What to KnowGo to the Firefox menu (three lines) and choose Preferences > Privacy and Security > History.Select Clear History. In the Clear Recent History dialog, choose a Time range to clear from the drop-down menu.Next, select the items under History you'd like to clear. Select OK to confirm.
This article explains how to delete your search history in the Mozilla Firefox web browser, which retains a record of all searches made from its integrated Search Bar. While convenient, this feature may cause privacy concerns.
How to Delete Search History from Firefox
When you don't want Firefox to store your past searches, go to the Firefox preferences, and delete your search history.
Select the Firefox menu, represented by three horizontal lines, located in the upper-right corner of the browser window.
When the drop-down menu appears, choose Preferences.
The Firefox Preferences tab displays. Select Privacy & Security located in the left menu pane.
Go to the History section and select Clear History.
In the Clear Recent History dialog, choose a Time range to clear from the drop-down menu, and select the items under History you'd like to clear. Select OK to confirm.