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YouTube programs won't load in Firefox

Posted

For months now, when I go to YouTube on Firefox, I get the attached message.

If I go to YouTube using Safari, no problem. I can play the videos without a hitch.

How can I fix this? I LIKE Firefox and would prefer to continue using it.

Thanks, Duncan

For months now, when I go to YouTube on Firefox, I get the attached message. If I go to YouTube using Safari, no problem. I can play the videos without a hitch. How can I fix this? I LIKE Firefox and would prefer to continue using it. Thanks, Duncan
Attached screenshots

Chosen solution

Did you already upgrade your Firefox 44.0.2 version to the current release?

The System Details list next to the question shows that you run an older Firefox version that is no longer supported with security updates. Please update to the current Firefox 55.0.2 release.

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Additional System Details

Installed Plug-ins

  • Creative Cloud Desktop Plugin.v_3_0_0_0
  • Provides information about the default web browser
  • The Flip4Mac WMV Plugin allows you to view Windows Media content using QuickTime.
  • The Google Earth Plugin allows you to view 3D imagery and terrain in your web browser.
  • Displays Java applet content, or a placeholder if Java is not installed.
  • LogMeIn remote control components
  • Office Live Update v1.0
  • Musicnotes Viewer plugin 1.17.2 http://www.musicnotes.com
  • Picasa plugin.
  • RealPlayer Plugin
  • Microsoft Office for Mac SharePoint Browser Plug-in
  • Shockwave Flash 26.0 r0
  • Adobe Shockwave for Director Netscape plug-in, version 12.2.5
  • WebEx64 General Plugin Container Version 205
  • iPhoto6

Application

  • Firefox 44.0.2
  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:44.0) Gecko/20100101 Firefox/44.0
  • Support URL: https://support.mozilla.org/1/firefox/44.0.2/Darwin/en-US/

Extensions

  • Norton Security 7.4.0f166 (nortonsecurity@symantec.com)
  • YouTube Flash Video Player 54.0 ({f3bd3dd2-2888-44c5-91a2-2caeb33fb898})
  • FlashMall 0.95.24 (837a165494f7440b8dc6b1ff2bf06@79bf096c24fc443d8b018a.com) (Inactive)
  • Search Genius 0.1 (jid1-VdJycrAITglSAg@jetpack) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription:
  • adapterDeviceID: 0x6798
  • adapterDrivers:
  • adapterRAM:
  • adapterVendorID: 0x1002
  • driverDate:
  • driverVersion:
  • failures: [u'[GFX1-]: GLContext is disabled due to a previous crash.', u'[GFX1-]: GLContext is disabled due to a previous crash.', u'[GFX1-]: GLContext is disabled due to a previous crash.', u'[GFX1-]: GLContext is disabled due to a previous crash.', u'[GFX1-]: GLContext is disabled due to a previous crash.', u'[GFX1-]: GLContext is disabled due to a previous crash.']
  • indices: [0, 11, 7, 8, 9, 10]
  • info: {u'AzureCanvasBackend': u'skia', u'AzureFallbackCanvasBackend': u'none', u'AzureContentBackend': u'quartz', u'AzureSkiaAccelerated': 1}
  • numAcceleratedWindows: 2
  • numTotalWindows: 2
  • supportsHardwareH264: No;
  • webglRendererMessage: [u'']
  • windowLayerManagerRemote: True
  • windowLayerManagerType: OpenGL

Modified Preferences

Misc

  • User JS: No
  • Accessibility: No
FredMcD
  • Top 10 Contributor
3170 solutions 42806 answers
Youtube currently uses the HTML5 player. https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues
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Question owner

Fred, thanks for the link. I installed practically every plug in, but nothing helped. I'm not hugely tech savvy, so I appreciate your trying to point me toward a solution. Any specific steps I should take.

I operate on a MacPro with El Capitan 10.11.6.

Thanks, Duncan

Fred, thanks for the link. I installed practically every plug in, but nothing helped. I'm not hugely tech savvy, so I appreciate your trying to point me toward a solution. Any specific steps I should take. I operate on a MacPro with El Capitan 10.11.6. Thanks, Duncan
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cor-el
  • Top 10 Contributor
  • Moderator
15586 solutions 141085 answers

Try to uninstall the YouTube Flash Video Player 54.0 since this extension might not be compatible with the changed YouTube behavior. YouTube no longer can be forced to use the Shockwave Flash plugin if that was what you tried to do.

Try to uninstall the YouTube Flash Video Player 54.0 since this extension might not be compatible with the changed YouTube behavior. YouTube no longer can be forced to use the Shockwave Flash plugin if that was what you tried to do.
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Question owner

Cor-el, I didn't have YouTube Flash Video Player 54 installed. So that can't be the problem. But I welcome any other ideas you have!

Cor-el, I didn't have YouTube Flash Video Player 54 installed. So that can't be the problem. But I welcome any other ideas you have!
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Question owner

Cor-el, I didn't have YouTube Flash Video Player 54 installed. So that can't be the problem. But I welcome any other ideas you have!

Cor-el, I didn't have YouTube Flash Video Player 54 installed. So that can't be the problem. But I welcome any other ideas you have!
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cor-el
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15586 solutions 141085 answers

That extension shows in the System Details list next to the question:

  • YouTube Flash Video Player 54.0 ({f3bd3dd2-2888-44c5-91a2-2caeb33fb898})
That extension shows in the System Details list next to the question: * YouTube Flash Video Player 54.0 ({f3bd3dd2-2888-44c5-91a2-2caeb33fb898}) *https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Modified by cor-el

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Question owner

Cor-el, Sorry to be so dense, but can we start with basics: • Your reply speaks about "that extension" What extension? Is this referring to "YouTube Flash Video Player 54.0"? • You refer to the "System Details". Where are they located? I did a search in Firefox and it indicated there were over 700 references. Which one are you referring to? • The reply says "next to the question." What question does this refer to? • There is a link included in your reply that leads to a lengthy explanation. What specifically would you like me to do there? Thanks for your clarifications and your effort to help me.

Cor-el, Sorry to be so dense, but can we start with basics: • Your reply speaks about "that extension" What extension? Is this referring to "YouTube Flash Video Player 54.0"? • You refer to the "System Details". Where are they located? I did a search in Firefox and it indicated there were over 700 references. Which one are you referring to? • The reply says "next to the question." What question does this refer to? • There is a link included in your reply that leads to a lengthy explanation. What specifically would you like me to do there? Thanks for your clarifications and your effort to help me.
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FredMcD
  • Top 10 Contributor
3170 solutions 42806 answers

Some of your system details are posted when you ask a question. No Personal Information Is Collected. Go to the top right of the page. Open Question details At the bottom of that box, press More system details


Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Look for; YouTube Flash Video Player 54.0 and disable or remove it.

Some of your system details are posted when you ask a question. '''No Personal Information Is Collected. ''' Go to the top right of the page. Open '''Question details''' At the bottom of that box, press '''More system details''' --------------------- Type '''about:addons'''<enter> in the address bar to open your Add-ons Manager. Hot key; '''<Control> ''(Mac=<Command>)'' <Shift> A) ''' In the Add-ons Manager, on the left, select '''Extensions. ''' Look for; YouTube Flash Video Player 54.0 and disable or remove it.
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Helpful Reply

Fred,

Thanks so much for the detailed step-by-step actions. I did them all and disabled YouTube Flash Video Player. I then shut down Firefox and reopened it. But YouTube videos will still NOT play. This is frustrating.

Any other thoughts? I certainly welcome your help. Thank you. Duncan

Fred, Thanks so much for the detailed step-by-step actions. I did them all and disabled YouTube Flash Video Player. I then shut down Firefox and reopened it. But YouTube videos will still NOT play. This is frustrating. Any other thoughts? I certainly welcome your help. Thank you. Duncan
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cor-el
  • Top 10 Contributor
  • Moderator
15586 solutions 141085 answers

Chosen Solution

Did you already upgrade your Firefox 44.0.2 version to the current release?

The System Details list next to the question shows that you run an older Firefox version that is no longer supported with security updates. Please update to the current Firefox 55.0.2 release.

Did you already upgrade your Firefox 44.0.2 version to the current release? The System Details list next to the question shows that you run an older Firefox version that is no longer supported with security updates. Please update to the current Firefox 55.0.2 release. *"Firefox -> About Firefox" *https://support.mozilla.org/en-US/kb/update-firefox-latest-version
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Question owner

Dear Cor-el (and Fred). That was the solution!!! I had assumed Firefox was up to date, and it wasn't. I had simply let it slip to where it no longer opened YouTube. So I took your advice and updated it and... YouTube now plays! Thank you, thank you, thank you. I volunteer full time with several nonprofits and when I have to do research in YouTube, I'd prefer to use Firefox on which I keep all my bookmarks. And now I can.

Thank you both again. With warmest good wishes, Duncan

Dear Cor-el (and Fred). That was the solution!!! I had assumed Firefox was up to date, and it wasn't. I had simply let it slip to where it no longer opened YouTube. So I took your advice and updated it and... YouTube now plays! Thank you, thank you, thank you. I volunteer full time with several nonprofits and when I have to do research in YouTube, I'd prefer to use Firefox on which I keep all my bookmarks. And now I can. Thank you both again. With warmest good wishes, Duncan
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