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WebRTC video bandwidth test at test.webrtc.org always fails 88.0 64-bit and 89.0b4 64-bit

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This problem seems the same that Seren reported with FF 75 and 76 that was fixed in 76.0.1. https://support.mozilla.org/en-US/questions/1286300. It would be good to know that FF will work with remote presenters joining a webcast via Telestream's Wirecast Rendezvous no matter what browser they're using. Other browsers tested were Chrome 90.0.4430.93, Edge 90.0.818.49, and Opera 75.0.3969.243. They all work; only Firefox reports this problem in both 88 and 89 (Windows 10 64-bit).

Firefox: Throughput Data throughput [ OK ] Transmitting at 515.066 kbps. [ OK ] Transmitting at 521.68 kbps. [ OK ] Transmitting at 526.166 kbps. [ OK ] Transmitting at 522.72 kbps. [ OK ] Transmitting at 523.764 kbps. [ OK ] Total transmitted: 2629.632 kilo-bits in 5.038 seconds. Video bandwidth [ FAILED ] Frame rate mean is 0, cannot test bandwidth without a working camera. [ INFO ] Send bitrate mean: NaN kbps [ INFO ] Send bitrate standard deviation: NaN kbps [ INFO ] RTT average: 0 ms [ INFO ] RTT max: 0 ms [ INFO ] Packets lost: -1

BTW, the camera tests all work - green check marks on all: why no camera here?

Typical results (from Edge): Throughput Data throughput [ OK ] Transmitting at 1512.495 kbps. [ OK ] Transmitting at 1561.549 kbps. [ OK ] Transmitting at 1579.477 kbps. [ OK ] Transmitting at 1581.341 kbps. [ OK ] Transmitting at 1550.279 kbps. [ OK ] Total transmitted: 7847.936 kilo-bits in 5.039 seconds. Video bandwidth [ OK ] Video resolution: 1280x720 [ INFO ] Send bandwidth estimate average: 3621 kbps [ INFO ] Send bandwidth estimate max: 4873.574 kbps [ INFO ] Send bandwidth ramp-up time: 318 ms [ INFO ] Packets sent: 9000 [ INFO ] Packets received: 8983 [ INFO ] NACK count: 0 [ INFO ] Picture loss indications: 0 [ INFO ] Quality predictor sum: 2576 [ INFO ] Frames encoded: 296 [ INFO ] Frames decoded: 295 [ INFO ] RTT average: 69 ms [ INFO ] RTT max: 77 ms [ INFO ] Packets lost: 0

Anyone have a clue as to what might be going on? Why is the data one-third of what Edge is transmitting? Is FF blocking access to the camera for some reason for this test even though the web site is allowed access to both the camera and microphone in Settings?

This problem seems the same that Seren reported with FF 75 and 76 that was fixed in 76.0.1. https://support.mozilla.org/en-US/questions/1286300. It would be good to know that FF will work with remote presenters joining a webcast via Telestream's Wirecast Rendezvous no matter what browser they're using. Other browsers tested were Chrome 90.0.4430.93, Edge 90.0.818.49, and Opera 75.0.3969.243. They all work; only Firefox reports this problem in both 88 and 89 (Windows 10 64-bit). Firefox: Throughput Data throughput [ OK ] Transmitting at 515.066 kbps. [ OK ] Transmitting at 521.68 kbps. [ OK ] Transmitting at 526.166 kbps. [ OK ] Transmitting at 522.72 kbps. [ OK ] Transmitting at 523.764 kbps. [ OK ] Total transmitted: 2629.632 kilo-bits in 5.038 seconds. Video bandwidth [ FAILED ] Frame rate mean is 0, cannot test bandwidth without a working camera. [ INFO ] Send bitrate mean: NaN kbps [ INFO ] Send bitrate standard deviation: NaN kbps [ INFO ] RTT average: 0 ms [ INFO ] RTT max: 0 ms [ INFO ] Packets lost: -1 BTW, the camera tests all work - green check marks on all: why no camera here? Typical results (from Edge): Throughput Data throughput [ OK ] Transmitting at 1512.495 kbps. [ OK ] Transmitting at 1561.549 kbps. [ OK ] Transmitting at 1579.477 kbps. [ OK ] Transmitting at 1581.341 kbps. [ OK ] Transmitting at 1550.279 kbps. [ OK ] Total transmitted: 7847.936 kilo-bits in 5.039 seconds. Video bandwidth [ OK ] Video resolution: 1280x720 [ INFO ] Send bandwidth estimate average: 3621 kbps [ INFO ] Send bandwidth estimate max: 4873.574 kbps [ INFO ] Send bandwidth ramp-up time: 318 ms [ INFO ] Packets sent: 9000 [ INFO ] Packets received: 8983 [ INFO ] NACK count: 0 [ INFO ] Picture loss indications: 0 [ INFO ] Quality predictor sum: 2576 [ INFO ] Frames encoded: 296 [ INFO ] Frames decoded: 295 [ INFO ] RTT average: 69 ms [ INFO ] RTT max: 77 ms [ INFO ] Packets lost: 0 Anyone have a clue as to what might be going on? Why is the data one-third of what Edge is transmitting? Is FF blocking access to the camera for some reason for this test even though the web site is allowed access to both the camera and microphone in Settings?