In3Go.com Blog

Mozila released the latest version to Firefox 3.5 browser. There are few new security features, but the interesting part is that it gives the user more tools to manage privacy setting. For those who use public computers, or otherwise wish to keep their browsing habits confidential, Firefox 3.5 includes a new private browsing mode.
When enabled (via the Tools -> Start Private Browsing menu item) Firefox browser will not remember visited pages, form and search bar entries, passwords, download List entries, cookies and cached files.
You can still create bookmarks, and these will be retained when exiting private browsing mode.
A similar feature exists also in Internet Explorer 8 browser. Internet Explorer 8’s InPrivate Browsing feature enables privacy mode by not storing history, cookies, temporary Internet files, or other data.
These features probably make live easier for Internet users who want to keep their surfing habits to themselves, but in the same way it helps the adults in the group it also may allow children to surf unsupervised. Internet savvy kids can easily hide their Internet activities from their parents. So it is very important for parents to understand that monitoring of their children Internet activities by viewing the browser history on the child’s PC might not work. It probably will be better to invest time in educational efforts and constant guidance to safe Internet surfing.