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Adicione funcionalidades e estilos extra para tornar o Thunderbird só seu.
FecharNo need flash plugin on embeded youtube movies 2
por Vasiliy Temnikov
No need flash plugin on embeded youtube movies
Acerca deste extra
If you don't have Adobe Flash Plugin and you don't want install it.
On sites with old object and embed tags addon will replace it on iframe for html5 youtube player.