stretchy characters in firefox mobile (android)

Hi,

Testing MathML on an Android device (using text/html html5 style markup 
if it makes any difference). Can stretchy characters be made to work?

Looking at

http://monet.nag.co.uk/~dpc/stfmml.html

the mathml layout is understood but the stretchy () brackets come out as 
a vertical stack of missing glyph boxes.

I tried to make the stix fonts available using @font-face:

http://monet.nag.co.uk/~dpc/stfmml2.html

using a set of pre-cobverted fonts I found at

http://hublog.hubmed.org/archives/001931.html

although that isn't a full set and I'm not sure how (or of it's 
possible) to refer to the fonts used for internal glyph mappings for 
stretchy characters, or if @font-face works on firefox mobile.

David

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