Thunderbird 8.0 & Firefox 8.0 on OpenIndiana

Today I installed Thunderbird 8.0 & Firefox 8.0 on my OpenIndiana 151a.

So far everything is working. For thunderbird the lightning 1.0 must be installed.

The other plugins so far work, when the max version in install.rdf is increased
excpet the engimail. But engimail also didn't work in 7.0. Only in the 6.0 version with the engimail 1.3.2 from here.

I already attempted to compile engimail, but therefore I need a thunderbird
compilation environment, but I do not get thunderbird to compile in