Given that Firefox 3.6 is planned to end on 24 April 2012, that STIX 1.0 has been released for a long time and STIX 1.1 was recently released, I don't see any reason to keep this table.
Created attachment 612166 [details] [diff] [review] Patch
Created attachment 626133 [details] [diff] [review] Patch V2
Created attachment 629323 [details] [diff] [review] Remove obsolete MathML tables for stretchy characters Here is a related patch to remove other obsolete math tables.
It's 2 years since Gecko has had support for STIX 1.0. Fonts don't usually need upgrading frequently, so I suspect there will still be users with only the Beta fonts. I assume removing Beta support will negatively affect those users, so I'd prefer to keep the support at this stage, if it is not getting in the way.
OK, the two patches are independent so we can commit only one.
(In reply to Ryan VanderMeulen from comment #6) > https://hg.mozilla.org/integration/mozilla-inbound/rev/206659c1759b https://hg.mozilla.org/mozilla-central/rev/206659c1759b
Fixed per bug 407059.