When your video freezes
We recently fixed a regression in Firefox 57 that the max-fs parameter in fmtp lines had stopped working in Firefox 56. Because it got reported to us while Firefox 56 was still in it’s Beta cycle we uplifted the patch for Firefox 56 as well.
It got diagnosed a short time ago that this patch had unforeseen consequences: it can result in Firefox stopping to send video in the middle of a call.
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