I took a screenshot[0] using the firefox utility and the result is a black rectangle. It's even funnier when I open the dev tools, the transparent image is rep

I took a screenshot[0] using the firefox utility and the result is a black rectangle. It's even funnier when I open the dev tools, the transparent image is replaced by a violet rectangle, blinks a few times then stay violet[1]! [0]: https://up.l3m.in/file/1646929301.png https://up.l3m.in/file/1646929301.png [1]: https://up.l3m.in/file/1646929762-a.webm https://up.l3m.in/file/1646929762-a.webm