Could we possibly have a removeEventListener function for the MuPDFWebVieweras we want to add event listeners to the webviewer but we also need to perform cleanup at times (without removing destroying the whole webviewer instance). Would it be possible to expose a removeEventListenerfunction on the viewer?
@Ryan_Kavanagh Welcome to the forum! Yes, we will add this - should be ready by this time next week I hope. Thanks for the heads-up! 
A late reply - but this has been available sine version `0.10.01 - see: CHANGELOG - MuPDF WebViewer