Mozilla Firefox 3.6 and later versions come with lots of new features like Windows 7 Taskbar tab preview thumbnails support. But did you know it also provides new "Ctrl+Tab" preview thumbnails list similar to Windows Vista and 7 "Alt+Tab" preview thumbnails list?
This new feature is disabled by default and if you enable it, it shows a list containing preview thumbnails for each tab once you press "Ctrl+Tab" keys together:

If you are interested in this new feature, you can follow these simple steps to enable it:
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 ctrl in the Filter box and look for following boolean key:
browser.ctrlTab.previews
3. The entry "browser.ctrlTab.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 Firefox will start showing the new tab preview thumbnails list as soon as you press "Ctrl+Tab" keys.
This article was posted by VG in following section: Mozilla Firefox.
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Arvin V. Malabanan
i bet firefox didn't enable it by default because it imitates opera my favorite browser :) what do you think is faster VG? the new beta firefox that i haven't tried yet or opera 10?
VG
^^ Personally I'm a Firefox user. ;)
Arvin V. Malabanan
i think i'll try firefox again base from your cool comment :D i love opera because it has built-in emaill app. does firefox have an email plugin so it can be the same as opera?
Kafata
Weird...
I went to about:config, and the value was already true.
I set it to false, restarted, set it to true again, restarted, and still no tab previews :\
ANy ideas?
Chad
Same problem here @Kafata. HELP. xD
MAGNUMHEART
@ Kafata + Chad
try to reinstall your browser. if possible do a clean install of 3.6 firefox. :D
MAGNUMHEART
@ Kafata + Chad
try to reinstall your browser. if possible do a clean install of 3.6 firefox. :D
L
nice trick vg, work on 3.6.3
but on my firefox it only have
browser.ctrlTab.previews and browser.ctrlTab.recentlyusedlimit
Snd21
@ L
you must set
browser.allTabs.previews and browser.ctrlTab.previews
xD
leechget
did not work in Firefox 3.6.13 PAF Portable