Counter-intruitive, but works briliantly. "The runtime behavior when loaded as a plugin is not widely documented. All I could find is the design document linked above, which tells us that the runtime is initialized once when the first Go plugin is loaded. Apparently a full fledged Go runtime runs alongside the main process.
Empirically, goroutines work naturally, and they keep running after the entry function returns.
The iFrame below shows you a remote site.