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No sound on Youtube with FF 16, 17 and Flash Player 10 and upwards

Posted

This problem started about a month ago and I only just got around to trying to fix it.

Symptom: No sound on some but not all videos on Youtube.

Firefox 16 and Firefox 17 Tried with Flashplayer 11.5, 11.4, 11.2, 10.4. It happens in safe mode. It happens even when all Add-ons are disabled.

It does not happen in Chrome.

I'd be very grateful for suggestions on how to troubleshoot this. I've already googled extensively and none of the suggestions I found helped.

This problem started about a month ago and I only just got around to trying to fix it. Symptom: No sound on some but not all videos on Youtube. Firefox 16 and Firefox 17 Tried with Flashplayer 11.5, 11.4, 11.2, 10.4. It happens in safe mode. It happens even when all Add-ons are disabled. It does not happen in Chrome. I'd be very grateful for suggestions on how to troubleshoot this. I've already googled extensively and none of the suggestions I found helped.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.2 r202
  • Next Generation Java Plug-in 10.9.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Google Update
  • NVIDIA 3D Vision plugin for Mozilla browsers
  • NVIDIA 3D Vision Streaming plugin for Mozilla browsers
  • Nitro PDF plugin for Firefox and Chrome
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • iTunes Detector Plug-in
  • VLC media player Web Plugin 2.0.2
  • Nexus Personal Plug-Ins
  • GEPlugin
  • 4.1.10329.0
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.2
  • Adobe Shockwave for Director Netscape plug-in, version 11.5.9.620
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • 6.0.12.69

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0

More Information

Tyler Downer
  • Moderator
1386 solutions 9332 answers

Try the following:

Update to flash player 11.5.

Try the suggestions at Flash 11.3 doesn't load video in Firefox

If that doesn't work try to reset Firefox Refresh Firefox - reset add-ons and settings

Try the following: Update to flash player 11.5. Try the suggestions at [[Flash 11.3 doesn't load video in Firefox]] If that doesn't work try to reset Firefox [[Reset Firefox – easily fix most problems]]

Question owner

Hi, Thanks for the response. I probably wasn't clear enough, but I have already been on Flash Player 11.5 with no success.

Hi, Thanks for the response. I probably wasn't clear enough, but I have already been on Flash Player 11.5 with no success.
Tyler Downer
  • Moderator
1386 solutions 9332 answers

Yes, but I would like you to update to 11.5 again, and try more troubleshooting steps with that most recent version of flash.

Yes, but I would like you to update to 11.5 again, and try more troubleshooting steps with that most recent version of flash.

Question owner

Hi - yes, no worries, I did what you said anyway, and re-installed 11.5. There is no difference. There is sound to some videos, but not others.

I've cleared the Flash cache and the FF cache. I am very reluctant to reset, but I'll try it as a last resort if I can figure out a way to backup everything first.

Sound for these two videos does not work. One is old, one is new....

http://www.youtube.com/watch?v=I_NKU5ofJfA http://www.youtube.com/watch?v=dXTRANvdouQ

Sound for these two works: http://www.youtube.com/watch?v=sQGujsHcq6U&feature=related http://www.youtube.com/watch?v=tfrWuiQ4QNc&feature=related

Hi - yes, no worries, I did what you said anyway, and re-installed 11.5. There is no difference. There is sound to some videos, but not others. I've cleared the Flash cache and the FF cache. I am very reluctant to reset, but I'll try it as a last resort if I can figure out a way to backup everything first. Sound for these two videos does not work. One is old, one is new.... http://www.youtube.com/watch?v=I_NKU5ofJfA http://www.youtube.com/watch?v=dXTRANvdouQ Sound for these two works: http://www.youtube.com/watch?v=sQGujsHcq6U&feature=related http://www.youtube.com/watch?v=tfrWuiQ4QNc&feature=related
Tyler Downer
  • Moderator
1386 solutions 9332 answers

Helpful Reply

A reset does restore your information, but if you want to backup anyway, read Back up and restore information in Firefox profiles

A reset does restore your information, but if you want to backup anyway, read [[Back up and restore information in Firefox profiles]]

Question owner

Hi again! I did something similar to reset; I created a new profile. With this profile, the sound works. I don't understand why, since I disabled all extensions with my regular profile, and still had the problem....

But how do I find out what the problem with my current profile is...?

It is set up just so... I've got about 30 extensions active and some of them have settings. I want it exactly the right way otherwise I might as well use Chrome...

Hi again! I did something similar to reset; I created a new profile. With this profile, the sound works. I don't understand why, since I disabled all extensions with my regular profile, and still had the problem.... '''But how do I find out what the problem with my current profile is...?''' It is set up just so... I've got about 30 extensions active and some of them have settings. I want it exactly the right way otherwise I might as well use Chrome...
Tyler Downer
  • Moderator
1386 solutions 9332 answers

I'm going to bet it was your extensions. Even running with them disabled doesn't revert any settings they may have changed that could have caused this.

Transfer your information from your old profile to your new profile, and then re-install your extensions. That is the most time-efficient way to do this. Recovering important data from an old profile

I'm going to bet it was your extensions. Even running with them disabled doesn't revert any settings they may have changed that could have caused this. Transfer your information from your old profile to your new profile, and then re-install your extensions. That is the most time-efficient way to do this. [[Recovering important data from an old profile]]

Question owner

As soon as I copied over the information from the old user folder to the new user folder, the problem returned. I've spent 5 hours on this now. :-( So irritated.

I'll reset Firefox but it's clear from the information that I'll have to spend ages then trying to locate all the extensions, do a fresh install of the extensions one by one. This is what I wanted to avoid doing.

As soon as I copied over the information from the old user folder to the new user folder, the problem returned. I've spent 5 hours on this now. :-( So irritated. I'll reset Firefox but it's clear from the information that I'll have to spend ages then trying to locate all the extensions, do a fresh install of the extensions one by one. This is what I wanted to avoid doing.

Question owner

Reset did not work either, The only thing that works seems to be creating a brand new profile, from scratch.

Reset did not work either, The only thing that works seems to be creating a brand new profile, from scratch.
cor-el
  • Top 10 Contributor
  • Moderator
16251 solutions 146687 answers

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

Try to clear the Flash local storage and settings.

  • Windows Control Panel > Flash Player > Storage: Local Storage Settings
    • Remove a specific domain: Local Storage Settings by site
    • Remove all domains: Delete All and Delete Data

Flash Website Storage Settings panel:

Global Storage Settings Panel:

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps. *http://windows.microsoft.com/en-US/windows7/Advanced-startup-options-including-safe-mode Try to clear the Flash local storage and settings. *Windows Control Panel > Flash Player > Storage: Local Storage Settings **Remove a specific domain: Local Storage Settings by site **Remove all domains: Delete All and Delete Data Flash Website Storage Settings panel: *http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html Global Storage Settings Panel: *http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager03.html