[Content-Script Bug] Video breakage at photos.google.com

Firefox 73, Windows 10.

Clean new profile with SR extension only.

Open https://photos.google.com/share/AF1QipNxXncKWTWTMBnMYGwH75Km5LmLJVrQfRUoGicXObb1HtutbDEwQ48hD4oKE9g1pw?key=UGF6VFZrWTRVNTREUGNCNGxLZGhaT2RTcHFWb0hn

Click on a picture to make video full screen.

Video does not load and eventually throws error.

The video does not work even with rule *>*.

The video do work only when SR is disabled.