NoScript

If you are a Mozilla user, NoScript is a great choice to enhance your PC performance.

NoScript is a free plug-in which will allow you to decide what is going to run when a webpage is opened.

Thanks to NoScript you will be who decide if the JavaScripts, Macromedia Flash,etc are going to run or not. You can even block the routines of other plug-ins.

From now on and thanks to NoScript your hours in internet will be a pleasure, not only because you will see only what you want, but because you will navigate highly safe.

Between its features you will be able to create several of groups and decide if the webs inside them can show scripts or not.

And all this for free.