Guys it's a shame to disperse these excellent topics in this thread. The protection must be different and specifically designed because it depends on the browser used. In Edge with the renderer processes* at IL "AppContainer" probably no other protection is needed. https://blogs.windows.com/msedgedev/2020/09/30/microsoft-edge-multi-process-architecture/ With Chrome with "Untrusted" renderer processes you need to take an extra precaution. Firefox with IL "Low" the precautions to be taken are even greater.