Firefox is a popular web browser that makes it easy for Mac users to clear their surfing history. This is useful if you share your Mac with another user and you do not want them to see where you have surfed. Clearing your history takes about one minute.
Open your Firefox browser.
Hit "Tools" in the main menu bar.
Scroll down and click "Clear Recent History..."
Click the drop-down menu for the time range that you want to clear.
Put a check mark next to "Browsing & Download History" and "Form & Search History."
Hit the "Clear Now" button.
Restart your browser.
- internet image by Jean-Michel POUGET from Fotolia.com