In the minified source code, we may see, it uses:

``` try { const l=await navigator.mediaDevices.getUserMedia({audio:!1,video:{facingMode:"user"}}); /* ... */ } catch { this.showError("Could not access webcam. Please check permissions.") } ```

There are alternatives to verify mediaDevices support as https://addpipe.com/getusermedia-examples/

But even a missing check shouldn’t be able to crash the browser.

Firefox throws a "this tab is slowing down your browser" warning, but it doesn't crash. Chromium works for me, though.