FireFox Tweak.

I only know one tweak that very helpful. if you see when you minimize firefox and you check it memory usage in Windows Task Manager then in processes tab. It around 22,600 - 23,032 K or higher. But you can decrease it but tweaking it.

1. Open your firefox web browser.
2. In address bar type in about:config.
3. Then right click on empty space and go to New and click Boolean.
4. Enter the preference name config.trim_on_minimize and set it to true.
5. After done all the step above, restart your firefox browser by exit,open it again and minimaze it.
6. Check your mem usage it must be around 4,000 - 5,568 K.