Firefox maybe the best web browser out in the internet but it isn’t bulletproof when it comes to the memory leakage usage. More the windows, tabs, extension it sucks more memory. Fortunately there is a small fix that will minimize the memory leakage to some extend. Don’t bet it will fix it forever, still better to have something rather then a zero.

Heres what you do:

1. Open Firefox and go to the Address Bar. Type in about:config and then press Enter.
2. Right Click in the page and select New -> Boolean.
3. In the box that pops up enter config.trim_on_minimize. Press Enter.

4. Now select True and then press Enter.
5. Restart Firefox.