It's FAQ, for certain: Frequently Asked Questions, a simple plural. With “FAQs”, you get an extra S… would that be called a double plural? Anyway, two s's have no Earthly reason to exist.

Abbreviation for frequently asked question: a question in a list of questions and answers intended to help people understand a particular subject: If you have any problems, consult the FAQs on our website. Want to learn more?

As I read the FAQ and reviews, it was obvious that he was hands on and cared. A simple search for personal firewall FAQ will produce many a thousands of results. If you have a question, consider reading the general maze FAQ first.