How do I stop FireFox from discreetly installing updates, which removes the bookmarks and seetings?

It happens with out my knowledge. This leads me to lose my bookmarks, settings and is such a nuisance. How do I stop FireFox from losing my settings and bookmarks? Thank you. Suggested Reading: JavaScript Interview Questions, Answers, and Explanations: JavaScript Certification ReviewThe Ultimate JavaScript Reference & Learning Guide Over 100 Certification Questions, Answers, and [...]