reduce the amount of memory used by Firefox in Windows here’s a little trick:

Firefox Memory Optimization

• Open Firefox browser, go to address bar, type about:config and hit enter
• You’ll see a page full with text under 4 columns: Preference Name, Status, Type, Value
• Right-click anywhere on that page and select New -> Boolean
• You’ll get prompted to enter a Preference Name – enter this:config.trim_on_minimize and hit enter
• You’ll be prompted for a value – select True and hit enter
• That’s it – close Firefox and open it again!

Now, whenever you minimize your Firefox, the amount of memory used will be reduced to approximately 20%.

If you want to test it yourself, follow these steps:

• Open Task Manager (CTRL+ALT+DEL)
• Load several pages into Firefox and watch the memory usage (going up)
• Minimize Firefox and see what happens!

Enjoy!