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.