if we dont support the marquee tag, it would be better also to ignore its content. people often put alot of text in those marquees and mozilla renders that text all over the pages and makes them unreadable.

The behaviour you propose would be incorrect; unknown tags should be ignored, not hidden. Besides, some sites put important information in <marquee> which would be lost if Moz ignored its content. WONTFIX. If you want, you can do this manually in your own Mozilla installation by adding the following line to your userContent.css: marquee {display:none!important}

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