Dot cloud computer takeover: clicks unresponsive in Firefox on Fedora, works in Chrome

On Fedora Linux, taking control of dot’s cloud computer works in Chrome, but clicks produce no visible response in Firefox. I can’t tell whether the screen stream keeps updating.

Disabling picture-in-picture didn’t help. Refreshing may have helped for about a second, but that’s uncertain.

Is this a known Firefox compatibility issue? What diagnostics would help investigate it?

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