Changing autocomplete behavior - Firefox

The address bar and search bar both have autocomplete dropdowns that appear with a list of previously entered data. To remove them, you will need to edit your config files.

In userChrome.css, add the following line:

#PopupAutoComplete > .autocomplete-tree { display: none !important; }

If you also want to remove the dropdown button at the far right of the address bar, add the following line:

.autocomplete-history-dropmarker { display: none !important; }

To retain some autocomplete functionality, you may want to enable inline autocomplete.