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"Undo Closed Tab" Disabled

  • 7 replies
  • 14 have this problem
  • 15195 views
  • Last reply by Amit Kasrung

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Hello. The "Undo Closed Tab" Disabled And I Cannot Use That My Firefox Version is 21.0

Chosen solution

You can check these prefs on the about:config page:

  • browser.sessionstore.max_tabs_undo
  • browser.sessionstore.max_windows_undo
Read this answer in context 👍 20

All Replies (7)

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Right click on a tab and check it out..

Use CTRL + SHIFT + T > Undo closed Tab


Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

To Enable SafeMode

  • You can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
  • Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.
  • Once you get the pop-up, just select "'Start in Safe Mode"
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Hello,

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

Thank you.

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Chosen Solution

You can check these prefs on the about:config page:

  • browser.sessionstore.max_tabs_undo
  • browser.sessionstore.max_windows_undo
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Hello cor-el Thank You, Thank You it's Work

Modified by pt.ax

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Try this add-on

Undo Closed Tabs Button

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You can check these prefs on the about:config page:

1. Typed In about:config in url 2. Checked for following preferences. 3. Set value accordingly:

browser.sessionstore.max_tabs_undo SET VALUE to 1 browser.sessionstore.max_windows_undo SET VALUE to 1

Modified by Amit Kasrung