Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Pomoc pśepytaś

Glědajśo se wobšudy pomocy. Njenapominajomy was nigda, telefonowy numer zawołaś, SMS pósłaś abo wósobinske informacije pśeraźiś. Pšosym dajśo suspektnu aktiwitu z pomocu nastajenja „Znjewužywanje k wěsći daś“ k wěsći.

Learn More

Video playback not working

  • 5 wótegrona
  • 0 ma toś ten problem
  • 1 naglěd
  • Slědne wótegrono wót Jens Lyn IV

more options

Video playback initially works, until suddenly it doesn't; no new videos will work, and videos that previously played in the same browsing session will stop working. Easy to reproduce on Reddit by browsing any video-heavy subreddit. Leaving a broken video in a tab seems to infect the rest of the browser across websites; if a broken video from site A is open in another tab, videos on site B won't play.

Sometimes quitting and restarting Firefox is enough to temporarily get video playback working again; sometimes I have to manually clear the browser cache; at least once I've had to reboot my phone.

Screen recording with symptoms: https://youtu.be/5O6FOax7ozA

Device is a Sony Xperia I V

Video playback initially works, until suddenly it doesn't; no new videos will work, and videos that previously played in the same browsing session will stop working. Easy to reproduce on Reddit by browsing any video-heavy subreddit. Leaving a broken video in a tab seems to infect the rest of the browser across websites; if a broken video from site A is open in another tab, videos on site B won't play. Sometimes quitting and restarting Firefox is enough to temporarily get video playback working again; sometimes I have to manually clear the browser cache; at least once I've had to reboot my phone. Screen recording with symptoms: https://youtu.be/5O6FOax7ozA Device is a Sony Xperia I V
Pśipowjesone fota wobrazowki

Wubrane rozwězanje

Thank you, that was it! Mildly embarrassed I didn't think to test this myself.

The culprit seems to be 'strict' tracking protection; I cannot reproduce the problem after turning it down to 'normal'.

Sorry about the late response, kept getting error messages when trying to reply...

Toś to wótegrono w konteksće cytaś 👍 0

Wšykne wótegrona (5)

more options

I was instructed to post this here in a comment left by staff on my app review.

I guess monitoring the Play Store for negative reviews is more important to Mozilla than responding to support request here...

Wužytny?

more options

"If video playback in Firefox on your Sony Xperia device is problematic, ensure Firefox is updated, clear its cache regularly, disable any interfering add-ons, check for OS updates, verify internet stability, try another browser, and consider reporting the issue to Mozilla or Sony support."

Wužytny?

more options

Who or what are you quoting?

Does posting here not constitute "reporting the issue to Mozilla"?

Wužytny?

more options

Hi

What level of enhanced tracking protection do you have set?

Do you have any add-ons installed in Firefox for Android?

Wužytny?

more options

Wubrane rozwězanje

Thank you, that was it! Mildly embarrassed I didn't think to test this myself.

The culprit seems to be 'strict' tracking protection; I cannot reproduce the problem after turning it down to 'normal'.

Sorry about the late response, kept getting error messages when trying to reply...

Wót Jens Lyn IV změnjony

Wužytny?

Stajśo pšašanje

Musyśo se pla swójogo konta pśizjawiś, aby na pśinoski wótegronił. Pšosym stajśo pšašanje, jolic hyšći njamaśo wužywaŕske konto.