Apply style to a browser

[poleta33]

Hi

in my xul I've defined a browser like that :

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<browser id="content" type="content-primary" name="content" src="about:blank" flex="1" disablehistory="true" disablesecurity="true"/>

I've fetched some html to it like that :

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var iframeDoc = document.getElementById("content");
iframeDoc.contentDocument.body.innerHTML = "<div class="paragraph">Notes</div>";

now I want to define this class "paragraph" in my browser head, but I don't know how to do... the best would be to add a stylesheet "chrome://... test.css" to this browser...