Gecko does this for external scripts:

• https://searchfox.org/mozilla-central/source/dom/script/ScriptLoader.cpp#2619-2620

There's also a setModule function that we should replicate for our module scripts:

• https://searchfox.org/mozilla-central/rev/ab26427a8d31be475be11bbae0e04c84cc7f20ef/js/public/CompileOptions.h#566-572