Stealther is a Firefox extension that temporarily disables the Firefox web browser from recording any page history, cache files, cookies, downloads, form information, or headers. The result is that you can surf the web privately, knowing that none of the information is being saved to the hard drive of the computer you are using.

The first step is to install Stealther. Since this is a Firefox extension, you must be using the Mozilla Firefox web browser, which we whole-heartedly recommend. You can find the latest version of the Stealther extension here. Simply click on the Install Now link on that page and it will download the extension.  

Next, close Firefox and then restart it. This will prompt Firefox to install Stealther.

When Firefox re-opens, click on the Tools menu. There, you will find a menu option for Stealther. Click it, and your web browsing is now private! Click it again, and Firefox is returned to normal.

You can configure Stealther to only disable those options that you prefer to disable. To do so, click on the Tools menu and choose Extensions. Find Stealther in the list, click on the Options button, and choose the options you prefer.

There is also an option to remove Stealther from the Tools menu altogether (if you really want to be stealthy). You can always enable or disable Stealther by hitting Ctrl-Shift-S.

Surf safe (and privately)!