Mozilla has included various cool eye-candy features since the development of Firefox 3.6 version. Some of them are "Ctrl+Tab Preview Thumbnails" and "Taskbar Tab Preview Thumbnails".
Today we are going to share another cool feature in Firefox which is not enabled by default.
Mozilla Firefox also provides IE like "Quick Tabs" feature which is called "All Tabs Preview". It allows you to see small thumbnails of all running tabs in a single tab as shown in following screenshot:

You can click on a desired thumbnail to activate that particular tab.
You can enable this new feature by using following simple steps:
1. Open firefox and type about:config in the addressbar and press Enter. It’ll confirm, click on I’ll be careful, I promise! button.
2. Now type alltabs in the Filter box and look for following boolean key:
browser.allTabs.previews
3. The entry "browser.allTabs.previews" would be set to false. Double-click on it or right-click on it and select "Toggle". It'll set its value to true.

4. That's it. Now you can access the new "All Tabs Previews" feature by clicking on small square icon given at the end of Tab Bar.
Thanks to our reader "JrColas22" for bringing it to our attention...
This article was posted by VG in following section: Mozilla Firefox.
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Hackerpunk1
Hey thank VG and Minefield Web Browser also Contain this Feature
JX Great
Thanks Vishal, it is useful.
debbie
SUPER FAB, Vishal. glad i found your site...and have bookmarked it for future tips! :)
3abboud
Wow! I wonder why they didn't activate it by default!
ódio
but it only show open tabs?
there is a way to make it work like Opera Speed Dial and open selected bookmarks?
VG
^^ Not possible without using 3rd party add-ons. You can check for add-ons. May be following one will work for you:
http://www.askvg.com/get-opera-speed-dial-feature-in-mozilla-firefox/
ódio
i found 3 add-ons and no one works good. do you reccomend anyone VG?
VG
^^ I'm aware of only that addon which I mentioned in previous comment. If I come across any other add-on, will let you know. :)
ódio
lol, i dont see the link before. thanks VG, but this one is one of the three i've found. i will keep looking too.... maybe a userscript?