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FF freezes my whole computer when watching videos. What to do?!

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Hi there. So, for quite a while now, Firefox keeps on freezing my whole computer while watching videos on YouTube or streams on Twitch. It started a few weeks back & when I couldn't resolve the problem, I changed to Chrome. But I just don't like it, so yesterday, I decided to go back to my fav browser: Firefox.

But my problem remains: When I'm watching a video, my browser constantly keeps freezing my whole MacBook. It starts with the video just stopping but the audio keeps going on for some 10-20 seconds. Then I can't move the cursor anymore & finally the sound dies & nothing reacts anymore. I can't even open the Activity Monitor or do anything else. So the only possibility for me to get back doing stuff is to hard reset my laptop & boot it again. This just happened to me twice in the last two & 4 or 5 times in the last 24 hours... I would really appreciate, if anyone could point me towards an solution.

Oh, and I'm on OS X 10.10.2 using Firefox 36.0.1 (but it also happened on 35.x before). Hardware Acceleration is turned off & flash is on its latest version. Cache has been flushed several times as well.

Hi there. So, for quite a while now, Firefox keeps on freezing my whole computer while watching videos on YouTube or streams on Twitch. It started a few weeks back & when I couldn't resolve the problem, I changed to Chrome. But I just don't like it, so yesterday, I decided to go back to my fav browser: Firefox. But my problem remains: When I'm watching a video, my browser constantly keeps freezing my whole MacBook. It starts with the video just stopping but the audio keeps going on for some 10-20 seconds. Then I can't move the cursor anymore & finally the sound dies & nothing reacts anymore. I can't even open the Activity Monitor or do anything else. So the only possibility for me to get back doing stuff is to hard reset my laptop & boot it again. This just happened to me twice in the last two & 4 or 5 times in the last 24 hours... I would really appreciate, if anyone could point me towards an solution. Oh, and I'm on OS X 10.10.2 using Firefox 36.0.1 (but it also happened on 35.x before). Hardware Acceleration is turned off & flash is on its latest version. Cache has been flushed several times as well.

Chosen solution

Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles:

Please tell us if this helped!

Read this answer in context 1

Additional System Details

Installed Plug-ins

  • Bietet Informationen über den Standardwebbrowser
  • 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.
  • View PDF documents within your web browser.
  • Mit dem QuickTime Plug-in können Sie eine Vielzahl von Multimedia-Inhalten auf Webseiten anzeigen. Weitere Informationen erhalten Sie auf der Web-Site für QuickTime.
  • Microsoft Office for Mac SharePoint Browser Plug-in
  • Shockwave Flash 16.0 r0
  • 5.1.20513.0
  • Unity Web Player version 4.3.5f1. (c) 2013 Unity Technologies ApS. All rights reserved.
  • Enables the interaction of Mathematica content with the latest installed version of Mathematica.
  • iPhoto6

Application

  • Firefox 36.0.1
  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:36.0) Gecko/20100101 Firefox/36.0
  • Support URL: https://support.mozilla.org/1/firefox/36.0.1/Darwin/de/

Extensions

  • Adblock Plus 2.6.7 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d})
  • Adblock Plus Popup-Addon 0.9.2 (adblockpopups@jessehakanen.net)
  • Autofill Forms 1.0.3 (autofillForms@blueimp.net)
  • Flagfox 5.0.12 ({1018e4d6-728f-4b20-ad56-37578a4de76b})
  • Flashblock 1.5.18 ({3d7eb24f-2740-49df-8937-200b1cc08f8a})
  • New Tab JumpStart 0.5a5.5.4 (jumpstart@mihailo.lalevic)
  • ProxTube - Gesperrte YouTube Videos entsperren 2.0.0.1 (ich@maltegoetz.de)
  • Stylish 2.0.2 ({46551EC9-40F0-4e47-8E18-8E5CF550CFB8})
  • Twitch.tv Stream Browser 1.30 (jid0-5q424C3HVeyE2T4d9bkO7CpXNjU@jetpack)
  • Firefox Certificate Store Hotfix 20150225.01 (firefox-hotfix@mozilla.org) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription:
  • adapterDeviceID: 0x 8a0
  • adapterDrivers:
  • adapterRAM:
  • adapterVendorID: 0x10de
  • driverDate:
  • driverVersion:
  • info: {u'AzureCanvasBackend': u'quartz', u'AzureFallbackCanvasBackend': u'none', u'AzureContentBackend': u'quartz', u'AzureSkiaAccelerated': 0}
  • numAcceleratedWindows: 0
  • numAcceleratedWindowsMessage: [u'']
  • numTotalWindows: 2
  • webglRenderer: NVIDIA Corporation -- NVIDIA GeForce 320M OpenGL Engine
  • windowLayerManagerRemote: False
  • windowLayerManagerType: Basic

Modified Preferences

Misc

  • User JS: No
  • Accessibility: No
kushagra 6 solutions 109 answers

Chosen Solution

Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles:

Please tell us if this helped!

Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles: * [[Flash Plugin - Keep it up to date and troubleshoot problems]] * [[Adobe Flash plugin has crashed - Prevent it from happening again]] <!--Please also note that html5 may need to be enabled to view some videos on youtube [https://www.youtube.com/html5]--> Please tell us if this helped!
kushagra 6 solutions 109 answers

kushagra said

Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles: Please tell us if this helped! you may also refer for more help here: https://support.mozilla.org/en-US/kb/keep-flash-up-to-date-and-troubleshoot-problems#w_playing-flash-videos-makes-firefox-hang
''kushagra [[#answer-699875|said]]'' <blockquote> Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles: * [[Flash Plugin - Keep it up to date and troubleshoot problems]] * [[Adobe Flash plugin has crashed - Prevent it from happening again]] <!--Please also note that html5 may need to be enabled to view some videos on youtube [https://www.youtube.com/html5]--> Please tell us if this helped! you may also refer for more help here: https://support.mozilla.org/en-US/kb/keep-flash-up-to-date-and-troubleshoot-problems#w_playing-flash-videos-makes-firefox-hang </blockquote>

Question owner

kushagra said

Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles: Please tell us if this helped!

So it seems like disabling Flash's own Hardware Acceleration (which I didn't even know was a thing) solved my problem. At least there were no more crashes so far.

Thanks a lot!

''kushagra [[#answer-699875|said]]'' <blockquote> Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles: * [[Flash Plugin - Keep it up to date and troubleshoot problems]] * [[Adobe Flash plugin has crashed - Prevent it from happening again]] <!--Please also note that html5 may need to be enabled to view some videos on youtube [https://www.youtube.com/html5]--> Please tell us if this helped! </blockquote> So it seems like disabling Flash's own Hardware Acceleration (which I didn't even know was a thing) solved my problem. At least there were no more crashes so far. Thanks a lot!

Modified by EddyTheGr8

cannonmc 0 solutions 12 answers

I have the same problem. But only since yesterday when I updated to FF39 and updated Flash at the same time.

I am using Windows 7 and had no problem like this using FF19 and FF38.

I don't have to reboot, just close a restart FF which is slightly annoying if I'm on a site which has a 'view new content since last vist' as the last visit was only 3 seconds before.

I have disabled Flash Hardware Acceleration to no effect.

I have the same problem. But only since yesterday when I updated to FF39 and updated Flash at the same time. I am using Windows 7 and had no problem like this using FF19 and FF38. I don't have to reboot, just close a restart FF which is slightly annoying if I'm on a site which has a 'view new content since last vist' as the last visit was only 3 seconds before. I have disabled Flash Hardware Acceleration to no effect.