[cairo] Question about how Firefox 3 switching to use cairo as the graphics engine

[ying lcs]

Hi,

I know this may be a wrong question for this question. But I get no
response when i posted this to mozilla newsgroup.

I think  Firefox 3 switching to use cairo as the graphics engine.
I think it can use cairo paint text, draw line functions to display
web page content.
But what about plugins? How will plugins being drawn to the cairo surface?

Thank you.