I recently had to install Chrome on my computer to access a program that would not open using Firefox. Then I had to uninstall and reinstall Firefox. Now there are no search engine options. In the Options window, no names show up in the drop-down box for selecting a search engine. Restoring the default engine does nothing. In the search bar of Firefox, nothing happens when I click the arrow next to the search icon - no names, no nothing, and when I enter anything to search, pressing Enter and clicking the Go arrow in the search box does nothing at all. What is missing?