But it seems that there is no more version of JavaXPCom maintained since Gecko 4.
So we have either:
* SWT + XulRunner 1.9 + JavaXPCom working (except on OSX 64bits and Win64bits)
* SWT + XulRunner 10 working, but no compliant JavaXPCom
As XPCom is a requirement for VPE, it's a kind of deadlock to keep on using XulRunner & XPCom... Except if someone makes a release of JavaXPCom compliant with XulRunner 10.