I have the same problem. Steps to reproduce:
1) Start a dev webserver with directory listing enabled
2) Place an image or video in its root
3) Visit the directory listing in deovr like http://192.168.0.2:8080
4) Click on one of the listings => Browser freezes
Experienced on an Oculus Quest 2 with https://www.npmjs.com/package/http-server as the http-server and the sample videos from your documentation and some cardboard images from my last vacation.
It looks like deovr doesn't even make the request to the images, at least it doesn't show any in the http logs.