Firefox has great security out of the box, but if you want better security and privacy, here are some recommendations: 1. Set Enhanced Tracking Protection to "Strict" (Menu > Settings > Enhanced Tracking Protection > Strict) 2. Use Mozilla VPN: Using Mozilla VPN will protect you on public WiFi, and stop your ISP from seeing what websites you visit. https://www.mozilla.org/en-US/products/vpn/ 3. Install uBlock Origin: uBlock Origin blocks ads, trackers, and more. https://addons.mozilla.org/en-US/android/addon/ublock-origin