Good call on single threaded language bridging. Multithreading in XPCOM was either bad or worse depending on the phase of the moon. I almost had an important pr

Good call on single threaded language bridging. Multithreading in XPCOM was either bad or worse depending on the phase of the moon. I almost had an important project tank because XPCOM "out" parameters (unfortunately used internally whenever a method had a return value) were not thread-safe. We ended up using a different threading library and only making synchronous XPCOM calls.