User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0 Steps to reproduce: Open many tabs until the close tab X disappears from each. Have sound playing from an inactive tab. Click just to the left of the mute icon to switch to that tab. Sound will become muted as the mute icon now changes position to make room for the X icon. Actual results: Sound becomes muted even though the user was just clicking to switch to that tab. Expected results: The tab with sound should have became the active tab and sound should continue to play.

Hey, sorry for the dupe report. I searched but couldn't find it.