I forgot the enclosure

Are you using any blocking programs / add-ons?

If you have problems with current Shockwave Flash plugin versions then check this:

• see if there are updates for your graphics drivers

https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

• disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

• disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

That didn't work, because it is only with this one website. Other websites work perfectly on my firefox browser.

Thanks anyway.

Did you click the Lego block icon at the left end of the location/address bar to make sure that Flash is allowed and check the permissions in "Tools > Page Info > Permissions"?

You can remove all data stored in Firefox from a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History > Show All History" or "View > Sidebar > History") or via the about:permissions page.

Using "Forget About This Site" will remove all data stored in Firefox from that domain like bookmarks, cookies, passwords, cache, history, and exceptions, so be cautious. If you have a password or other data from that domain that you do not want to lose then make sure to backup this data or make a note.

You can't recover from this 'forget' unless you have a backup of the involved files.

If you revisit a 'forgotten' website then data from that website will be saved once again.

To bad. This didn't help. The Lego block shows that flash player is allowed. And removing all data didn't help either.

I think it's a bug in this specified site http://www.gpupdate.net/nl/videos/7123/stallone-over-de-helm-van-ayrton-senna/

To bad. We have to switch to IE to watch it.

Thanks for your help anyway.

Works for me on Linux, but that is with an older Flash version (Adobe only has 11.2.202.* versions for Linux).

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: "3-bar" menu button/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

You can check for problems with current Shockwave Flash plugin versions and hardware acceleration in Firefox and try this:

• make sure you have the latest Flash version:
  http://www.adobe.com/special/products/flashplayer/fp_distribution3.html
• check for updates for your graphics drive drivers
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
• disable protected mode in the Flash plugin (Windows Vista and later)
  https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox
• disable hardware acceleration in the Flash plugin
  https://helpx.adobe.com/flash-player/kb/video-playback-issues.html
• disable hardware acceleration in Firefox
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

Firefox 44 on Linux, Flash 20.0.0.286 The video works fine here. http://www.gpupdate.net/en/f1-news/334830/stallone-senna-asked-me-to-play-him-in-film/

I'm sorry it's to complicated for me.

I let it be and hope with a new update from flash player my problem will be fixed.

LCKS1970 said

I'm sorry it's to complicated for me. I let it be and hope with a new update from flash player my problem will be fixed.

I tried starting in safe mode, didn't solve my problem.

It must be a problem on the website in combination with my Windows 7 and Flash Player 2.... version.

All other websites work perfectly and all the problem shooter things don't solve my problem.

I set my question on closed. So you don't need to help me anymore.

Confirmed. Firefox 43 Win 7: no clip Win IE: no problem