Jonathan Watt [:jwatt] Assignee
	Description • 10 years ago

We should avoid loading the html.css UA style sheet when possible. Currently we load it for _all_ documents because ua.css (which is loaded for all documents) @import's it. This means that we load it for XUL documents, SVG documents, SVG-as-an-image, etc.

	David Baron :dbaron:
	Comment 2 • 10 years ago

(In reply to Jonathan Watt [:jwatt] from comment #0)
> We should avoid loading the html.css UA style sheet when possible. Currently
> we load it for _all_ documents because ua.css (which is loaded for all
> documents) @import's it. This means that we load it for XUL documents, SVG
> documents, SVG-as-an-image, etc.

But these other types of documents can all include elements in the HTML namespace, and often do.  So I don't think we can do this.

	Jonathan Watt [:jwatt] Assignee
	Comment 3 • 10 years ago

The patch (yet to be worked through Try) loads html.css on demand in nsGenericHTMLElement::BindToTree. Try will hopefully give me a better idea of how common it is for XUL to include HTML elements. If it's common it may be better to load html.css up front for XUL too. I don't think it's common enough for SVG documents.