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From time to time, when while playing YouTube Premium videos in Firefox on my Android Galaxy S26 (same was on S24 before for years) I connect the phone to Android Auto of my Ford Mustang 2024 with USB cable, the playback stops. After that I still can browse the web, but can not play any video until I twice in a row kill and restart the Firefox (loosing all private pages, etc). Disconnect/reconnect of the cable does not help. There are no any errors reported when it happen. It looks as some connectivity or YouTube problem, except the moment I restart Firefox twice everything goes back to normal. Since during that connection the audio is getting redirected to the car speakers, I suspect the problem may be audio-related, but I have no specific evidences. Also since car's multimedia is usually still booting at the time, it takes Android Auto several seconds to start, and I guess some random delays and/or transient errors might happen during that period, that I guess may be not handled properly by Firefox, making it leak some critical resources.

Sometimes (extremely rare) I experience similar video hangs just when switching between YouTube videos without any connectivity changes, but that may be some different issue.

When I watch Downton Abbey on PBS from outside the U.S, using the Firefox VPN in a Private Window the Closed Captions of the PBS video are displayed TWICE: one above the timeline and the other above it.

This issue is specific to this particular show AND to the Firefox browser.

There are audio and video files for which I receive in the console that they can't be decoded. Media resource could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_RANGE_ERR (0x806e0069)

I play online bridge (Trickster) twice a week and set up Firefox to share video and sound with my USB mic. (Windows 10 desktop, Trickster opened in Firefox). Most of the time it works fine but occasionally the other bridge players will tell me they can no longer hear me. When I click on the mic icon the message is that Firefox is using the mic. The settings still say that the mic is being shared. Sometimes a windows reset will fix the problem but not always. Can you explain what might be happening.

no matter what website when i put on a video it fades between normal and black constantly i dont know if its my computer im not very good at tech it doesnt happen and never happened on google