How-To Enable Aero Peek Preview With Firefox Tabs

Groovy Firefox LogoEver since the introduction of tabbed browsing, there haven’t been very many circumstances where having extra windows open is useful.  This scenario is particularly the case with the impressive new Aero Peek feature built into the Windows 7 Taskbar.  Unfortunately, it wasn’t until Firefox 3.6 that Firefox supported Aero Peek with its browser Tabs. For some reason, Firefox comes with this feature disabled by default???  No worries, I have a simple tweak to enable Aero Peek Preview with Firefox Tabs!


How To Enable Aero Peek Preview with Firefox Tabs


1. In a Firefox window Type about:config in the address bar.  When the page loads, you’ll see a warning that you are about to enter the advanced settings of Firefox.  Click the I’ll be careful, I promise! button to open advanced settings.

about:config firefox warning


2. In the Filter box Type or Paste in the following:


The filter should now display the preference with a matching name.  Once you see it Right-Click it, and then Select toggle.  This action will switch the Value from false to true.  You can also Double Click the setting to set the value as True.

change the browser.taskbar.previews.enable preference


The setting should take effect immediately (it did on my system.) However, you might need to restart Firefox for the setting to take effect fully.  Once completed, just hover over the Firefox Icon to see all the Firefox tabs currently open in all your Firefox windows.

firefox with tabs shown as previews


You’ll also notice that the Firefox taskbar icon now has tabbed edges, the icon will now change functionally to identify that there are additional tabs open within Firefox windows.

fanned or tabbed edges on firefox icon in taskbar



  1. Jordan

    Hey, thanks for this – very useful. I always hated it not displaying the preview! Nice work.

  2. tainted

    Awesome. I agree with Jordan. Firefox never showing up in Aero peek always pissed me off. Now it works!

    Do you have a fix for chrome????

  3. Musel

    Cool Very Nice Thx….

  4. Robert

    I love this one. Makes browsing in multiple tabs more easy.

    • MrGroove

      @Robert – Tell me about it! Thank for the feedback!

  5. alpipego

    Awesome, thanks!

  6. Stephen Porter

    Darn….doesn’t work for me. Nothing listed under “taskbar” in about:config list. What am I missing???

    • MrGroove

      Are you running Windows 7? (I’m sure you are but had to ask) Also, did you do a search for everything under browser. ?

      What version of Firefox are you running?

      • Stephen Porter

        Yes–Win 7. After my post here I did some more searching discovered that there are other/different steps for setting up Firefox to show tabs with Aero-peek. I changed those and it is working now.

        Thanks for the feedback!

  7. JackLloyd.

    Came across this post by mistake (wanted to know if its possible to ‘pin’ previews) but this is cool, always used to annoy me how FF did this!

  8. Sunman

    Thnx heaps, that’s awesome. it’s nice to be able to change apps without losing functionality.

  9. blastikor


  10. FiredTabs

    Worked at once. Thanks!

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