Bugzilla

Hi,

I restart this bugzilla because the API is not implemented 
I met one of the contributors to the "paged media" project [1] and the project is used by many people.

In addition, the layout is also important for web pages, online documentation and web press.

If a CSS file uses the code below, the code does not work because it is not implemented:
```
@media print {
    Page {
        size: 148mm 200 mm
    }
}
```
Page W3[2] explains how to code it

I think it should be inserted in the DOM of the browser because it works on other browsers

Thanks

Christophe

[1] https://www.pagedmedia.org/paged-js/
[2] https://www.w3.org/TR/css-page-3/#page-size-prop