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!