Ghostery like protection is already built in. There is no menu option for normal browsing mode but you can turn it on in about:config. Set privacy.trackingprotection.enabled to true.

uBlock Origin is nice on Firefox for Android

I just user the Ghostery browser. Is there any benefit to using Firefox?

Firefox on Android has full extension support, so you can install things like Self-Destructing Cookies and HTTPS Everywhere as well.