Go into your account settings, under Preferences, and enable the compatibility version of the map. You have to do this separately in every browser you use for FL. You should always do this, even if you have a high-end machine running the latest version of your browser, because the design of the non-compatibility version of the map is so much worse. (Why do I see less when I zoom out? Why did you think I zoomed out, you stupid map? Show me everything, all the time!)