Recently a client asked if we can help with memory leaks in WebViewer in FileMaker. I suggested to try our custom Webviewer via plugin functions. See WebView.Create, which works on Windows, too.
Trying that, we saw also memory leaks with the plugin functions. So we checked our plugin functions and found a couple of places, where our plugin would not free references correctly. That is fixed for next version.
Please try to use WebView.Create, do something with the WebViewer like loading a website there and later call WebView.Close to remove the WebViewer. Let us know if you still find a way, where we leak memory or any problem you may find with next plugin.
PS: Our MBS Xojo Win Plugin also gets a few similar fixes.