When Microsoft first announced Edge back in May, it was reported that the browser would have some hidden, built-in security features. This recent update will prevent the loading of unsigned DLLs in order to stop the running of unwanted binary extensions and software. The recent update will upgrade the browser’s engine to “EdgeHTML13”, which will protect against code injection. This mechanism will block DLL injections on the browser unless they are Microsoft components or signed device drivers.
DLLs that are Microsoft signed (i.e., Edge components, Microsoft supplied features, Widows components, etc.) or Windows Hardware Quality Lab (WHQL) signed (i.e., device drivers), will be allowed to load and others will be blocked.