Try one of these articles:
- Private Browsing on Firefox for Android Private Browsing on your mobile device is great for viewing websites incognito - without saving information about the sites you visit.
- Clear your browsing history and other personal data on Firefox for Android Firefox for Android makes it easy for you to delete your browsing information. You can even automatically delete your data every time you quit Firefox.
- Tracking Protection in Firefox for Android Firefox for Android's Tracking Protection feature uses a list provided by Disconnect to identify and block trackers.
- Mixed content blocker in Firefox for Android Firefox automatically protects you from attacks by blocking potentially harmful insecure content on pages.