I have a problem with Firefox Beta 52. It doesn't happen in Firefox ESR 45. Sometimes in Responsive Design Mode audio indicator is displayed when there's no sound and vice versa. It happens unpredictably, however, I noticed one specific scenario when it happens 1. Open https://www.youtube.com/watch?v=ZGqhhx8cxMg 2. Enter Responsive Design Mode, stop the video Result: audio indicator is displayed in the tab Expected: no sound indicator
(In reply to YF (Yang) from comment #1) > Dupe of bug 1345538? see that comment 1. Please explain why you think Bug 1345538 comment 1 does apply here.
Uh, I don't know if you have waited for enough time (about 5 seconds). Works for me in Fx52.0.2 (32-bit), 53.0b9 (64 bit) and 55.0a1 (2017-04-08) (32-bit) on Win10 1703.
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