Yes this is a regression with firefox 7+ browsers, the creator of emscripten (@kripken) has already opened a bug in it https://bugzilla.mozilla.org/show_bug.cgi

Yes this is a regression with firefox 7+ browsers, the creator of emscripten (@kripken) has already opened a bug in it https://bugzilla.mozilla.org/show_bug.cgi?id=687951 https://bugzilla.mozilla.org/show_bug.cgi?id=687951 . And ya, we try to sandbox most of our languages inside a Web Worker, which leaves the main thread intact incase of infinite loops and such.