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Can't play YouTube HTML5 videos in Firefox 26

Posted

I'm using Firefox 26 in Windows 7 x64 SP1.Since yesterday I can't play Youtube HTML5 videos. I have the HTML5 player activated in http://www.youtube.com/html5 and when I try to play a compatible video, like this one: http://www.youtube.com/watch?v=BGBM5vWiBLo I get a big 'loading' animation and nothing happens.That same video is playing without a problem in Internet Explorer 11.

Thanks for your help.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.9 r900
  • Adobe Shockwave for Director Netscape plug-in, version 12.0.5.146
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Next Generation Java Plug-in 10.45.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • SiteAdvisor
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.05
  • McAfee MSC FF plugin DLL
  • Spoon Plugin 3.33
  • SpawnApps Plugin
  • NPWLPG
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • np-mswmp

Application

  • Firefox 26.0
  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0
  • Support URL: https://support.mozilla.org/1/firefox/26.0/WINNT/es-ES/

Extensions

  • Adblock Plus 2.4 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d})
  • Firebug 1.12.5 (firebug@software.joehewitt.com)
  • InstantFox 2.8.4 (searchy@searchy)
  • McAfee SiteAdvisor 3.6.3 ({4ED1F68A-5463-4931-9384-8FFF5ED91D92})
  • Shumway 0.7.869 (shumway@research.mozilla.org)
  • Troubleshooter 1.1a (troubleshooter@mozilla.org)
  • Xoda Entertainment 1.5 (a00c98@wips.com)
  • Bing Bar 6.0 (msntoolbar@msn.com) (Inactive)
  • Default Manager 2.2 ({3252b9ae-c69a-4eaf-9502-dc9c1f6c009e}) (Inactive)
  • Search Helper Extension 1.0 ({27182e60-b5f3-411c-b545-b44205977502}) (Inactive)
  • Skype Click to Call 6.13.0.13771 ({82AF8DCA-6DE9-405D-BD5E-43525BDAD38A}) (Inactive)
  • Visor de PDF 0.8.783 (uriloader@pdf.js) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription: Intel(R) HD Graphics
  • adapterDescription2:
  • adapterDeviceID: 0x0046
  • adapterDeviceID2:
  • adapterDrivers: igdumd64 igd10umd64 igdumdx32 igd10umd32
  • adapterDrivers2:
  • adapterRAM: Unknown
  • adapterRAM2:
  • adapterVendorID: 0x8086
  • adapterVendorID2:
  • clearTypeParameters: Gamma: 2200 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50
  • direct2DEnabled: True
  • directWriteEnabled: True
  • directWriteVersion: 6.2.9200.16492
  • driverDate: 1-30-2013
  • driverDate2:
  • driverVersion: 8.15.10.2993
  • driverVersion2:
  • info: {u'AzureCanvasBackend': u'direct2d', u'AzureFallbackCanvasBackend': u'cairo', u'AzureContentBackend': u'direct2d', u'AzureSkiaAccelerated': 0}
  • isGPU2Active: False
  • numAcceleratedWindows: 1
  • numTotalWindows: 1
  • webglRenderer: Google Inc. -- ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0)
  • windowLayerManagerRemote: False
  • windowLayerManagerType: Direct3D 10

Modified Preferences

  • accessibility.accesskeycausesactivation: False
  • accessibility.typeaheadfind.flashBar: 0
  • browser.cache.disk.capacity: 25600
  • browser.cache.disk.smart_size.enabled: False
  • browser.cache.disk.smart_size.first_run: False
  • browser.cache.disk.smart_size.use_old_max: False
  • browser.cache.disk.smart_size_cached_value: 358400
  • browser.cache.memory.capacity: 40000
  • browser.places.smartBookmarksVersion: 4
  • browser.privatebrowsing.autostart: True
  • browser.sessionstore.upgradeBackup.latestBuildID: 20131205075310
  • browser.startup.homepage: https://www.google.es/
  • browser.startup.homepage_override.buildID: 20131205075310
  • browser.startup.homepage_override.mstone: 26.0
  • dom.ipc.plugins.enabled.npspawnapps1.0.0.5.dll: False
  • dom.mozApps.used: True
  • extensions.lastAppVersion: 26.0
  • font.internaluseonly.changed: False
  • gfx.direct3d.last_used_feature_level_idx: 1
  • media.mediasource.enabled: True
  • network.cookie.prefsMigrated: True
  • places.database.lastMaintenance: 1387284094
  • places.history.expiration.transient_current_max_pages: 98744
  • plugin.disable_full_page_plugin_for_types:
  • plugin.importedState: True
  • plugin.state.npctrl: 0
  • plugin.state.nppdf: 2
  • plugin.state.npwinext: 0
  • plugins.load_appdir_plugins: True
  • privacy.donottrackheader.enabled: True
  • privacy.sanitize.migrateFx3Prefs: True
  • storage.vacuum.last.index: 1
  • storage.vacuum.last.places.sqlite: 1386508114

Misc

  • User JS: Yes
  • Accessibility: No
rodrigocft 25 solutions 171 answers

Hello,

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

  • On Windows you can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
  • On Mac you can open Firefox 4.0+ in Safe Mode by holding the option key while starting Firefox.
  • On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
  • Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

FirefoxSafeMode

Once you get the pop-up, just select "'Start in Safe Mode" Safe Mode Fx 15 - Win

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank you.

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Helpful Reply

Thanks for your answer. I tried Safe Mode and the issue still remains, only now the loading animation is smaller, yet nothing happens. I don't think this is an extension or plugin-related problem, since I don't have anything installed related to HTML5 or YouTube.

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KT091 0 solutions 1 answers

I had the same problem with Firefox and found out that the thing causing the problem was the Cooliris add-on. As soon as I deactivated it, videos started to play just fine at You Tube.

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