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Flash videoes are laggy in full screen


I'm currently using the latest versions of both firefox and flash. I can play flash videoes and games fine, but as soon as i go full screen, the video lags, and you can hear the audio stuttering and the mouse is a little unresponsive.

Trying to watch HQ videoes in full screen is totally out of the question and lags really badly.

I've tried cleaning cache, turning off hardware acceleration, and cleaning flash files, but it still happens.

Is there anything else i could try?

Modifié le par DuZo

Détails additionnels sur le système

Plugins installés

  • Shockwave Flash 11.5 r502
  • Next Generation Java Plug-in 1.6.0_37 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Nexon Game Controller
  • Adobe Shockwave for Director Netscape plug-in, version
  • getplusplusadobe16263
  • OGPlanet Game Plugin
  • OGPlanet Game Launcher Plugin for Mozilla
  • RealJukebox Netscape Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • npijjiFFPlugin1
  • npdnupdater2
  • npdnu
  • ijji Auto Install Plugin for Mozilla
  • MFireLauncher
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • npunagi2
  • Adobe PDF Plug-In For Firefox and Netscape
  • np-mswmp
  • Office Plugin for Netscape Navigator


  • Agent utilisateur : Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20100101 Firefox/17.0

Plus d'informations

David McRitchie 321 solutions 3089 réponses

Réponse utile

Besides clearing cache, clear the the temporary folders on your system. Check your Windows Task Manager for applications that you no longer want, and get rid of them.

Update your plugins - sounds like you may have done this, since you updated Flash.


Update your extensions. about:addons Update all your filter subscriptions in Adblock Plus with Right click on ABP button > Filter Preferences > Action > update filter Reboot your system and bring up Firefox

I suspect it was the filter subscriptions and/or the reboot that fixed things on my system.

Modifié le par David McRitchie

Réponse utile

I updated anything else that needed to be, and did that update filter at Adblock Plus.

It's... a bit weird. When i try at youtube, it doesn't lag. When i switch to HD video it lags a tiny bit, and less when i let the bar disappear, but if i right click to display options it gets really really laggy.

On other sites it lags and skips frames even though the video is low quality.

  • Top 10 Contributor
  • Moderator
10738 solutions 96600 réponses

Did you try to disable hardware acceleration in the Flash player?

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.

Auteur de la question

I have disabled hardware acceleration, protected mode, and realplayer plugin. Doesn't help. Default theme at appearance is what i already use. In Safe Mode there is also still no change.