Change Browser security settings
In the Browser, tap
> Privacy and Security.
Applications and features
Remove History Items
Specify how often your BlackBerry device automatically deletes the browsing information from your BlackBerry
Do Not Track
Tell websites that you do not want your browsing activity to be tracked.
Choose whether or not to allow pop-up windows to appear in your browsing session.
helpful because websites can use them to remember information about your preferences and user information, but
cookies can pose a privacy risk as well.
Clear Cookies and Other Data
Clear all of your saved Browser information.
Clear your Browser history.