Hello,

Try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.

You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).

Then perform these steps:

1. Open Firefox Options window (Preferences on Mac or Linux) as follows:
   • In Firefox 29.0 and above, click the menu button and select Options for Windows or Preferences on Mac or Linux.
   • In Firefox 28.0 and previous versions, click the orange Firefox button at the top left, then select the "Options" button, or, if there is no Firefox button at the top, go to Tools > Options.
2. In the Firefox Options (or Preferences) window, click the Advanced tab, then select General.
3. In the settings list, you should find the Use hardware acceleration when available checkbox. Uncheck this checkbox.
4. Now, restart Firefox and see if the problems persist.

Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

• Upgrade your graphics drivers to use hardware acceleration and WebGL

Did this fix your problems? Please report back to us!

Thank you.

hello thanks for your suggestions disabling hardware accel dont help graphic card - ati radeon HD3400 it was with original drivers supplied with the card now downloaded latest drivers from amd website, with or without hardware accel - the problem still exist just a minute browsing around ebay and it is happening again

Ok what we can also try are these troubleshooting steps:

• https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-...

Particularly these steps:

1. Try to disable some of your extensions to see if there are any improvements.
2. Hide obtrusive content section
3. Disable Flash acceleration

Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/

all above already tried before with no success the only that worked now is flash block add on and more wired - with flash block installed - working fine then removed flash block AND disabled flash player plug in - again problem also - didnt noticed any problems with youtube, but browsing ebay - always cause this problem flash player is latest version it look like a wired issue between Mozilla and flash player switched to chrome a week ago so far working fine on ebay and flash enabled without any issues