screenshotUndo Closed Tabs Button | Download Lets you undo closed tabs via a toolbar button and/or a tab bar button.

  Please check the YouTube Tutorial at the bottom of this page to get an idea of how this Addon works in your browser.  If you want to contribute to the developement of this Addon, please Fork it on GitHub, and push your changes to a named branch. Moreover, you can review all the comments made on GitHub commits.

Some of the important features about Undo Closed Tabs Button addon are listed below. This is followed by an overview about this addon. This summary contains few words about the addon, its function and features. Next is FAQ, this section is useful to get information about how this addon works in your browser. If you couldn’t find a specific answer, please fill the bug report form in this page or the contact form in the homepage to let us know about your question. Following the FAQ, is the bug report form. It is designed to collect user feedbacks and bugs about this addon. Users can suggest improvements or feature requests through this form too. Next section is for submitting comments about this addon which uses facebook comments plugin. The last section is dedicated to reports submitted through the GitHub website. We hope the information provided in this page, could help you get all the basics you need about this addon and enable you to have a better experience with Undo Closed Tabs Button.

Undo Closed Tabs Button is designed to open recently closed tabs in Firefox browser. Although it is possible to use the built-in close tab functionality of the browser (Ctrl + Shift + T).

5 Reasons to Use Undo Closed Tabs Button

  • Provides more through undo close tab functionality by letting you choose the desired closed tab from the available list.

  • Provides undo closed tabs via a toolbar button or the right-click context menu.

  • Easily have access to undo close tab functionality of the browser right from a toolbar button.

  • Store a customizable number of tabs to restore in the undo menu.

  • Two different themes for both light and dark Firefox interfaces.


  • When you are multitasking in Mozilla Firefox, you might close a tab or two while switching between tabs. This is quite common when you are surfing different websites simultaneously. Most people who open a few tabs at once have to go through a lot of trouble to find the tab they have closed in the history. If you are doing extensive research and you accidentally close the tab in which you found the most information about your niche, it can be nuisance to retrieve it. However, in situations like these, the Undo Closed Tabs Button Addon comes in handy.

    The Undo Closed Tabs Button is an extremely convenient add-on which helps you in retrieving all the closed tabs at once. If you were in the middle of writing a piece of research and your most informational tab got accidentally closed, the Undo Closed Tabs Button can help you retrieve it without having you go through any trouble. This means that you can continue your surfing without hindrance of any sort. It lets you choose the desired tabs you want you re-open through a list of closed tabs. It is a user-friendly extension and can easily be used with a click of a button on the context menu. You can also store a customizable number of tabs in the undo menu in order to select from the most commonly opened tabs. The Undo Closed Tabs Button helps you in getting back all the tabs which you might have closed unintentionally or intentionally. Above all, the Undo Closed Tab Button is compatible with different Mozilla Firefox themes; i.e. the light, as well as, the dark interface. We would recommend this convenient add-on to everyone, especially people who have a habit of multitasking and who usually go through the scenario of closing tabs accidentally.

Frequently Asked Questions

  • 1. What is new in this version for Undo Closed Tabs Button?

    Check this link for information about the recent update in Mozilla Firefox.

  • 2. What does Undo Closed Tabs Button extension do?

    Tired of going to History -> Recently Closed Tabs just to undo a closed tab? Then this extension is for you! This extension allows you to undo closed tabs via a toolbar button and/or tab bar button. Click the image one time to undo the last closed tab...Three times to open the last three closed tabs and so on. Click the drop down arrow to see the list of last previously closed tabs and select which one you would like to undo.You can also undo closed tabs by using the CTRL + SHIFT + Z shortcut key and also a right-click context menu entry. There is a options menu (Tools -> Add-ons -> Extensions), here you can edit the amount of closed tabs to remember, hide the history menu from the toolbar button, remove the right-click context menu entry or remove the tab bar button.

  • 3. How to add or remove the toolbar button?

    You can add the button to the navigation toolbar by going to Firefox "View" then "Toolbars" and click on "Customize", then drag and drop the button anywhere on the toolbar. The tab bar button is shown by default.

  • 4. How to change addons settings?

    To change addons settings go to Addon-manager in Firefox and then click on Undo Closed Tab Button and follow the Options. An screenshot is shown here.

  • 5. How to change the assigned keyboard shortcut (Ctrl+Shift+Z)?

    To change the default keyboard shortcut (which opens last closed tab), open a new browser tab, enter "about:config" and search for "undoclosedtabsbutton.modifier" and "undoclosedtabsbutton.key" then change them accordingly.

  • 6. Toolbar icon is too dark for my theme. Is it possible to change it?

    Yes, check extension's setting for an alternative icon.

  • 7. Is it possible to remove "Open all closed Tabs" from the drop-down menu (to prevent accidental click)?

    Yes, there is an option for this purpose in the extension's setting window.

  • 8. What are the alternatives for this Addon (as an extension or software)?

    Please check AlternativeTo website ( to get more info about different alternative softwares for "Undo Closed Tabs Button".

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    Submitting Bugs

    Your feedback goes a long way towards making this addon even better. With this Bug report form, you can submit bugs or suggest enhancements for the functionality or performance of this addon. Please note, this bug report form will be sent to the developer(s) of this addon. You will not get an immediate or personal response at the moment. However, the developer(s) may contact you through the email address provided in this form for further clarifications or requesting additional information regarding the reported bug(s).

    Please enter the name of the extension (addon).

    Please enter the current version of the extension.

    Please be as specific as possible. Basically, describe what happened, what you were doing when it happened, and why you think it is a problem.

    Describe the step-by-step process required to reproduce the issue you are reporting. Be specific when describing these steps by providing as much detail as possible.

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    Comments | Reviews

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