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Firefox History Menu

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Why are "Recently Closed Tabs" and "Recently Closed Windows" grayed out in my Firefox History Menu? I see a list of the recently viewed web pages but I can't use the "Recently Used Tabs" to go back to one of those pages.

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Chosen solution

Enter about:config in the URL bar and check the preferences browser.sessionstore.max_tabs_undo and browser.sessionstore.max_windows_undo.

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Chosen Solution

Enter about:config in the URL bar and check the preferences browser.sessionstore.max_tabs_undo and browser.sessionstore.max_windows_undo.

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TyDraniu Thanks for solving my problem.

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