Hello csirisky, try disabling graphics hardware acceleration.

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 as follows: click the menu button and select Options .
2. In the Firefox Options 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.

csirisky said

I have never had this problem with firefox. Opened on my windows 7 machine and everything is choppy and slow, every keystroke is delayed as is every response is delayed. It works but its wierd. Tried reset, tried some fixes and finally uninstalled and reinstalled with out any success. I am using google chrome and it runs fine and so does internet explorer and every other program. Help!

Unchecked the hardware acceleration as recommended, restarted firefox and back to normal.

Thanks ideato.

Just as an update, after investigation of general hardware acceleration issues there is an update going out today that should resolve this. The new version will be 38.0.5RC. Thank you for your patience, please do report back if there are any further issues.