Obsolete since Gecko 24 (Firefox 24 / Thunderbird 24 / SeaMonkey 2.21)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

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Contributors to this page: fscholz, kosvrouvas, teoli, iamanupmenon, kohei.yoshino, Sheppy, Brettz9
Last updated by: fscholz,
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