How to clear or disable recently closed tab section in Firefox

Firefox displays the recently closed tabs under History menu –> Recently Closed Tabs.

If you want to clear or disable the recently closed tabs section then you can do the following

• In the Firefox address bar type about:config
• If you get the below warning message then click on the I’ll be careful, I promise button

• Type browser.sessionstore.max_tabs_undo in Filter text box

• Set the value for browser.sessionstore.max_tabs_undo to 0 and click OK to confirm the changes

Now if you navigate to History menu –> Recently Closed tabs section will be disabled as shown below.