How to force Firefox to release its memory?

Firefox 3.0 offers a series of optimizations. But his memory remains high, which can disrupt the functioning of other applications if you're the type that many programs open simultaneously.Here is a trick that forces Firefox to release its memory every time you iconified in the taskbar ...

When iconified Firefox to return to work on other applications, it is no longer a vital need to occupy as much memory and it does virtually nothing.A setting allows you to release as much RAM as possible as soon as the Firefox window is iconified and until it is reopened.

1. Open Firefox 3
   
   
2. In the address bar, type about: config and press by [Enter]
   
   
3. Click It promised, I will be careful!
   
   
4. Click the right mouse button anywhere in the list Select New and then Boolean value
   
   
5. Enter the name of option config.trim_on_minimize
   
   
6. Click OK
   
   
7. Select true
   
   
8. Click OK
   
   
9. Close Firefox.

Good trick but I think it will risky to do.