I download this [try build](https://treeherder.mozilla.org/jobs?repo=try&revision=994977b020b118609fac82b5d454c302bb12e3c2) and it seems the test case from comment 7 is fixed. Sadly the bug is still present on YouTube :/ Right now I am trying to assemble a new testcase that better matches what YouTube does.
Bug 1796942 Comment 14 Edit History
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I downloaded this [try build](https://treeherder.mozilla.org/jobs?repo=try&revision=994977b020b118609fac82b5d454c302bb12e3c2) and it seems the test case from comment 7 is fixed. Sadly the bug is still present on YouTube :/ Right now I am trying to assemble a new testcase that better matches what YouTube does.