If there are a lot of Tab opened while you use browsing using Mozilla Firefox then it is very likely that there may be the maximum memory consumed the Mozilla Firefox itself. Thus affecting the performance of many other applications. In such a situation RAMBack a free Firefox addon can be the best solution. It promises to take care of this by issuing an internal notification to free up memory that is otherwise held for performance purposes.
I hope you would like to test it by your own then click the link here and get back the best result…. do not forget to make a comment how it has worked?
Worked great on my Firefox 3.6 reduce around 40,000k, thanks