Search engine suggestions are meant to help the users find out frequent and widespread phrases that other people may have looked for while browsing that search engine.
Most of the search engines like Google, Yahoo, Bing etc. offer this featurem per say it’s not Firefox which not offer it, instead it is a default functionality provided by the search engines. Firefox generally simply retrieves the search suggestions from the search engines, and displays the list. The Firefox comes enabled with Search Suggestions by default. A user may choose to disable this feature if it is not required.
If you want to turn off this feature in Firefox if you may simply follow any of the two simple methods:
You may choose to disable the search suggestions from the Search Bar. For this you simply have to right-click on the Search Bar. When you right click you will find the menu showing ‘Show Suggestions’. You will now have to uncheck the ‘Show Suggestions’ menu item to snap the state of search suggestions. It means that you will simply have to change it from enabled to disabled. If you want to enable this feature in the future you may replicate the same steps and then choose the enable option at the end.
You may also disable Search Suggestions through the Search Engines Manager. For using this method you will simply have to click on the drop down arrow present next to the search engine icon of the Search bar. Here you will have to click ‘Manage Search Engines‘. Now you will have to deselect the ‘Show search suggestions’ check box. This process will ensure that your search suggestions are disabled.
This method may be applied all the search engines present in the list and is not restricted to any single individual search engine