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: Pro CSS for High Traffic Websites Although web standards-based websites can scale effectively—and basic CSS will give you basic results—there are [...]