Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Flash playback Issues since upgrade to Firefox 40

  • 2 uphendule
  • 5 zinale nkinga
  • 2 views
  • Igcine ukuphendulwa ngu DanNJ316

DanNJ316
DanNJ316
more options

I was prompted to upgrade to Firefox 40 today, and as soon as I did that, I started having issues with video playback on YouTube and various other sites. The video was slow, the sound was all garbled. I have the latest version of Flash installed. Everything was working perfectly before the upgrade.

Just to see, I downgraded back to Firefox 39.0.3 and the playback issues were gone. So needless to say, I won't be upgrading anytime soon. Is this likely a Firefox issue, a Flash issue, an issue with my computer? I'm running Windows XP. Any help, thoughts would be appreciated.

I was prompted to upgrade to Firefox 40 today, and as soon as I did that, I started having issues with video playback on YouTube and various other sites. The video was slow, the sound was all garbled. I have the latest version of Flash installed. Everything was working perfectly before the upgrade. Just to see, I downgraded back to Firefox 39.0.3 and the playback issues were gone. So needless to say, I won't be upgrading anytime soon. Is this likely a Firefox issue, a Flash issue, an issue with my computer? I'm running Windows XP. Any help, thoughts would be appreciated.

Isisombululo esikhethiwe

Hi Dan, another XP user reported today that YouTube had switched to the HTML5 player for him, which does not work so well on XP.

There are at least two extensions to force YouTube to serve the Flash player, and perhaps one of these would work around the problem:

Funda le mpendulo ngokuhambisana nalesi sihloko 👍 0

All Replies (2)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
more options

Isisombululo Esikhethiwe

Hi Dan, another XP user reported today that YouTube had switched to the HTML5 player for him, which does not work so well on XP.

There are at least two extensions to force YouTube to serve the Flash player, and perhaps one of these would work around the problem:

DanNJ316
DanNJ316 Umnikazi wombuzo
more options

Thanks for the reply! I tried the first add on you listed, and it appears that has fixed the problem. My videos are playing normally again. Guess my system isn't ready for HTML5 yet. Appreciate the assistance.