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videos dont play on firefox


Firefox won't play any videos youtube flash etc. However IE does play them, I have tried many things like installing and desinstaling flash and nothing. Any ideas?

Additional System Details

This happened

Every time Firefox opened


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1

More Information

  • Top 10 Contributor
  • Moderator
10779 solutions 97013 answers

This can be caused by a recent Flash 11.3 update.


Question owner

Fixed! Thank you so much! I have been struggling and trying many things none of them worked, this did it! :-)

kennthcole 0 solutions 1 answers

I have the same problem!!!

  • Top 10 Contributor
  • Moderator
10779 solutions 97013 answers

Hi kennthcole.

Can you please start a new thread for your question?

Then you can provide more information like your operating system and installed extensions and installed plugins.

You can check for problems caused by recent Flash updates and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in Flash 11.3 and later
  • disable hardware acceleration in the Flash plugin

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do not click the Reset button on the Safe mode start window or otherwise make changes.