Firefox does not delete recently closed tabs after this is done several times.
I'm having trouble clearing "Recently Closed Tabs" and "Recently Closed Windows" under the History tab after doing it several times. I'm not talking about closing the same tabs and windows over and over again. I'm talking about closing some tabs and windows, then later on closing some other tabs and windows, then later on closing even other tabs and windows, etc. After a few rounds of doing this, Recently Closed Tabs and Windows don't disappear from the History tab. The only remedy is to close Firefox, then open it again. Thanks in advance for any help.
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You can (temporarily) set the pref browser.sessionstore.max_tabs_undo to 0 to clear the "Recently Closed Tabs" list.
If you want to re-use the "Recently Closed Tabs" feature (Undo Closed Tabs) then you can reset the pref browser.sessionstore.max_tabs_undo to the default value via the right-click context menu.
- http://kb.mozillazine.org/browser.sessionstore.max_tabs_undo
- http://kb.mozillazine.org/browser.sessionstore.max_windows_undo
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.
- Use the Filter bar at to top of the about:config page to locate a preference more easily.
- Preferences that have been modified show as bold (user set).
- Preferences can be reset to the default via the right-click context menu if they are user set
- Preferences can be changed via the right-click context menu: Modify (String or Integer) or Toggle (Boolean)