Lower the RAM usage of Firefox
Filed Under (Firefox, Tweaks) by nipponzen on 09-09-2008
Tagged Under : about:config, Firefox, RAM
Have you ever noticed that when using Firefox and opening many tabs, Firefox eats up a lot of RAM, well
maybe its not true for people that have computers with 2 gigs of RAM. Anyway, here is a way to reduce considerably the use of RAM used by Firefox; when you minimize Firefox, it will free up some RAM, well, not some; A LOT.
Here it is:
- Start by typing about:config on the address bar in Firefox. If in Firefox 3, click on the “Promise, I’ll be careful” and promise you’ll be careful.
- Now right click anywhere inside the window and select New -> Boolean
- In the box that appears copy and paste
config.trim_on_minimizeand press enter. - Then select True and then press enter.
- Restart Firefox.
Now that you’ve done this, if you open up Task Manager and Firefox, try minimizing Firefox and see how much RAM is freed up. See for yourself!

