ctrl+L does not work in firefox

[Tapas Mishra]

While watching this video
http://www.youtube.com/watch#!v=znxQOPFg2mo&feature=related

Ctrl+L did not worked on my laptop.
Dell Inspiron 1440.


Firefox 3.6.8

Extensions
      Google Toolbar for Firefox 7.1.20100830L
      TheFreeDictionarycom Community Toolbar 3.1.0.12
      Conduit Engine 3.1.0.12

Theme

      Default 3.6.8

Plugins
      Windows Media Player Plug-in 10 (compatible;Totem)
      VLC Multimedia Plugin(compatible Totem 2.30.2)
      Shockwave Flash (10.1 r82)
      QuickTime Plug-in 7.6.6



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