Microsoft Outlook is likely one of the first to make use of WebView2 to expand and standardize features. WBRT is the acronym for Web View2 Run Time Just in the same way that they don’t know if a VB or C# Runtime module is being used. Ideally, people will use a program and never realize they are working with parts of Edge. Instead of insisting people install Microsoft Edge browser, WebView2 Runtime is a library of Edge functions that work without the full browser installation. The program still looks normal, but it can include bits of HTML, CSS and Javascript. Modern apps can call Edge components to, for example, make user interfaces within programs. WebView2 is a similar thing but it’s based around Microsoft’s Edge browser. Other libraries are installed with Windows. If you’ve used Windows for years, you may remember installing VB Runtime libraries so that some programs could work. Rather than each programmer ‘reinventing the wheel’ for basic tasks, they call on a library to do the job. These libraries are common features and tools which programs can use. WebView2 is the latest in a long series of programming libraries from Microsoft. At worst, it’ll be installed when an app needs it. If it’s not there, the Runtime module may well appear in future.

Ms edge webview2 runtime