I think there's a chance we could sitepatch this with some hacky JS that does `foo.captureStream = foo.mozCaptureStream`. Not sure if our prefixed implementation works or not with this particular site; comment 3 suggests that maybe it does, so it'd probably worth attempting an intervention if someone has the time (given that the underlying bug 1541471 is currently `webcompat:blocked-resources`).
Bug 1963270 Comment 6 Edit History
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I think there's a chance we could sitepatch this with some hacky JS that does `foo.captureStream = foo.mozCaptureStream` for some `foo` (I'm hand-waving a bit, but you get the idea.) Not sure if our prefixed implementation works or not with this particular site; comment 3 suggests that maybe it does, so it'd probably worth attempting an intervention if someone has the time (given that the underlying bug 1541471 is currently `webcompat:blocked-resources`).